Image created with Gemini. Image prompt: Hand-painted Ghibli-style scene of a sunlit seaside cartographer’s shop window displaying a porcelain smiling mask inscribed with faint handwritten rules, half-lifted on a brass stand to reveal a folded paper labyrinth map behind it, with a wooden signboard above painted with the bold word ‘Anthropic’ in clean legible lettering, warm terracotta rooftops and teal harbor beyond, soft gouache watercolor backgrounds, golden-hour light, cinematic wide framing.
“Loop engineering” is a hot buzzphrase after mentions of it by Boris Cherny (Claude Code’s creator) and Peter Steinberger (OpenClaw’s creator) went viral on social media. Loops are now a key part of how we get AI agents to iterate at length to build software. In this letter, I’d”
https://x.com/AndrewYNg/status/2071988145667928442
Finally, we’ve added a new Managed Agents Observability tab in Console. This provides session-level metrics such as input/output token use and tool usage.”
https://x.com/ClaudeDevs/status/2072058433097122145
I’ve been getting a TON done with Fable today and I’m not hitting rate limits. Wanted to share some tips on how I’m doing that 1. I only use Fable on “high” effort for now. xhigh is token hungry. max/extra is a furnace with worse outputs than lower options imo 2. I taught”
https://x.com/theo/status/2072481845363822914
Introducing Claude Sonnet 5, our most agentic Sonnet yet. It makes plans, uses tools like browsers and terminals, and runs autonomously at a level that just a few months ago required larger and more expensive models.”
https://x.com/claudeai/status/2072017450611142835
It’s been 18 days since Fable 5 was banned. Kind of insane. I genuinely thought it would be back after a few days.”
https://x.com/theo/status/2072058513669693608
My one serious piece of advice having used Fable a bunch before release is that, unless you are careful it develops its own internal bizarre cadence & dialogue over long tasks. If you aren’t asking it report in plain language, this starts to creep into everything, including menus”
https://x.com/emollick/status/2072543365124481045
New Claude app strings suggest Anthropic is preparing to put Fable 5 behind a separate usage-credit system billed outside existing plans, with credits added only after identity verification. Anthropic previously said identity verification was unrelated to Fable and limited to”
https://x.com/kimmonismus/status/2071868011804266828
Redeploying Claude Fable 5 \ Anthropic
https://www.anthropic.com/news/redeploying-fable-5
We’ve added a few updates to Claude Managed Agents: Streaming session event deltas, per-session agent overrides, new webhook event types, reverse pagination, and credential injection scoping.”
https://x.com/ClaudeDevs/status/2072058428424589412
Since June 12, we’ve been working closely with the US government to restore access to Claude Mythos 5 and Fable 5. Today, the government notified us that Mythos 5, our strongest cybersecurity model, can be redeployed to a set of US organizations that operate and defend critical”
https://x.com/AnthropicAI/status/2070665903440871779
We’ve received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5. We’ll begin restoring access tomorrow, and will share an update soon. We’re grateful to our users for their patience, and to everyone who worked with us on”
https://x.com/anthropicai/status/2072106151890809341?s=46
This is crazier than you might think: Fable-5 now scores 16.10% on the Remote Labor Index What is RLI? The Remote Labor Index uses 240 real remote-work projects from professional freelancers, covering 23 domains and more than $140,000 of human work. Each task comes with the”
https://x.com/kimmonismus/status/2072376968729817531
Introducing Claude Sonnet 5 \ Anthropic
https://www.anthropic.com/news/claude-sonnet-5
Introducing Claude Tag \ Anthropic
https://www.anthropic.com/news/introducing-claude-tag
Nearly half of respondents expect their work responsibilities to significantly change in the next 12 months. Fewer than 10% think they’ll lose their own job within a year, but far more worry for coworkers: over 1/3 put the odds of a junior colleague losing their job above 60%.”
https://x.com/AnthropicAI/status/2070528969523499460
AI appears to be finding software vulnerabilities at scale. In June 2026, 21 notable organizations disclosed ~1,500 high- and critical-severity CVEs, over 3.5× the previous monthly record set before Claude Mythos Preview’s release.”
https://x.com/EpochAIResearch/status/2072776792809918604
GLM-5.2 is good but it is not GPT-5.5/Opus 4.8, and even further from Mythos. Yet it is solid & it demonstrates that the open models continue to chase the frontier What is happening is that open weights crossed into GPT-5.2 territory & capabilities at that point are considerable”
https://x.com/emollick/status/2071284966139568440
How good is GLM-5.2? GLM-5.2 (Max) ranks higher than Claude Opus 4.8 (Thinking) on Code Arena, where Frontend coding tasks are being voted on by the community. Below in thread are 10 examples of the same prompts given to both models and completed in a single shot.”
https://x.com/arena/status/2070563149481414779
GPT-5.6 is finally coming. GPT-5.6 Sol beats Claude Mythos 5 on TerminalBench. And on Cerebras, GPT-5.6 Sol can reach up to 750 tokens per second. Pretty fast for a model of this size. Now I just hope it can be rolled out to everyone.”
https://x.com/Yuchenj_UW/status/2070558714390863971
GPT-5.6 on par with Claude Mythos Preview on ExploitGym and outperforming it with a 6-hour cap (Mythos was only given 2 hours)”
https://x.com/scaling01/status/2070557417281110327
GPT-5.6 Sol is on par with Mythos Preview, but still behind Mythos 5 on ExploitBench”
https://x.com/scaling01/status/2070559400310231519
Anthropic Economic Index report: Cadences \ Anthropic
https://www.anthropic.com/research/economic-index-june-2026-report
Governor Newsom announces a first-of-its-kind partnership, providing Anthropic tools to state agencies and improving services for Californians | Governor of California
https://www.gov.ca.gov/2026/06/29/governor-newsom-announces-a-first-of-its-kind-partnership-providing-anthropic-tools-to-state-agencies-and-improving-services-for-californians/
Anthropic in Talks With Samsung to Manufacture Custom AI Chip — The Information
https://www.theinformation.com/articles/anthropic-talks-samsung-manufacture-custom-ai-chip
Anthropic is discussing a new custom chip with Samsung | TechCrunch
https://techcrunch.com/2026/07/02/anthropic-is-discussing-a-new-custom-chip-with-samsung/
Anthropic launches AI drug discovery program, Claude Science
https://www.cnbc.com/2026/06/30/anthropic-launches-ai-drug-discovery-program-claude-science.html
Claude Science, an AI workbench for scientists \ Anthropic
https://www.anthropic.com/news/claude-science-ai-workbench
Fable: “Last and First Men is out of copyright. I want you to make a movie that features a reading of it with appropriate mixes of animation and images using access to the APIs you have (elevenlabs, hugging face) . Give me the first 10-15 minutes, ending at an appropriate break.
https://x.com/emollick/status/2072872373758382497
sneaky, but also clever.”
https://x.com/steipete/status/2072233293035213052
Been reading all sorts of posts about the best ways to develop workflows for Fable and it reminds me of how little we actually know about the best ways to organize work for long-running agents. Nobody has enough experience or has done enough testing to reach any real conclusions.”
https://x.com/emollick/status/2072539615836213387
Claude 5 has so far been the worst launch by Anthropic Fable 5 isn’t available and Sonnet 5 was nerfed to death”
https://x.com/scaling01/status/2072044421634281636
Claude Fable 5 is available in Devin. You can use Fable 5 in Devin Cloud’s Ultra agent, our smartest and most capable agent, which excels at long-horizon tasks and debugging. Claude Fable 5 is also available in Devin Desktop and Devin CLI.”
https://x.com/cognition/status/2072405137117548601
Claude Sonnet 5 is here. Top-tier performance on coding and tool use at Sonnet pricing, with a 1M context window. It’s the new default in Claude Code for Pro users, and available everywhere on the Claude Platform, including the API and Managed Agents.”
https://x.com/ClaudeDevs/status/2072018504392601762
Claude Sonnet 5 is now available in Devin Desktop and Devin CLI. Sonnet 5 pairs frontier-level coding performance with a more affordable price point and outperforms Opus 4.8 on FrontierCode Extended.”
https://x.com/cognition/status/2072022778144821292
Claude Sonnet 5 is now available in Droid. Available 1/3 off for all users until August 31.”
https://x.com/FactoryAI/status/2072021755619864778
Computer Use isn’t included in this release, more coming soon. Read more in the docs:”
https://x.com/ClaudeDevs/status/2071988883802444125
Conventional model routing sucks. It passes benchmarks but fails to write code you’d actually merge. Introducing Devin Fusion, a new hybrid-model harness for agentic coding. In testing, it reduces the cost of Fable-level intelligence by 35% and still feels good to use.”
https://x.com/cognition/status/2071624568465490170
Excited to finally share “sidekick” and “mid-session routing” with the world! Our latest methods for multi-model routing. Headlines: – 35% cost savings – Still frontier-level on day-to-day – Works very well with Fable 5 Hope this helps other agent builders out there!”
https://x.com/walden_yan/status/2071627241818399181
Fable 5 is back.”
https://x.com/claudeai/status/2072402636813607381
Fable in Claude Code is capable of really amazing things, including for non-coders, but the interface is not really designed for managing 5+ hour long autonomous tasks. Really hard to observe what is happening and intervene in real time, you often have to wait until the outputs.”
https://x.com/emollick/status/2072722575126319366
Fable: “you have Unity and access to MCP. I want you to build a game that is a unique twist on a FPS. You want the player to say “wow” & “so clever” and to enjoy the core gameplay loop” WebGL:
https://t.co/xB707DCpBp * It had no assets so the graphics are procedurally generated”
https://x.com/emollick/status/2072749816690483301
Great experiment testing how good AIs are getting at very ambitious end-to-end coding tasks. Opus 4.7, in 14 hours, was able to build a software package that would take 2-17 weeks of human engineering work. It cost $251. The models are still not perfect, but are improving fast.”
https://x.com/emollick/status/2070537422027342085
Here we go: Sonnet 5 is live: The tl;dr • Anthropic calls it the most agentic Sonnet yet • Near Opus 4.8-level performance, but cheaper • Strong gains in reasoning, tool use, coding, and knowledge work • Default model for Free and Pro users • Available in Claude Code and”
https://x.com/kimmonismus/status/2072019015577333804
I have no idea if this is a legitimate leak. But a *Sonnet 5* release today would surely go hand in hand with a *Fable 5* re-release.”
https://x.com/kimmonismus/status/2071941904636531167
Just tweeting while waiting for my Fable runs to finish.”
https://x.com/emollick/status/2072406024158650744
Now that Fable 5 is ready to build (again), we’ve reset everyone’s 5-hour and weekly rate limits.”
https://x.com/ClaudeDevs/status/2072429181565288665
Person familiar with the discussions between the admin and Anthropic says conversations are expected to continue over the weekend on Fable, which was not restored with this latest development. Also says that conversations have been focused not just on resolving this export”
https://x.com/cheyennehaslett/status/2070670490494976491
Rumors about Sonnet 5 have been circulating for a long time. Now it looks like Sonnet 5 will be released alongside the re-release of Fable 5 (presumably with ID verification). This leaves a bad taste in my mouth, because it raises the possibility that those who might not be”
https://x.com/kimmonismus/status/2071899142616408377
Since its back, here were my impressions I posted a couple weeks ago of Fable after my time as an early access user (yes, it really is very impressive, but that shows off best in longer, harder tasks)”
https://x.com/emollick/status/2072450372602311145
Sonnet 5 incoming today per leaker @synthwavedd – Knowledge cutoff January 2026 – Launching at $2/$10 per Mtok promotional rate* – 1M context variant available I assume we at least (!) get also fable 5 news.”
https://x.com/kimmonismus/status/2071953298169778636
Sonnet 5 is here! This is going to support better long-running agents. Previous Sonnet models were unreliable, so it’s great to see the improved version that can complete agentic tasks more reliably. It also seems to have improved substantially in computer use.”
https://x.com/omarsar0/status/2072022542521438300
Super interesting workshop from @rubrikInc → Tame Your AI Monsters: Claude Edition Rubrik is the first organization to put Rubrik Agent Cloud to work governing a live Claude implementation Now, they’ll open that experience up in a hands-on lab. You will: • Watch a Claude”
https://x.com/TheTuringPost/status/2070657528925704438
Through Aug 31, Sonnet 5 will use roughly 30% less quota than Sonnet 4.6 in Devin Desktop/CLI. After that, it will use the same quota as Sonnet 4.6. Try it:”
https://x.com/cognition/status/2072022784084000810
Dynamic workflows (generating harnesses on the fly) are a new form of test-time compute. But LLMs aren’t great at building them. I often have to steer agents to generate complex patterns. Curious how effective Mythos/GPT-5.6 is at dynamically generating complex workflows.”
https://x.com/omarsar0/status/2070596184339562946
It would be good to have an official government statement about the risks they saw in Fable, how they are viewing defensive preparations in light of coming open weights Mythos-class models, & whether the worries are state actors, independent hackers, etc It’s important to know”
https://x.com/emollick/status/2072392345128239475
The new Sonnet 5 achieves Opus 4.8 level performance on Terminal-Bench for less than half the cost. Importantly for –yolo coders, this model is also significantly better at refusing hijack attempts in prompt injection attacks. Available in Cline now!”
https://x.com/cline/status/2072051144436928727
omg omg GLM-5.2 is beating fable. china is catching up” chill out and listen to Lisan: > slightly ahead of Opus 4.5 > behind GPT-5.2, Gemini 3 Pro and Opus 4.6″
https://x.com/scaling01/status/2072346101068238946
Microsoft just released a new GUI agent on Hugging Face Sico-Evolution jumps from 39.8% to 82.9% Task Success Rate Outperforming GPT-5.4, Claude Opus 4.6, and Claude Opus 4.7 All from a 4B parameter model”
https://x.com/HuggingPapers/status/2071951218889339131
best case: OSS surpasses Mythos, and the gov stops banning GPT-5.6/Fable. worst case: OSS surpasses Mythos, and then decides to stop being open source.”
https://x.com/Yuchenj_UW/status/2070554908139659400
Claude Fable 5 is available again in Cursor. It leads all models on CursorBench, but is the most expensive per task.”
https://x.com/cursor_ai/status/2072403323844428217
Claude Sonnet 5 is ready for you in the Agent Arena! In Agent Arena, we measure models on millions of real-world, long-horizon agentic tasks from a global community of users. Models can access web search, filesystem, and terminal tools to complete complex workflows. The”
https://x.com/arena/status/2072035566829568111
Claude Sonnet 5 ranks second only to Fable 5 on AA-Briefcase, our new agentic knowledge work benchmark, with a ~17x cost per task range across its five effort settings @AnthropicAI has released Claude Sonnet 5, the latest addition to the Claude Sonnet family. On AA-Briefcase,”
https://x.com/ArtificialAnlys/status/2072427328689619241
Even though I made this graph, it is also kind of wrong. Fable is guardrailed Mythos. If we use the Mythos date”
https://x.com/emollick/status/2071459383868117371
Fable 5 is back in the Arena! When it first debuted, Fable 5 ranked #1 in Agent Arena: our benchmark for real-world, long-horizon agentic performance. Agent Arena evaluates models on millions of real tasks submitted by a global community of users, with access to web search,”
https://x.com/arena/status/2072423538641031372
Oh my god, Sonnet 5 was MORE EXPENSIVE THAN FABLE to run the whole bench 💀”
https://x.com/theo/status/2072068395529576912
The talk about Mythos and cybersecurity was not, in fact, hype. (As anyone using Fable to do autonomous work has probably recognized)”
https://x.com/emollick/status/2072778376494895139
Claude Code turned every engineer into three. Now companies need more product thinkers | VentureBeat
https://venturebeat.com/ai/claude-code-turned-every-engineer-into-three-now-companies-need-more-product-thinkers
Open source AI is gaining traction due to the White House’s clampdown on Anthropic & OpenAI. “A lot of founders and developers have been burned by trying to build apps on top of these really advanced closed source models, like Fable for instance…” “… and then seeing those”
https://x.com/theinformation/status/2071700452605829433
An open-source OSINT agent for security research – OpenOSINT It’s like an AI investigation layer that lets you: examine emails, domains, IPs, phone numbers, GitHub profiles, etc. It exposes its OSINT tools through MCP. This agent decides what to run, chains findings, and”
https://x.com/TheTuringPost/status/2072126171270295892
Fable is very good, and having it taken away after getting early access delayed a few things I was working on and made me defer others until it returned But in my early access I also tripped the security guardrails a lot for non-obvious reasons. We will see how the new ones are”
https://x.com/emollick/status/2072165332370985026
Following conversations with the US government, we’ve updated our cybersecurity safeguards. The vast majority of coding work is unaffected. In the near term, the new safeguards will flag a slightly higher fraction of harmless requests than the previous Fable safeguards; we’re”
https://x.com/claudeai/status/2072402638247968855
“Agentic kernel optimization is the future of on-device inference” @xenovacom used Fable 5 to write kernels that pushed Gemma 4 to a massive 255 tok/s on WebGPU with M4. He shared the demo, so you can try in your browser!!”
https://x.com/googlegemma/status/2072416614188974274
I can personally attest: OpenClaude using GLM 5.2 is now performing on par with Claude Code powered by Opus 4.8.”
https://x.com/kevincodex/status/2070354383158861955
Fable, one prompt: “build an elaborate game that makes it feel like I’m a brilliant chess player without knowing anything at all about chess. It should make me feel like a grand master. Feel free to go as meta as you want but the more chess-y the better.”
https://x.com/emollick/status/2072547557968925093
Introducing Mixture of Agents 2.0 in Hermes Agent. Combine any provider’s models into a mixture of your own. Access your presets as if it were a normal model in Hermes. Big improvement in our soon-to-release HermesBench against opus and gpt-5.5 with MoA using Opus & GPT”
https://x.com/Teknium/status/2070615003674366277
This is the relevant section of my CLAUDE.md I’ll be real – I haven’t read it much. Just vibed out what I was looking for with Fable, and had it confirm it can use Codex for the things I care about I still find Codex to be WAY better at computer use, verification of UI/UX work,”
https://x.com/theo/status/2072482460122964067
while we cannot use fable 5 and gpt 5.6 will be screened before allowed to use the model, open source model builders are hard at work to close the gap. Ornith-1.0-397B from @ornith_, the best coding open source model.”
https://x.com/nathanhabib1011/status/2070469918475116750
Claude Fable 5 is once again available in Computer as an orchestrator model.”
https://x.com/perplexity_ai/status/2072433125104505226
New orchestrator model for Computer users (Pro and Max): Sonnet 5.”
https://x.com/AravSrinivas/status/2072031649693675810
Announcing the hosted X MCP – Announcements – X Developers
https://devcommunity.x.com/t/announcing-the-hosted-x-mcp/269558
WF2026: Autoresearch & Keynotes ft. Anthropic, Google DeepMind, Amazon AGI, Sonar, Arena, Recursive – YouTube
https://www.youtube.com/watch?v=4sX_He5c4sI
@theo instead we got sonnet 5😢”
https://x.com/kimmonismus/status/2072058904352002271
📣 Claude Sonnet 5 is now rolling out in @code. Give it a try!”
https://x.com/code/status/2072029026881859987
Autoresearch, Claude and Constrained Optimization
https://www.elliotcsmith.com/autoresearch-claude-and-constrained-optimization/
I asked Dario 3 years ago why AIs haven’t been able to use their vast knowledge across so many fields to connect two known ideas into a new discovery. It seems like AI did exactly this in the way it disproved Erdos’ conjecture aobut the unit distance problem by cleverly”
https://x.com/dwarkesh_sp/status/2072728758985892206
I knew it was going to be an insane nothingburger, because there’s currently a soft ban on frontier capabilities but I genuinely don’t understand why they didn’t call it Sonnet 4.8 or Sonnet 4.9, because this artificially nerfed piece of shit is not worthy of the 5.0 naming”
https://x.com/scaling01/status/2072039834529435674
I wouldn’t weigh too heavily on the Sonnet 5 benchmarks not being that much better than Opus. We’re entering an era where the effectiveness and quality of “working mind” is going to matter more and more. It’s a surprisingly sharp model, especially on long-horizon tasks.”
https://x.com/skirano/status/2072044693798412782
its already live in claude code 2.1.197″
https://x.com/scaling01/status/2071969195726659829
Notes (and a Pelican) on Claude Sonnet 5 – the new tokenizer makes it ~1.4x more expensive for English, ~1.33x more expensive for Spanish but roughly the same price for Simplified Mandarin”
https://x.com/simonw/status/2072068898648949184
Sonnet 5 already in the model selector. Release is imminent.”
https://x.com/kimmonismus/status/2071971743556628668
Sonnet 5 is a clear upgrade from 4.6, and the claude-api skill makes the migration even easier. This skill tunes prompts for Sonnet 5, recommends effort levels, and configures advisor mode.”
https://x.com/ClaudeDevs/status/2072018517898272844
sonnet 5 release kinda meh from personal usage pov. production usage people will be happy.”
https://x.com/dejavucoder/status/2072020732226478192
Sonnet 5 released for me!!”
https://x.com/kimmonismus/status/2072017872478470586
Sonnet 5: less for more $$$. Thanks, but I’ll skip this amazing deal, dear Claude!”
https://x.com/DeryaTR_/status/2072051617298293199
tl;dr: Sonnet 5 is cheaper per token, but more expensive per solved problem – and still lags behind Opus 4.8 in overall intelligence. Thats honestly disappointing and not a good release.”
https://x.com/kimmonismus/status/2072072593109315855
what is the fucking point of saying this for Opus specifically? all compared models are “reference”. these jerks are finding new ways to trigger me”
https://x.com/teortaxesTex/status/2072021520352772185
OpenAI priced GPT-5.6 Sol (largest Model) closer to Claude Opus 4.8 than to Anthropic’s restricted Mythos 5. Price war started. Sol comes in at $5 input / $30 output per 1M tokens. For comparison: Claude Opus 4.8: $5 / $25 Claude Mythos 5: $10 / $50 GPT-5.6 Terra: $2.50 / $15″
https://x.com/kimmonismus/status/2070577616210276664
That Wall Street Journal article about GLM catching up with Mythos (which is not true & the reporting doesn’t back up) is another one of those “everyone will ask me about it at every conference or meeting” articles. Big impact on the policy zeitgeist, even if not fully accurate.”
https://x.com/emollick/status/2071630972521705513
It would be very useful to understand more about the government safety concerns associated with frontier AI releases so we could (a) know what risks everyone will face if/when open source reaches Mythos class & (b) whether they are doing enough or too much to prevent those risks.”
https://x.com/emollick/status/2070272952210227622
Sonnet 5’s Runescape benchmark scores are big improvement over Sonnet 4.6’s, but outclassed by Pareto frontier neighbors like GLM 5.2 and Gemini 3.5 Flash.”
https://x.com/maxbittker/status/2072054926746779806
You really need your own benchmarks. If you are translating hieroglyphics, use Gemini 3.5 Flash. If you are running a vending machine use Opus 4.8. (This is one reason why I am skeptical of just swapping out models to optimize costs or generic benchmarks without testing first)”
https://x.com/emollick/status/2072697436963832023
Claude Sonnet 5 costs more than Claude Opus 4.8 on the Artificial Analysis Intelligence Index task, and 4.75X more than GLM-5.2. Token efficiency is important.”
https://x.com/Yuchenj_UW/status/2072070274300948497
Sakana Fugu Launches With 93.2 LiveCodeBench Score
https://www.implicator.ai/sakana-fugu-launches-with-93-2-livecodebench-score-after-claude-ban/
ALL of the “mythos-level” models that cost billions to develop are not publicly available: – Claude Mythos 5 – GPT-5.6 – Le Chaton Fat”
https://x.com/scaling01/status/2070622253109194919
Claude Sonnet 5 uses ~40% more output tokens per task than Sonnet 4.6 across the Artificial Analysis Intelligence Index, while achieving a 6-point score increase. At 69k output tokens per task on average, Sonnet 5 is one of the highest token users, behind only GPT-5.4 mini and”
https://x.com/ArtificialAnlys/status/2072062598187765893
Claude Sonnet 5 achieves 53 on the Artificial Analysis Intelligence Index, but without promotional pricing will cost more per task than Opus 4.8 We supported @AnthropicAI to evaluate Claude Sonnet 5 ahead of release: with max effort it improves 6 points over Sonnet 4.6 to”
https://x.com/ArtificialAnlys/status/2072062592923930666
Claude Sonnet 5 is now available in Cursor. On CursorBench, it’s a meaningful step up from Sonnet 4.6: 57% vs. 49%.”
https://x.com/cursor_ai/status/2072020786181988418
Here is my first assessment of Sonnet 5: Sonnet 5 is better than Sonnet 4.6. Who would have thought? But jokes aside: Unfortunately, it is weaker than Opus 4.8 across all evals. Why they nevertheless labeled the latest Sonnet 5 iteration with a “5”, even though “4.8” would have”
https://x.com/kimmonismus/status/2072027861385466123
I think they self-distilled just the right amount so that Sonnet 5 is worse than Opus 4.8 on every benchmark.”
https://x.com/z4y5f3/status/2072028918622622026
On FrontierCode (Extended), our benchmark for real-world engineering tasks that grades mergeability and quality, Sonnet 5 scores 53.8% and has a 57.6% pass rate (higher than Opus 4.8). Note: These relative rankings may change slightly with coming adjustments to FrontierCode.”
https://x.com/cognition/status/2072022781043028182
Sonnet 5 cost MORE than Opus 4.8 on the Artificial Analysis Intelligence Index”
https://x.com/theo/status/2072066764465393917
Grok 4.5, based on our 1.5T V9 foundation model, with Cursor data added in supplemental training, is now in private beta at SpaceX & Tesla. Early evals show performance close to, perhaps exceeding Opus. RL is continuing to significantly improve the model, and the Grok Build”
https://x.com/elonmusk/status/2071184354756477041?s=20
Salesforce employees are confused about why the company is promoting a competitor inside Slack
https://thenextweb.com/news/salesforce-employees-anthropic-claude-tag-slack-tension
This is what’s causing Anthropic to aggressively beg for govt protection (see below). Customers are finding cheaper alternatives. Keeping employees requires continuing ultra-rich secondaries ($$$) that are dependent on revenue growth. When you can’t win on the field go to DC.”
https://x.com/bgurley/status/2070427385237741797
Austria urges Europe to host Anthropic following US curbs on AI access | Reuters
https://www.reuters.com/business/austria-lobbies-eu-host-anthropic-ai-after-us-curbs-bloomberg-news-reports-2026-06-28/
Claude in Microsoft Foundry is now generally available, hosted on Azure. Azure customers get Claude Opus 4.8 and Claude Haiku 4.5, with Azure authentication, billing, and commitment retirement.”
https://x.com/claudeai/status/2071653958905467027
I feel like on X all you hear about is elaborate plans by firms to build their own AI stacks but in my experience companies are full of people who want access to Claude or ChatGPT and are pressuring their purchasing staff to get licenses so they can just use the tools they know.”
https://x.com/emollick/status/2070324736052084780
New analytics and cost controls are available for Claude Enterprise | Claude by Anthropic
https://claude.com/blog/giving-admins-more-visibility-and-control-over-claude-usage-and-spend
Sonnet 5 goes straight into the garbage bin > 1.2x more expensive than Opus 4.8 Max > 2x more expensive than GPT-5.5-xhigh > 5x more expensive than GLM-5.2 > 7x more expensive than Kimi-K2.6 > 57x more expensive than DeepSeek-V4-Pro”
https://x.com/scaling01/status/2072071305281540338
Update: I’ve joined @AnthropicAI and taken leave from the university. Excited to work with many talented, mission-driven people on the defining technology of our time.”
https://x.com/minilek/status/2072322757908664728?s=20
Claude Code Is Quietly Fingerprinting China-Linked API Routers – Vincent Schmalbach
https://www.vincentschmalbach.com/claude-code-china-router-fingerprint/
If you want to read an interesting AI thinking trace, try “I want you to suggest two poems that you think apply very well to the current state of GenAI models like you. Don’t just pick popular poems and back justify. Think hard about options first” in either GLM-5.2 or Opus 4.8″
https://x.com/emollick/status/2070384714691584239
Claude Desktop is now available on Linux (Ubuntu and Debian) in beta. Alongside the browser and terminal, you now get a first-class desktop experience with Claude Code, Claude Cowork, and chat on all paid plans.”
https://x.com/ClaudeDevs/status/2071988881717871065
Claude in Microsoft Foundry is now generally available, hosted on Azure. Prompt caching and extended thinking are supported today, with more capabilities on the way. Read more:
https://x.com/Azure/status/2071651695323492418
You can now run Claude models in Microsoft Foundry, hosted on Azure. Claude Opus 4.8 and Claude Haiku 4.5 are available through the Messages API with capabilities like prompt caching, thinking, and more.
https://x.com/ClaudeDevs/status/2071697437136486585
Sonnet 5 on Anthropic GitHub”
https://x.com/scaling01/status/2072014332104265884
This looks to good to be true. A 397B open source model on par or even outperforming Claude Opus 4.8? I need to check it out.”
https://x.com/kimmonismus/status/2070476402692919346
Claude Sonnet 5 is now available in Perplexity for Pro and Max subscribers. You can also select it as an orchestrator model in Computer.”
https://x.com/perplexity_ai/status/2072030042994160028
To keep pace with AI progress, we’re advancing how we study Claude’s economic impact. Hourly sampling and survey data show us how the cadences of life shape usage, what people produce with Claude, and how perceptions of AI’s impact may be changing.”
https://x.com/AnthropicAI/status/2070528961235575278
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