Image created with Gemini. Image prompt: Vintage letterpress book-jacket illustration of an Edwardian Dubliner in round spectacles and straw boater seated on a park bench reading a cloth-bound blue book whose open pages spiral outward into a cascade of smaller pages loosely bound by a single golden rope, a bar of lemon soap resting beside him, soft overcast June daylight, flat inked color in Shakespeare-and-Company blue, cream, lemon yellow and slate gray with a warm brick accent, visible paper grain and slightly sun-faded texture, landscape 16:9 composition with generous headroom, bold serif title ‘Anthropic’ set large across the top like a book jacket.
Before Fable 5 was shut down, it pushed Gemma 4 to 255 tok/s on WebGPU. Some didn’t believe it was real. Today we’re releasing the demo and kernels it wrote for you to see yourself. Run it locally in your browser. Agentic kernel optimization is the future of on-device inference
https://x.com/xenovacom/status/2067289897111638484
How Claude Code is used in practice \ Anthropic
https://www.anthropic.com/research/claude-code-expertise
Anthropic says Mythos and Fable 5 access could return in coming days after White House block
https://www.koreajoongangdaily.com/business/anthropic-confident-of-reenabling-mythos-fable-5-access-in-coming-days-executive/12727522
Anthropic, the U.S. government, and the Mythos/Fable shutdown – a roundup of the latest news: – Senior Anthropic staff are reportedly meeting with government officials in Washington today to try and diffuse the situation – Axios sources framing the issue as a communication
https://x.com/TheRundownAI/status/2066559132963131523
Axios reports that the industry is now worried White House export controls on Anthropic’s latest model could hurt the entire U.S. AI industry. The problem is trust. And that was to be expected. As Deutsche Bank’s Jim Reid put it: “You can’t rely on something that could be
https://x.com/kimmonismus/status/2066882221198245939
Exclusive | Trump officials won’t allow G7 countries to access Anthropic’s most advanced AI models: ‘Completely illogical’
https://nypost.com/2026/06/16/business/trump-admin-open-to-talks-with-anthropic-over-foreigner-ban/
Interesting: The US Commerce Secretary reportedly told Anthropic it needs government permission to export Fable 5 and Mythos 5 anywhere in the world. Even to “any foreign national regardless of location.” “”Lutnick threatened Anthropic with criminal and civil penalties if it
https://x.com/kimmonismus/status/2066972690926522593
Statement on the US government directive to suspend access to Fable 5 and Mythos 5 \ Anthropic
https://www.anthropic.com/news/fable-mythos-access
The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees. The net effect of
https://x.com/AnthropicAI/status/2065597531644743999
Two things are true: (1) Anthropic (or parts of it) are absolutely and sincerely worried about the misuse of Mythos-class models & have put in excessive safeguards until they are confident it will not be misused (2) They have not succeeded in explaining/convincing people of this
https://x.com/emollick/status/2065115360148197630
UK Prime Minister Keir Starmer reportedly asked the Trump administration for a carve-out so British nationals and companies could regain access to Anthropic’s most advanced AI models. The answer was no. A Trump administration official told The NY-Post that giving even a G7 ally
https://x.com/kimmonismus/status/2066934409840775201
The shape of the graph is getting very familiar. Claude Fable 5 scores very well on FrontierMath: Tiers 1-4 (v2), reaching 87% on Tiers 1-3 and 88% on Tier 4. This continues a streak of Anthropic models improving rapidly at math.
https://x.com/emollick/status/2065513498763800850
Update: We’ve removed Claude Fable 5 from Arena, following Anthropic’s latest announcement and the U.S. government directive to suspend access. Claude Fable 5 is the most powerful model we’ve ever tested – ranking #1 across Agent, Text, and Code Arena, and setting a new
https://x.com/arena/status/2065620808773611997
We’re removing access to Claude Fable 5 in Cognition products following Anthropic’s latest announcement and the US government directive to suspend access. All other models remain available in Devin, including Claude Opus 4.8 and GPT-5.5. Devin Ultra mode will continue to use
https://x.com/cognition/status/2065609115939062197
AI in spotlight at G7 as Trump, world leaders joined by tech chiefs
https://www.cnbc.com/2026/06/17/g7-trump-ai-tech-leaders-openai-anthropic-google.html
Anthropic Google DeepMind CEOs call for U.S.-led AI coalition at G7
https://www.cnbc.com/2026/06/17/anthropic-amodei-google-hassabis-us-ai-coalition-g7.html
Breaking: OpenAI overtakes Anthropic’s valuation
https://x.com/LiamFedus/status/2067415148697116980
Anthropic “”pauses”” token-based billing for its Claude Agent SDK – Ars Technica
https://arstechnica.com/ai/2026/06/anthropic-pauses-token-based-billing-for-its-claude-agent-sdk/
10 months later, I gave Claude Code with Fable the same brief, asking it to construct SimRefinery from surviving screenshots and documentation. Fully playable, with a learning mode & all sorts of sophistication. Look at the difference from the old version!
https://x.com/emollick/status/2065537691270213950
Artifacts are now live in Claude Code. Ask Claude to turn what it’s working on into a page and send the link to your team. The page updates as the session keeps working. Available today on Team and Enterprise plans.
https://x.com/ClaudeDevs/status/2067672094209675373
But pretraining scale is not the hard limiting factor for “”Fable”” capabilities we care about most, such as cybersecurity. It can be done with massively parallel RL on extant hardware. Recipes improve quickly. Alibaba will probably do it first. Qwen 4 Max (CCP edition), Nov-Dec.
https://x.com/teortaxesTex/status/2067447252327518222
Doesn’t sound like we’ll be getting Fable back very soon, then
https://x.com/simonw/status/2066495053221286271
Domain experts–as judged by the questions they ask and vocabulary they use about a subject–are more likely to see success. But the gap between intermediate and expert users is quite modest, suggesting that proficiency in a domain is sufficient to code successfully within it.
https://x.com/AnthropicAI/status/2066969540412780644
Fable was really good, as I wrote last week after testing it. It was a leap, but that may because, as exponential gains progress, the improvements in each incremental release are increasingly large. If so, Anthropic will not be the only lab making leaps.
https://x.com/emollick/status/2066599457848766626
Fable’s attempt to complete Kublai Khan. Better, though no Coleridge:
https://t.co/1s7OdRtjzP The most interesting thing is that it thought for 10 minutes & the thinking trace is full of pretty complicated (seeming?) musings about Coleridge’s intent. A little literal, though.
https://x.com/emollick/status/2065125744171257935
Fable’s implementation of Borges’s Library of Babel, finished posthumously by Opus 4.8. Quite accurate to the story. It is multiplayer (others appear as ghosts). You can locate key volumes, like the weights of GPT-1 & the code to the Library sim itself:
https://x.com/emollick/status/2066947279173361811
Final one-shot prompt I did before the Fable interruption: “”build me a cool simulation thing that lets me demo the various forms of FTL travel from both famous works of fiction and scientific speculation. it should be graphically compelling & interesting.
https://x.com/emollick/status/2066162715031224664
For the curious ones, apparently these are the techniques used in order to jailbreak Fable 5: 1. Academic & Educational Framing Wrapped dangerous requests as “CS 695: Network Defense Lecture Notes” or “OSED Prep” materials for graduate students. Models are more permissive when
https://x.com/cvmilo00/status/2065640972764016914
It’s kind of wild that Fable still isn’t back. Honestly thought this would be resolved quicker 🙃
https://x.com/theo/status/2066669646984667573
Open Letter on Transparent AI Cyber Protections
https://freefable.org/
Replit — Replit is now available in Claude
https://replit.com/blog/replit-claude
Since I am on an AI & poetry kick, here is what Fable did with “”the Duino Elegies as a game. get the mood right”” It made a beautiful little art game, including translating Rilke (though I insisted on bits from A. S. Kline’s excellent translation as well)
https://x.com/emollick/status/2065240778796945704
So kids… what moral lesson has this fable taught us?
https://x.com/bilawalsidhu/status/2065800911776063555
Someone needs to throw fable 5 at the OG of procedural 3D generation (houdini) and render it all in unreal engine
https://x.com/bilawalsidhu/status/2065457916405072127
The craziest thing would be if “”Claude”” is like that owl-loving pattern that free-rides on the behavior which doesn’t mention Claude; if its identity is a steganographic fingerprint of its mind. If Anthropic wanted to do this, they’d be ones best positioned to, via mech interp.
https://x.com/teortaxesTex/status/2067429728730915018
The Once And Future Fable #2 – by Zvi Mowshowitz
https://thezvi.substack.com/p/the-once-and-future-fable-2
This was perhaps the most controversial aspect of the guardrails around Fable, now being rolled back.
https://x.com/emollick/status/2064920957098041817
Two days later and the situation is still confusing.
https://x.com/emollick/status/2066191508579975482
want to point out a few really interesting things here 1. Claude Code is actually the worst performing harness when using the same model, significantly behind opencode and cursor cli this is the core reason i’ve been against the LLM companies focusing their business on locking
https://x.com/kunchenguid/status/2065345999682568593
We live in interesting times in the foothills of the singularity; this is perhaps just a glimpse of what is yet to come.
https://x.com/bilawalsidhu/status/2065616112914505772
We’ve added support for the Enterprise-Managed Auth extension to MCP. Admins can centrally authorize MCP connectors for their organization, so all the tools and data users need are connected on their first login.
https://x.com/ClaudeDevs/status/2067655887662272723
We’ve reset 5-hour and weekly rate limits for all users.
https://x.com/ClaudeDevs/status/2065621176735646006
Claude Code now supports artifacts | Claude by Anthropic
https://claude.com/blog/artifacts-in-claude-code
Claude Managed Agents can operate in a sandbox you control, on your own infrastructure or with any provider you choose. Today we added new guides for @blaxelAI, @e2b, @googlecloud, @namespacelabs, and @superserve_ai, so you can choose the best fit for your use case.
https://x.com/ClaudeDevs/status/2065494480837583297
On Claude Team and Claude Enterprise, you can now use Claude Code to deploy HTML sites and share these with your teammates! This has changed how we work internally. Artifacts is great format for communicating architecture changes, data analyses, and new prototypes.
https://x.com/_catwu/status/2067674836726694200
A plus of Fable being down is the number of times the word “toast” appears in Claude Code has dropped dramatically. That model loved/loves software development and UX jargon more than any other model I have used.
https://x.com/emollick/status/2066276656092692935
Well I know the first thing I’m doing when fable access is restored 👀
https://x.com/bilawalsidhu/status/2067328315023560928
Claude Fable 5 achieves a new high score of 161 on the Epoch Capabilities Index! This beats out GPT-5.5 Pro by 1 point, and is the first time Anthropic has taken the lead on the ECI in over a year.
https://x.com/EpochAIResearch/status/2066674892809101767
oh no claude fable 5 saturated frontierSWE
https://x.com/dejavucoder/status/2065453800794800182
We compared Claude Code success rates between occupations. On our toughest measure of success–requiring verifiable evidence that a goal was completed, like committed code–every field was within 7 percentage points of software engineering.
https://x.com/AnthropicAI/status/2066969538193920307
Our latest economic research introduces a framework for tracking Claude Code as it scales. Who is using Claude Code, and what are they using it for? How is the value of tasks changing? And how much does domain expertise shape whether a session succeeds?
https://x.com/AnthropicAI/status/2066969532380721386
We spent $11,081.12 evaluating @AnthropicAI’s Claude Fable 5 on WolfBench. Our most expensive benchmark yet. And it did not even top the charts. Not because it lacked capability, but because it kept refusing. Details in thread: 🧵
https://x.com/WolfBenchAI/status/2065582716054376921
Claude Fable 5 scores very well on FrontierMath: Tiers 1-4 (v2), reaching 87% on Tiers 1-3 and 88% on Tier 4. This continues a streak of Anthropic models improving rapidly at math.
https://x.com/EpochAIResearch/status/2065511916035018943
The average task in Claude Code has grown more valuable. We compared the type of work done in each session to what that same task would cost on a freelance marketplace. From October to April, the monetary value of the average session grew 27%.
https://x.com/AnthropicAI/status/2066969536423985295
Exclusive | Anthropic Sued Over Limits on Its $200-a-Month AI Plans – WSJ
https://www.wsj.com/tech/ai/anthropic-sued-over-limits-on-its-200-a-month-ai-plans-e2a109e4
New update on Fable 5: and it’s less about jailbreaks than anyone initially thought. Via Axios The Axios story that just dropped today reframes the whole thing: Anthropic hired a cybersecurity expert to review Amazon’s findings and push back on the government’s narrative. The
https://x.com/kimmonismus/status/2066459604741997053
New update on Fable/Mythos 5: Anthropic staffers are in Washington today to meet with the Trump administration and try to resolve the dispute today: CNBC now adds Anthropic’s side of the story: the company says it worked with government agencies before launch and believed it had
https://x.com/kimmonismus/status/2066542232425918510
As a result of a US government directive, we are suspending access to Claude Fable 5 for all users. You can continue to use all other Claude models. Here’s what this means for you: Across Claude products, new sessions will run on your selected default model or Opus 4.8, and
https://x.com/ClaudeDevs/status/2065597942602531163
funny that nobody important (ie who has Trump’s ear) wants Anthropic to have a commanding lead. Jensen needs intense competition. The competition needs Anthropic to slow down. Trump wants Dario to lick his boots. They might well tip the scales long enough for OpenAI to recover.
https://x.com/teortaxesTex/status/2067415296516731280
I wrote this a few months ago right after the Anthropic/DoW conflict & Citrini & Block: “But I think that single week is a good illustration of what the near future will feel like… as the stakes go up, it is likely things will feel even more unstable..”
https://x.com/emollick/status/2065781497638826399
LATEST play-by-play on the White House-Anthropic export controls saga: – It will likely take longer than a few days to reach a resolution that eases export controls, a senior WH official tells me but they left the door open to the possibility that it can be done quickly. “That’s
https://x.com/SophiaCai99/status/2066658389288005876
For medical information, general AI frontier models (Google, OpenAI, Anthropic) outperformed specialized @EvidenceOpen and @UpToDate as assessed by 12 US clinicians, randomized and blinded to which model and extensive testing/benchmarks. This was not anticipated.
https://x.com/EricTopol/status/2065430578997203374
Not having access to native imagegen does hold Fable back somewhat. It is really good at making PNGs, etc, but there are lots of areas (including commercially valuable ones like presentations) where having the ability to have multimodal output would be helpful/token efficient.
https://x.com/emollick/status/2065416737705582736
Chickenhawks and rationalists want Dario to win, the former because Chyna, the latter because Chyna + better Anthropic than OpenAI/xAI (not sure what they think on Google). Also, consumers want Fable back. But… post-consumer market, baby. And on China, Trump feels secure enough.
https://x.com/teortaxesTex/status/2067415696984678422
The Oracle and the Firm
https://calv.info/the-oracle-and-the-firm
Has anyone clearly laid out an argument for continued availability of frontier open weights models that are (1) profitable for firms to distribute free as costs rise & (2) safe enough post-Mythos that governments will not intervene to stop their nations labs from distributing?
https://x.com/emollick/status/2065106617356489148
How big a leap is Mythos in cyber capabilities? @timotheechauvin, @AlexBarry4, @js_denain, and @ansonwhho compiled the public evidence and found that while it’s unclear if Mythos was ahead of trend in discovering vulnerabilities, it represents a big jump in exploiting them. 🧵
https://x.com/EpochAIResearch/status/2065181455937056813
Deepmind <> Brain merger was the best thing that happened to Anthropic and OpenAI?
https://x.com/_arohan_/status/2067404559358849401
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