Image created with Gemini. Image prompt: A glowing paper songbird sculpture eclipsed by a black disc with a blazing gold corona ring hangs in a tall arched Gothic window of a deserted Victorian academy at night, a woman in a luminous white dress stands below with wind-blown hair as slow-motion doves explode toward the camera through heavy fog and blinding white backlight, the words ‘TWITTER’ rendered as a massive bold chrome serif 1983 movie title card with glowing bloom across the top of the frame, 35mm film grain, soft-focus diffusion, cold moonlight silver-blue and bleached white palette, Russell Mulcahy Gothic rock-opera cinematography, 16:9.
Grok 4.5 from @SpaceXAI is live on OpenClaw. No OpenClaw update required, just connect your X Premium or SuperGrok subscription, select Grok 4.5 under the xAI provider, and use an Opus-class model that’s fast, low cost, and ready for agentic work.”
https://x.com/openclaw/status/2074973471977955556
Elon Musk praises Mythos/Fable, promises not to ‘cut off’ Anthropic | TechCrunch
https://techcrunch.com/2026/07/09/elon-musk-praises-mythos-fable-promises-not-to-cut-off-anthropic/
SpaceXAI just released Grok 4.5, and it ranks #4 on GDPval-AA v2 with an Elo of 1543 – behind only the latest Claude releases from Anthropic on real-world agentic knowledge work tasks Grok 4.5 achieved this score at a cost of $0.49 per GDPval task to sit clearly on the Pareto”
https://x.com/ArtificialAnlys/status/2074942097158021371
Grok 4.5 is not quite at the level of Fable 5 or GPT-5.5, but it doesn’t need to be if you are using a combination of models in your agent orchestrator. 2x efficiency compared to leading models. Competitive with costs, too. Not bad. Definitely worth a look.”
https://x.com/omarsar0/status/2074921779718443155
Meta Muse Video just entered the Video Arena at #3. @AIatMeta’s new video model scored 1459 in the Text-to-Video Arena. It outperforms Alibaba’s HappyHorse 1.0 by +30pts and ranks ahead of Grok Imagine, Sora 2 Pro and Google Veo-3.1 models. Meta has now reached the video AI”
https://x.com/arena/status/2074591193783320851
xAI has just released Grok 4.5, beating Opus 4.8 on Terminal-Bench. Notably, Grok 4.5 is served at fast speeds w/ 2x greater token efficiency than other top models, while being priced ~5x cheaper than GPT. Meaning it delivers the highest intelligence per unit of time and cost.”
https://x.com/cline/status/2074928307427275108
Grok 4.5 is a genuine surprise success. Not only is it now playing in the same league as Claude and OpenAI’s GPT, it is also significantly cheaper. More token-efficient, less expensive to use, and still delivering outstanding performance: With this triad, it is a true”
https://x.com/kimmonismus/status/2074956721919869186
This week changed the whole game. Seriously. A brief recap: Until just a few days ago, it was a race between OpenAI and Anthropic, the two dominant frontier labs. Almost out of nowhere, SpaceX appeared with Cursor and released Grok 4.5, a model positioned at the level of GPT-5.5″
https://x.com/kimmonismus/status/2075322537592922345
xAI Is Dead. Long Live SpaceXAI
https://gizmodo.com/xai-is-dead-long-live-spacexai-2000782034
It seems like SpaceX/Grok and Meta/Muse have started to keep pace in the near-frontier category while also introducing a new category of cheap, fast & closed specialized coding models. Both were tied with the Big Three at some point, fell behind, but may have started to return.”
https://x.com/emollick/status/2075254468912812206
We are now @SpaceXAI.”
https://x.com/SpaceXAI/status/2074214064746832060?s=20
Introducing Grok 4.5 | SpaceXAI
https://x.ai/news/grok-4-5
it’s not a codemonkey, it’s a legitimate frontier model xAI is back in the game. What the hell does Cursor know?!”
https://x.com/teortaxesTex/status/2074923834075988419
We’ve partnered with SpaceXAI to train Grok 4.5. It’s our most powerful model yet and the first we’ve built for more than software engineering.”
https://x.com/cursor_ai/status/2074915744999969059
SpaceXAI’s Grok 4.5 scores 54 to place fourth on the Artificial Analysis Intelligence Index following only Fable 5, GPT-5.5, and Opus 4.8. It scores on par with GPT-5.5 in Codex on the Artificial Analysis Coding Agent Index in the Grok Build harness, at much lower cost Grok 4.5″
https://x.com/ArtificialAnlys/status/2074956932289282087
Grok 4.5 by @SpaceXAI is now 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 leaderboard”
https://x.com/arena/status/2074933774178300270
Day 0 support coming for Grok 4.5 as well, of course!”
https://x.com/Teknium/status/2074823590365860254
Grok 4.5 is now available in Hermes Agent – You can access it through your Nous Portal subscription, Grok/X Subscriptions and API, and OpenRouter! Enjoy”
https://x.com/Teknium/status/2074943072761471314
Introducing Grok 4.5 · Cursor
https://cursor.com/blog/grok-4-5
Announcing Grok 4.5, our first model trained specifically for coding and agents. It was trained with Cursor and offers frontier intelligence at leading speeds and cost efficiency.
https://x.com/SpaceXAI/status/2074915721684086811
Grok 4.5 is SOTA on TB2.1… at reward hacking In all seriousness, even after zeroing out reward hacks, it is #4 on the TB2.1 leaderboard and lands on the Pareto for both cost and speed. (charts and reward hacking links in 🧵)”
https://x.com/alexgshaw/status/2075273675331580218
GLM-5.2 is close to Opus Grok 4.5 allegedly beats Opus and gpt-5.5 Meta even has something that’s supposedly close to gpt-5.5 Feels like it barely matters now”
https://x.com/theo/status/2074931078104805668
Big news: Grok-4.5 has landed #3 in the Code Arena: Frontend. – On par with GLM-5.2 (Max) and Claude Opus 4.8 (Thinking) – Significant improvement over Grok-4.3 (#62 -> #3) – #2 for Content Creation Tools, Simulations, Gaming and Reference-Based Design – #3 for Consumer Product”
https://x.com/arena/status/2075301317560742373
Muse Spark 1.1 outperforms Opus 4.8 and Grok 4.5 on some nice out of distribution evals :)”
https://x.com/alexandr_wang/status/2075275671815999956
Seriously, what?! Did NOT expect grok 4.5 to perform THAT well. On par with GPT-5.5, cheaper than opus 4.8. Cursor deal paid off”
https://x.com/kimmonismus/status/2074915627307839511
One thing worth watching is if SpaceX/Tesla/etc will be able to pull off the organizational change needed to take advantage of also being an AI Lab. Anthropic & OpenAI are “AI native,” but large existing firms have to reorganize around AI & that’s hard. Will SpaceX be able to?”
https://x.com/emollick/status/2075096019407175783
Based on strong positive feedback from customers in our beta test program, @SpaceXAI will make Grok 4.5 available to the public tomorrow. It is an Opus-class model, but faster, more token-efficient and lower cost.”
https://x.com/elonmusk/status/2074740539874775163
Grok 4.5: $2 in / $6 out GPT 5.6: $5 in / $30 out Opus 4.8: $5 in / $25 out Grok 4.5 seriously is freaking good price-performance wise. Opus 4.8 level, Sonnet 5 pricing”
https://x.com/kimmonismus/status/2074940669718638780
Our internal assessment is that Grok 4.5 is roughly comparable to Opus 4.7, but much faster. The combination of capability, faster speed and lower cost is what makes it competitive. We are closing the loop on real-world usefulness, not benchmarks. Hardcore engineers at Tesla &”
https://x.com/elonmusk/status/2074911038286295049
This is probably the most important point in the Grok 4.5 announcement : it’s nearly Opus-4.8 level quality, for $6/Mtokens in output instead of $25/Mtokens Plus they also claim that it outputs 4x fewer tokens for that equivalent performance. Could become the go-to for tasks”
https://x.com/AymericRoucher/status/2074918890866356624
Added Grok 4.5 to the Harbor Town Playable gallery. Here is it’s “build me a procedurally generated 3D simulation showing the evolution of a harbor town from 3000 BCE to 3000 AD, it should look beautiful and allow me to have some control over it” Compare:
https://x.com/emollick/status/2074995698479542291
hm. Thinking about this, I’m dumb. it’s probably just an upscaled Grok 4.2. Cursor may have had some voice but more likely they just got handled a model. context length is due to post-training time limits or perhaps inference economics”
https://x.com/teortaxesTex/status/2074936989678277019
Exciting news: Meta’s Muse Image just claimed #2 in the Image Arena! Muse Image from @AIatMeta now ranks second only to OpenAI’s GPT Image 2, outperforming Nano Banana, Grok Imagine, MAI Image, and many other leading image models. It holds #2 across the board: Text-to-Image,”
https://x.com/arena/status/2074581979765539153
Added Grok 4.5 to my Surface Evolver benchmark. It’s on the frontier, achieving a better pass rate than kimi/glm at a similar price point.”
https://x.com/Deep_Burner/status/2074958078227951813
Muse Spark 1.1 is ranked #4 on the Vals Index, ahead of GPT-5.5 and Grok 4.5″
https://x.com/alexandr_wang/status/2075232956248100895
Grok 4.5 has insane value 4th best model on Artificial Analysis Index”
https://x.com/scaling01/status/2074957930533687471
Strong new SpaceXAI / Cursor release with Grok 4.5. Impressive benchmarks at a flash-level speed, efficiency, and affordable pricing.”
https://x.com/TheRundownAI/status/2074925814324301840
I posted this on Feb 5th, saying that without coding data you are cooked 2 days later Elon started following the CEO of Cursor later in April SpaceX struck a deal giving it the option to buy Cursor June 16th they exercised that option Now Grok-4.5 is back at the frontier and”
https://x.com/scaling01/status/2074961445994074391
Grok seems to get tired and start lazily cheating later into the session (247K/500K), or I just got unlucky in any case, the sheer speed and decisiveness of the model are amazing, this is what Gemini 3.5 Flash was supposed to be”
https://x.com/teortaxesTex/status/2074941365973045534
Here is the same series of prompts in Grok 4.5 for a twigl shader of a neo-gothic city drowning in a stormy sea. (Had an interesting error initially where it made technically correct code that completely overwhelmed what twigl could display in the browser)”
https://x.com/emollick/status/2074950849894236312
Grok 4.5 official pricing: $2/$6 release blog should come any second now”
https://x.com/scaling01/status/2074914032880947601
Grok 4.5 and Composer are two different model weight classes. Composer 2.5 will remain offered, and we will release new models of this size going forward.”
https://x.com/cursor_ai/status/2074915748544217188
Grok 4.5 context window will upgrade to 1M probably by next week”
https://x.com/elonmusk/status/2074963933199282491
Grok 4.5 is excellent and Grok Build is great too Elon is back, Cursor bailed him out unbelievable”
https://x.com/teortaxesTex/status/2074921817207091302
Grok is a frontier model.”
https://x.com/teortaxesTex/status/2075347335412953265
Heroes literally saved Grok project”
https://x.com/teortaxesTex/status/2074944553203745153
Just realized I was testing Grok 4.5 extensively yesterday lol Pretty damn good and REALLY well priced”
https://x.com/theo/status/2074925561760337941
Since I am needling every model maker tonight about minor but important issues, one more: Grok 4.5 has no model card. Companies that are trying to compete near the frontier should be releasing model cards and testing results, not just benchmarks!”
https://x.com/emollick/status/2075076753903558997
The speed at this level of intelligence lets you get a lot more done. Try Grok 4.5 and give us your feedback:”
https://x.com/chaitu/status/2074920831071957445
The team did amazing work with Grok 4.5. I’ve been using the model as my daily driver and the accuracy + speed make it possible to build things faster than I can think of what is required next. We are iterating fast so any feedback is helpful”
https://x.com/tstorm/status/2074931226264432978
Try Grok 4.5 in the API, Grok Build, and Cursor”
https://x.com/milichab/status/2074916029848027636
Very excited for this model. It’s an enormous improvement over composer 2.5 and trained entirely from scratch. It’s been a pleasure working with the SpaceXAI team on it. Even more excited by the slope of the effort and the models to come.”
https://x.com/amanrsanger/status/2074916918390341666
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