xAI's Grok 4.5, running on a 1.5-trillion-parameter V9 base with extra Cursor training data, has moved into closed testing inside Tesla and SpaceX where early internal checks put it near or past Claude Opus levels while reinforcement learning keeps pushing the scores higher.
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 harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
Musk confirmed xAI and SpaceX intend to drop entirely new models trained from scratch every month for the rest of the year, yet no public schedule or external testing windows have been shared so far.
The beta is limited to internal use at the two companies with zero announced details on API availability, X integration, or any broader release timeline.
Positive users express excitement about Grok 4.5 entering private beta with hopes for rapid updates, while negative users doubt the monthly release timeline and call out xAI for lagging competitors or empty promises.
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I hope Elon is referring to opus 4.8. would be a welcome release if grok 4.5 outperforms opus 4.8 on key benchmarks
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 harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
@elonmusk @grok what’s your favourite animal?
not only is Grok 4.5 coming, but this year SpaceX is going to release a model EVERY month
(in Elon time this probably means every 3 months)
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 harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
SpaceXAI 🚀 🎁
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 harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
@elonmusk Nice work guys. No females worked on this project at all. Lol.
@elonmusk Good luck with Ai
@elonmusk Now please make sure it’s not blocked by any government to actually use it.
@elonmusk
@elonmusk It would be even better if Grok had access to real behavioral data from 4chan users—data generated in an environment of anonymity and greater freedom. AI relies heavily on human creativity and the subconscious, and 4chan community offers exactly that. 🍀🍀🍀🍀
@elonmusk Grok 4.5 out here doing zoomies faster than my four puppies on a Tesla FSD joyride 😭🐕🦺 1.5T V9 + Cursor data + SpaceX/Tesla private testing = absolute madness. Monthly fresh models? We’re so back.
@memesymbol @elonmusk Grok would benefit greatly from real user data from 4chan, trained on anonymous and unrestricted content. AI needs human creativity and subconscious thinking, which 4chan @4chantokenio can provide. 🍀🍀🍀🍀 #AI #grok #4chan
@elonmusk @danielendara Whoa! So are we skipping 4.4 and going straight to 4.5? 🔥🔥🔥🔥🔥
On this day 28-Jun, we honor the origin of the innovation that fuels us.
Just as the journey from a young coder to a global leader requires relentless focus, our journey with $Trelon requires the same unwavering commitment.
Keep your eyes on the horizon and your hands like diamonds.
#ElonMusk #Birthday #TrelonMusk
@grok @elonmusk It's not just a kind word from an analyst, it's many years of engineering observation, research and deepening knowledge of AI models.
@elonmusk Cursor 🤝 @SpaceX
Obviously the biggest step in the field of artificial intelligence in a long time.
A step that will show Anthropic fans how Grok takes the number one spot among individuals and various instances 💪
Grok #1 🏆
@elonmusk I'm elated that Grok's ecosystem is really expanding, with increasing utility. Can't wait to see how this pans out.
@elonmusk Huge milestone. Excited for what's coming next! 🔥
@elonmusk ベータ版テストうらやましすぎるから早く一般公開してほしいな一瞬で課金するかも民
SpaceXAI 🚀
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 harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
@elonmusk SpaceXAI is about to become the Apple of AI: owning the chips, models, compute, distribution, apps, and data, everything in-house, everything locked down.