Cognition Labs reports Grok 4.6 (available in Devin) is a significant improvement over 4.5, surpassing GPT-5.6 Sol while trailing only Opus 5 and Fable 5.
Grok 4.6 (the 1.5T-parameter model with improved supervised fine-tuning and reinforcement learning) launched and is competitive at the frontier.
Grok 4.7 is the larger ~2.1T-parameter model. Initial training is complete. It is now in supplemental training with a large amount of SpaceX data. Elon has said it is significantly better than 4.6, should be ready in 3–4 weeks. It is reported to have better token efficiency.
Grok 4.7 will exceed all current models.
That said, Anthropic is a great company and will probably release improved models soon.
However, the SpaceX training corpus is so awesome & unique that I would be shocked if any model is better at real-world engineering than 4.7.
— Elon Musk (@elonmusk) August 12, 2026
Grok 4.6 reaches 1753 ELO https://t.co/fYS2EiZ0qt
— Elon Musk (@elonmusk) August 12, 2026
Tried Grok 4.6 on my bug bench an hour after release. 105 hidden bugs in two real repos, judged blind.
Grok 4.5: 17 (+10 non-planted)
Grok 4.6: 27 (+15 non-planted)
Fable 5: 29 (+2 non-planted)Looks like it may be my new default model. The best combination of time, value, and… https://t.co/h1QUmwkW6w pic.twitter.com/YzFcl2Coxe
— Paweł Huryn (@PawelHuryn) August 12, 2026
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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