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GPT-5.6 Sol math proof and agent capabilities
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OpenAI's GPT-5.6 Sol demonstrated advanced reasoning and agent capabilities, including proving a 50-year-old unsolved math problem using 64 subagents and autonomously winning a complex video game over 5 hours. The model also outperformed competitors in identifying security vulnerabilities in code pull requests.
- GPT-5.6 Sol Ultra proved a 50-year-old mathematical problem using 64 coordinated subagents in under one hour
- GPT-5.6 Sol in Codex autonomously won Slay the Spire 2's daily challenge after 5 hours of complex decision-making with randomized factors
- Grok 4.5 and GPT-5.6 outperformed Anthropic models at detecting security vulnerabilities in pull requests
- Math proof represents first major breakthrough using a public model rather than experimental LLMs
[BSKY]bluesky2
This was one of those impressive AI thresholds for me. I gave GPT-5.6 Sol in Codex control over my computer, and asked it to win the daily challenge for the game Slay the Spire 2 (randomized factors, so can't cheat). Its a complex game.
This time OpenAI announced a novel math proof for a 50 year old problem using a public model (most of the other big math breakthroughs have been with experimental LLMs). GPT-5.6 Sol Ultra, using 64 subagents in just under one hour.