Models · The Decoder ·
OpenAI's GPT-5.6 Sol launches to rival Claude Mythos under government access rules it calls unsustainable
OpenAI has launched GPT-5.6 Sol, a new flagship model that it says outperforms Anthropic’s Claude Mythos 5 in coding benchmarks. The rollout is restricted by US government access rules, which OpenAI says are unsustainable.