OpenAI unveiled its GPT-5.6 family, including Sol, Terra, and Luna variants, alongside a new enterprise tool called ChatGPT Work. The company claims Sol is 54% more token efficient for coding tasks and achieves a new state of the art at 80 on the Artificial Analysis Coding Agent Index, surpassing Anthropic's Fable 5 by 2.8 points. GPT-5.6 is priced at $5 input / $30 output per million tokens for Sol, and supports defensive cybersecurity activities like threat modeling and code review.
OpenAI's aggressive model launch with specific efficiency and benchmark claims directly challenges Anthropic's enterprise focus, intensifying competition for AI workloads.