Introducing GPT-5.5
OpenAI released GPT-5.5, its newest large language model, now available across the API, Codex, and ChatGPT. The model represents the next step in OpenAI's rapid GPT-5 family release cadence, building on the reasoning and agentic capabilities introduced in earlier GPT-5 variants. Full benchmarks and pricing details were published alongside the release.
openai.com ↗