OpenAI
GPT-5.5
OpenAI's newest frontier model. ChatGPT-subscription-only at launch; not exposed via API key. Default in Codex CLI for general reasoning.
At a glance
- Context
- 1.1Mtokens
- Input
- $5/ M tok
- Output
- $30/ M tok
- Released
- 2026-04-22
OpenAI
OpenAI's newest frontier model. ChatGPT-subscription-only at launch; not exposed via API key. Default in Codex CLI for general reasoning.