OpenAI · OpenAI (GPT / ChatGPT)
GPT-5.5
CurrentDefaultReleased 2 months ago· Apr 23, 2026Multimodal model
Current flagship general-purpose model; strong coding, reasoning, writing, and agentic tasks. Tiered pricing above a context threshold.
- API string
- gpt-5.5
- Context window
- 1M ctx
- Knowledge cutoff
- Jan 1, 2026
- Tier
- Flagship
- Released
- Apr 23, 2026
Release & change timeline
1 event- Release
GPT-5.5 released
Current flagship; 1M context, $5/$30 per 1M tokens.
Part of the OpenAI (GPT / ChatGPT) version timeline. Catch Me Up — everything that changed across AI & smart home ↗