New featureModels ·
GPT-5.5
GPT-5.5
What it does
OpenAI's GPT-5.5 became available across the builder.
Why it matters
The general-purpose default for agents where you'd rather not think about model choice at all.
The specs
- Context
- 1,050,000 tokens in, up to 128,000 out.
- Input
- Text and images.
- Actions
- Supported.
- Reasoning
- Fast ($$), Smart ($$$), or Smartest ($$$$).
- Plans
- Gold and Pro.
Tagged 'smartest' in the selector, and the sane default for an agent where you would rather not think about model choice at all — good enough at everything that the choice stops being the thing limiting your agent.