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OpenAI
GPT-5.5
openai/gpt-5.5
Versatile GPT generation balancing reasoning, coding, and tool use for general workloads.
- Provider
- OpenAI
- Model ID
- openai/gpt-5.5
- Provider model ID
- gpt-5.5
- Context window
- Extended context · 1.05M tokens
- Inputs
- TextImages
- Output
- Text
- Verification
- Editorial
- Catalog position
- 14 of 32
ReasoningCodingAgentsMultimodalStructured output
Endpoint compatibility
Supported Nixo endpoints.
| Endpoint | Support |
|---|---|
| /v1/messages | Not supported |
| /v1/chat/completions | Supported |
| /v1/responses | Supported |
| /v1/models | Supported |
| /v1/images | Not supported |
| /v1/audio/speech | Not supported |
| /v1/embeddings | Not supported |
| /v1/rerank | Not supported |