/v1; the SDK appends /chat/completions. Use catalog IDs: openai/gpt-5.5, not gpt-5.5. See model mapping.
resp.choices[0].message.content is the text and resp.usage the tokens. Streaming works as in the OpenAI SDK: stream=True or stream: true.
Privacy
On models with an attested build, the:confidential variant runs inside sealed hardware and returns attestation evidence:
:confidential model ID in GET /v1/models; request fresh evidence from Get attestation. See Privacy Levels.
Notes
- Nito also serves a stateless
POST /v1/responsesshim. Chat Completions is the primary surface. - A
429carriesRetry-AfterandX-RateLimit-*headers. See Rate Limits.
Related
Make Your First Request
Field by field.
Chat Completions
The endpoint.

