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Chat · OpenAI

Call it

Endpoint: POST /v1/chat/completions — set model to gpt-5.4-pro.
Full request and response reference: Quickstart.

IDs & aliases

Every alias resolves at the gateway and is disclosed back as requestedModelAlias in usage metadata. Routing variants also apply: gpt-5.4-pro:nitro picks the fastest provider serving these weights and gpt-5.4-pro:floor the cheapest (details).

Specs

Prices are public list rates at generation time and may lag the provider card; GET /v1/models and the portal’s pricing page are authoritative for billing.

Browse all models

Search and filter every model by modality, maker, capability and price.