OpenAI
provider: 'openai'
The OpenAI provider reaches GPT models through OpenAI's API. The same models can be reached through OpenRouter.
Authentication
Get an API key from the OpenAI platform and pass it through extra.apiKey:
ts
{
provider: 'openai',
model: 'gpt-5-5',
extra: { apiKey: process.env.OPENAI_API_KEY },
}Configuration
| Field | Required | Description |
|---|---|---|
extra.apiKey | Recommended | OpenAI API key. If omitted, the OpenAI client falls back to OPENAI_API_KEY. |
extra.baseUrl | Optional | Override the API base URL — useful for Azure OpenAI or a compatible proxy. |
Models
| Model | model |
|---|---|
| GPT 5.4 | gpt-5-4 |
| GPT 5.5 | gpt-5-5 |
JSON output
GPT models use response_format: json_schema (strict: true) for schema-enforced JSON. See JSON output and schemas. temperature is not sent.