Changelog

September 29, 2026#

• The documentation was restructured: separate pages for each endpoint, streaming, limits, pricing and each tool; added the FAQ and this page.
• Both error envelopes are documented (OpenAI, and Anthropic for /v1/messages), with the full list of codes, including 429 rate_limit_exceeded, 413, 422 generation_failed, context_length_exceeded, content_policy_violation.
• Request parameters are documented per endpoint.
• Claude Code: the required ANTHROPIC_MODEL setting was added.

September 2026#

• A limit on concurrent requests per account: when exceeded — 429 rate_limit_exceeded with Retry-After.
• Provider refusals come with clear codes: content_policy_violation, invalid_image, generation_failed, context_length_exceeded, unsupported_value, invalid_value.
• Request parameter policy: unsupported parameters are stripped, and those that change the shape of the response are rejected with 400 unsupported_parameter.
• /v1/messages errors come in the Anthropic envelope.
• Private models and personal prices: with your key, GET /v1/models lists models opened to your account.