@ai-sdk/openai

openai: Preserve valid JSON string tool arguments and serialize BigInt and cycles in tool calls and results, retaining malformed argument replay fallbacks

Forward languages and keywords transcription hints as repeated multipart fields instead of silently dropping them. Warn when these REST-only options are supplied to streaming transcription.

Support promises and synchronous or asynchronous callbacks in provider API key and token settings. Resolve credentials per authenticated request while preserving existing authentication behavior and synchronous credential serialization.

Introduce a model entry contract with named capability sections and request configuration. Consolidate the OpenAI and Anthropic model catalogs so existing request behavior and generated capability documentation use the same source of truth. Catalogs also declare the provider options each provider accepts and which models support them.

openai: Send native JSON input and prompt cache keys to Decisions

openai: Map top-level reasoning to efforts supported by GPT-5.x models instead of sending unsupported values that OpenAI rejects with a 400. max is now only sent on the Responses API, and GPT-5.6 on Chat Completions sends reasoning_effort: 'none' when function tools are used, since it rejects function tools with reasoning. A warning is emitted when a reasoning level was requested.

Map the top-level reasoning option consistently across providers