ModelReasoning - OpenRouter

Reasoning effort configuration. Omitted for non-reasoning models and dynamic router models.

Fields

Field	Type	Required	Description	Example
`default_effort`	OptionalNullable[components.DefaultEffort]	➖	N/A	medium
`default_enabled`	Optional[bool]	➖	Default reasoning enabled state when the client does not set `reasoning.enabled`.
`mandatory`	bool	✅	When true, reasoning cannot be disabled and effort “none” is rejected.
`supported_efforts`	List[Nullable[components.ReasoningEffort]]	➖	Allowed reasoning effort values for this model, in descending effort order (highest first). Null means no allowlist — all gateway effort values are accepted.
`supports_max_tokens`	Optional[bool]	➖	Present and `true` when the model accepts `reasoning.max_tokens` in requests (Anthropic-style) instead of or in addition to `reasoning.effort`. Omitted otherwise.