Problem (one or two sentences)

The current option used by openrouter's grok-4-fast is "reasoning effort," but this option doesn't seem to work. In openrouter, this model can only have reasoning either turned on or off.

Reasoning can be enabled using the reasoning enabled parameter in the API.

Context (who is affected and when)

When selecting the openrouter provider and choosing the x-ai/grok-4-fast model

Desired behavior (conceptual, not technical)

The option to enable effort appears.

Constraints / preferences (optional)

No response

Request checklist

• I've searched existing Issues and Discussions for duplicates
• This describes a specific problem with clear context and impact

Roo Code Task Links (optional)

No response

Acceptance criteria (optional)

No response

Proposed approach (optional)

No response

Trade-offs / risks (optional)

No response