xAI: Grok 4.1 Fast
xAIGrok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using the `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
ANALYSIS STATUS
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This model exists in our database, but we only publish political alignment results once its full analysis run is completed.
A full run currently requires 114 completed bill analyses.