xAI's fast agentic tool-calling model with a 2M context window; non-reasoning variant for low-latency responses
https://api.x.ai/v1 grok-4-1-fast grok-4.1-fast is listed for chat workloads and supports a 2.0M context window.
Check xAI's current endpoint status before integrating this listing. Use the alternatives table if the provider listing is unavailable.
We only found this grok-4.1-fast listing on xAI in the current catalog. Use the related models section for nearby alternatives.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | grok-4.1-fast | Check provider | 2.0M | Native | Credit-based |
| Model | Provider | Context | Access |
|---|---|---|---|
| grok-4.3 | xAI | 1.0M | Check provider |
| grok-3-mini | xAI | 131K | Check provider |
grok-4.1-fast is tagged for chat in this catalog.
grok-4.1-fast appears in the free model catalog for xAI, but its current endpoint availability should be confirmed with the provider before use.
The model ID shown in this catalog is grok-4-1-fast.
The listed free tier limit is Credit-based. Limits can change per account tier, so confirm against the provider dashboard.
The listed context window is 2.0M tokens with up to 32K output tokens.
grok-4.1-fast — free model from xAI.
For API keys, setup steps, and provider-level limits, see the xAI provider page.