# Grok 4.1 Fast Reasoning spatřen na Arena

Grok 4.1 Fast Reasoning je AI model od xAI, vydaný 2025-11-19. První zjištění 2026-09-11. Podle katalogů má kontextové okno 2 000 000 tokenů. 14 zdrojových odkazů.

- Typ: Zjištění
- Vývojář: xAI
- Potvrzení: Potvrzeno
- První zjištění: 2026-09-11T21:39:38.120Z
- Model: [Grok 4.1 Fast](https://alexgetman.com/cs/models/xai/grok-4-1-fast/)
- Kanonický: https://alexgetman.com/cs/signals/2026/09/11/grok-4-1-fast-reasoning/

## Zdrojové odkazy

- [Arena · leaderboards](https://x.ai/news/grok-4-1-fast)
- [models.dev · catalogue](https://models.dev/#grok-4.1-fast)
- [models.dev · catalogue](https://models.dev/#grok-4.1-fast-non-reasoning)
- [TrueFoundry · Azure catalogue](https://github.com/truefoundry/models/blob/main/providers/azure-ai-foundry/grok-4-1-fast-reasoning.yaml)
- [TrueFoundry · Azure catalogue](https://github.com/truefoundry/models/blob/main/providers/microsoft-foundry/grok-4-1-fast-reasoning.yaml)
- [OpenCode · discovery](https://opencode.ai/data/xai/grok-4-1-fast-reasoning)
- [OpenCode · discovery](https://opencode.ai/data/xai/grok-4-1-fast)
- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [Vertex AI · Model Garden](https://console.cloud.google.com/vertex-ai/publishers/xai/model-garden/grok-4.1-fast-non-reasoning)
- [Vertex AI · Model Garden](https://console.cloud.google.com/vertex-ai/publishers/xai/model-garden/grok-4.1-fast-reasoning)
- [models.dev · catalogue](https://models.dev/#grok-4-1-fast-non-reasoning)
- [models.dev · catalogue](https://models.dev/#grok-4-1-fast-reasoning)
- [Azure Foundry · lifecycle](https://learn.microsoft.com/en-us/azure/foundry/concepts/model-lifecycle-retirement?view=azureml-api-2)
- [models.dev · catalogue](https://models.dev/#grok-4.1-fast-reasoning)