xAI: Grok 4.1 Fast
By X Ai
Released: 2025-11-19
X AI Grok 4 1 Fast, developed by xAI, features 2,000k-token context window. Grok 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) Available at $0.2/1M tokens.
Visit xAI: Grok 4.1 FastAI-Powered
Leverages advanced AI technology to deliver cutting-edge capabilities and results.
Fast & Efficient
Optimized performance ensures quick results without compromising on quality.
Purpose-Built
Specifically designed for llms tasks and workflows.
X Ai Model Timeline
2,000k tokens context
2,000k tokens context
256k tokens context
256k tokens context
131k tokens context
131k tokens context
131k tokens context
131k tokens context
Specifications
AI Evaluation
Combines language understanding with search capabilities. Excels at finding and synthesizing information from various sources.
Pros
- Competitive pricing ($0.2/1M)
- Massive 2,000k token context
- Advanced logical reasoning
- Agent-ready with tool use
Cons
- Speed/quality trade-off
- API integration required
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