xAI: Grok 4.1 Fast
Analysis Summary
xAI: Grok 4.1 Fast sits in the Professional tier on our leaderboard, ranked #10 of 565 published models on overall intelligence. At $0.200 input and $0.500 output per 1M tokens, it is among the most expensive on the market. It offers an exceptionally large context window suited to long-document workflows and supports tool use, function calling, vision, and reasoning.
Editorial notes
Grok 4.1 Fast from xAI pairs strong reasoning and agentic scores with a 2M token context window and very low pricing at $0.20/1M input, offering exceptional value for large-scale business workflows.
Assessed May 31, 2026
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How xAI: Grok 4.1 Fast compares
XAI: Grok 4.1 Fast ranks #66 of 370 AI models we track for overall intelligence, #82 of 307 for coding, #62 of 282 for agentic tasks. Its 2M-token context window is larger than 100% of the models we list. At $0.20 per million input tokens it is cheaper than 53% of comparable models.
About xAI: Grok 4.1 Fast
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..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does xAI: Grok 4.1 Fast stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
x-ai/grok-4.1-fast
|
| Provider | x-ai |
| Release Date | November 19, 2025 |
| Context Length | 2,000,000 tokens |
| Max Completion | 30,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $0.20 | $0.000200 |
| Output | $0.50 | $0.000500 |
Leaderboard Categories
External Resources
Frequently asked questions about xAI: Grok 4.1 Fast
How much does xAI: Grok 4.1 Fast cost?
xAI: Grok 4.1 Fast costs $0.20 per million input tokens and $0.50 per million output tokens.
What is the context window of xAI: Grok 4.1 Fast?
xAI: Grok 4.1 Fast has a context window of 2,000,000 tokens (2M).
Is xAI: Grok 4.1 Fast good for coding?
On our coding benchmark index, xAI: Grok 4.1 Fast ranks #82 of 307 models, placing it in the broader range of the field for code generation and debugging.
What can xAI: Grok 4.1 Fast do?
xAI: Grok 4.1 Fast supports image/vision input, tool use, and function calling.
Who created xAI: Grok 4.1 Fast?
xAI: Grok 4.1 Fast is developed by xAI and was released on November 19, 2025.
