Xai
Grok 4.1 Fast Non-Reasoning
Grok 4.1 Fast is xAI's best tool-calling model with a 2M context window. It reasons and completes agentic tasks accurately and rapidly, excelling at complex real-world use cases such as customer support and finance. To optimize for speed use this variant. Otherwise, use the reasoning version.
xAI model releasesModel Snapshot
TypeLanguage
ReleaseNov 19, 2025
Context1,000,000
Tagstool-use, file-input, vision, implicit-caching
Overall
No rank
n/a
Coding
No rank
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Blended Price
No rank
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Strength Profile
Percentile score by analysis domain.
Not enough comparable domain data for this model.
Benchmark Percentiles
Higher bars mean stronger relative placement.
Model Details
Runtime
Max Output1,000,000
Streaming speed is not measured for this model yet.
Pricing
Blended-
Input-
Output-
Catalog$0.200/M in / $0.500/M out
Metadata
Providers
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| MMLU-Pro | reasoning | 75.2% | #185 |