xAI
Grok 4.1 Fast (Reasoning)
Grok 4.1 Fast (Reasoning) is an xAI Grok model profile, part of xAI's assistant and reasoning model family for real-time, coding, and general-purpose AI workflows. The benchmark snapshot highlights how this Grok variant compares with competing frontier and open-weight models on capability, speed, latency, and cost.
xAI model releasesOperational Metrics
Output Speed140.9 tok/s
First Token7.24s
Blended Price$0.275/M
Model Metadata
Queryable facts extracted from the upstream model payload.
ReleaseNov 19, 2025
Context Windown/a
Modalitiesn/a
Strength: LCB
Rank #22 across 343 models.
82.2%
Strength: MMLU-Pro
Rank #28 across 345 models.
85.4%
Strength: Value
Rank #29 across 323 models.
140.4
Watch Area: TTFT
Rank #248 across 293 models.
7.24s
Strength Profile
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Benchmark Percentiles
Higher bars mean stronger relative placement.
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 38.6 | #84 |
| Artificial Analysis Coding Index | coding | 30.9 | #108 |
| Artificial Analysis Math Index | math | 89.3 | #31 |
| MMLU-Pro | reasoning | 85.4% | #28 |