Compare / grok-4-1-fast-non-reasoning vs grok-4-fast-reasoning
grok-4-1-fast-non-reasoning vs grok-4-fast-reasoning
12 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | grok-4-1-fast-non-reasoning | grok-4-fast-reasoning |
|---|---|---|---|
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 11.3 | 17.9 |
| Artificial Analysisreported | GPQA Diamond% of questions | 63.7% | 84.7% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 5.1% | 19.1% |
| Artificial Analysisreported | IFBench% of instructions | 36.5% | 50.5% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 31.3% | 73.7% |
| Artificial Analysisreported | Terminal-Bench Hard% of tasks | 14.4% | 18.9% |
| Artificial Analysisreported | Τ²-bench telecom% of tasks | 63.7% | 65.8% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 10.0% | 23.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.32 | 0.33 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 41.9 | 53.4 |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 98.5% | 99.5% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 17.8% | 20.2% |
Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.