Compare / GPT-5 Mini vs grok-4-fast-reasoning
GPT-5 Mini vs grok-4-fast-reasoning
16 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | GPT-5 Mini | grok-4-fast-reasoning |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,394 | 1,417 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,381 | 1,403 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,324 | 1,383 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,400 | 1,421 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,373 | 1,389 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,390 | 1,405 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,352 | 1,388 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 20.6 | 17.9 |
| Artificial Analysisreported | GPQA Diamond% of questions | 82.8% | 84.7% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 21.5% | 19.1% |
| Artificial Analysisreported | IFBench% of instructions | 75.4% | 50.5% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 72.3% | 73.7% |
| Artificial Analysisreported | Terminal-Bench Hard% of tasks | 33.3% | 18.9% |
| Artificial Analysisreported | Τ²-bench telecom% of tasks | 71.1% | 65.8% |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 99.9% | 99.5% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 12.9% | 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.