Compare / Gemini 3.8 Flash vs grok-4-fast-reasoning
Gemini 3.8 Flash vs grok-4-fast-reasoning
14 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Gemini 3.8 Flash | grok-4-fast-reasoning |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,477 | 1,417 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,482 | 1,403 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,482 | 1,383 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,529 | 1,421 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,488 | 1,389 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,492 | 1,405 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,486 | 1,388 |
| Artificial Analysisreported | Artificial Analysis Intelligence Indexindex score | 40.9 | 17.9 |
| Artificial Analysisreported | GPQA Diamond% of questions | 95.3% | 84.7% |
| Artificial Analysisreported | Humanity's Last Exam% of questions | 47.8% | 19.1% |
| Artificial Analysisreported | Long-context reasoning (AA-LCR)% of questions | 84.0% | 73.7% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 13.0% | 23.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.34 | 0.33 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 78.5 | 53.4 |
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.