Compare / GPT-4.1 vs grok-4-1-fast-reasoning
GPT-4.1 vs grok-4-1-fast-reasoning
20 results from 4 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | GPT-4.1 | grok-4-1-fast-reasoning |
|---|---|---|---|
| Arena (formerly LMArena)reported | OverallArena rating | 1,408 | 1,413 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,415 | 1,417 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,402 | 1,414 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,405 | 1,438 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,403 | 1,401 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,415 | 1,430 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,405 | 1,407 |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Irrelevance detection% correct | 86.5% | 79.4% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Memory% correct | 23.9% | 54.0% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Multi-turn tasks% correct | 38.9% | 58.9% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Overall accuracy% correct | 54.0% | 69.6% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Relevance detection% correct | 100.0% | 81.2% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Single-turn calls (curated)% correct | 88.7% | 88.3% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Single-turn calls (user-contributed)% correct | 78.9% | 78.5% |
| Berkeley Function Calling Leaderboard (BFCL) V4reported | Web search% correct | 68.0% | 82.5% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 6.0% | 7.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.33 | 0.33 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 67.5 | 51.3 |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 99.9% | 99.7% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 5.6% | 19.2% |
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.