Compare / Claude Opus 4.8 vs Gemini 3.1 Pro Preview
Claude Opus 4.8 vs Gemini 3.1 Pro Preview
24 results from 4 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Claude Opus 4.8 | Gemini 3.1 Pro Preview |
|---|---|---|---|
| Arena (formerly LMArena)reported | Confirmed task successIPS effect estimate | 0.04 | -0.08 |
| Arena (formerly LMArena)reported | Praise over complaintIPS effect estimate | 0.15 | -0.01 |
| Arena (formerly LMArena)reported | SteerabilityIPS effect estimate | 0.10 | -0.04 |
| Arena (formerly LMArena)reported | Tool groundingIPS effect estimate | -0.00 | -0.00 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,486 | 1,459 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,195 | 1,208 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,469 | 1,472 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,490 | 1,477 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,467 | 1,480 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,525 | 1,509 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,491 | 1,479 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,480 | 1,487 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,474 | 1,480 |
| OpenHands Indexreported | Average% resolved | 71.9% | 60.6% |
| OpenHands Indexreported | Front end (SWE-Bench Multimodal)% resolved | 50.0% | 44.1% |
| OpenHands Indexreported | Greenfield (Commit0)% resolved | 62.5% | 25.0% |
| OpenHands Indexreported | Information gathering (GAIA)% resolved | 78.8% | 81.8% |
| OpenHands Indexreported | Issue resolution (SWE-Bench)% resolved | 83.8% | 76.8% |
| OpenHands Indexreported | Testing (SWT-Bench)% resolved | 84.3% | 75.1% |
| tau2-benchreported | Consistency (pass^4)% of tasks | 22.7% | 9.3% |
| tau2-benchreported | Task success (pass^1)% of tasks | 39.7% | 26.0% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 6.0% | 19.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.40 | 0.34 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 65.9 | 72.2 |
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.