Compare / Claude Fable 5 vs GPT-5.6 Sol
Claude Fable 5 vs GPT-5.6 Sol
18 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Claude Fable 5 | GPT-5.6 Sol |
|---|---|---|---|
| Arena (formerly LMArena)reported | Confirmed task successIPS effect estimate | 0.03 | 0.03 |
| Arena (formerly LMArena)reported | Praise over complaintIPS effect estimate | 0.17 | 0.19 |
| Arena (formerly LMArena)reported | SteerabilityIPS effect estimate | 0.11 | 0.07 |
| Arena (formerly LMArena)reported | Tool groundingIPS effect estimate | 0.00 | 0.00 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,499 | 1,489 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,229 | 1,256 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,483 | 1,476 |
| Arena (formerly LMArena)reported | Business, management and financeArena rating | 1,503 | 1,485 |
| Arena (formerly LMArena)reported | Creative writingArena rating | 1,501 | 1,470 |
| Arena (formerly LMArena)reported | Expert promptsArena rating | 1,550 | 1,534 |
| Arena (formerly LMArena)reported | Instruction followingArena rating | 1,509 | 1,489 |
| Arena (formerly LMArena)reported | OverallArena rating | 1,504 | 1,483 |
| Arena (formerly LMArena)reported | Writing, literature and languageArena rating | 1,508 | 1,483 |
| tau2-benchreported | Consistency (pass^4)% of tasks | 28.9% | 27.8% |
| tau2-benchreported | Task success (pass^1)% of tasks | 39.7% | 46.9% |
| UGI Leaderboardreported | Requested-length error% off the requested word count | 2.0% | 1.0% |
| UGI Leaderboardreported | Style adherencescore from 0 to 1 | 0.41 | 0.37 |
| UGI Leaderboardreported | Writing scorescore out of 100 | 74.2 | 65.4 |
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.