Comparing 2 models
Claude Fable 5.1 vs Gemini 3.5 Flash
Benchmarks through
Verdict
Claude Fable 5.1 places higher on 10 of the 10 tasks where both are ranked. Gemini 3.5 Flash costs 6.7x less per input token. Gemini 3.5 Flash accepts 1.0x more context.
- Choose Claude Fable 5.1 for Translation (#3), Literary Translation (#3), Everyday Translation (#3).
Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.
Measured head to head
Benchmarks both models were run on
| Evaluation | Claude Fable 5.1 | Gemini 3.5 Flash | Source |
|---|---|---|---|
| Design Arena Coding | 1338 Elo | 1268 Elo | source · 2026-10-16 |
| Design Arena Full-stack Agent | 1326 Elo | 1197 Elo | source · 2026-10-14 |
| Design Arena UI | 1338 Elo | 1272 Elo | source · 2026-10-16 |
| Design Arena Web-app Agent | 1311 Elo | 1196 Elo | source · 2026-10-14 |
| Design Arena Website | 1314 Elo | 1269 Elo | source · 2026-10-16 |
| FrontierMath Tiers 1-3 (Epoch AI) | 90.2% ± 1.8 | 62.8% ± 2.9 | source · 2026-09-01 |
| LiveBench Agentic Coding | 66.1% | 49.0% | source · 2026-10-16 |
| LiveBench Coding | 86.4% | 78.2% | source · 2026-10-16 |
| LiveBench Data Analysis | 80.3% | 64.9% | source · 2026-10-16 |
| LiveBench Instruction Following | 73.0% | 75.6% | source · 2026-10-16 |
| LiveBench Language | 89.5% | 84.6% | source · 2026-10-16 |
| LiveBench Math | 97.0% | 88.2% | source · 2026-10-16 |
| LiveBench Reasoning | 91.7% | 82% | source · 2026-10-16 |
| LMArena Creative Writing | 1508 Elo | 1468 Elo | source · 2026-10-15 |
| LMArena Instruction Following | 1517 Elo | 1467 Elo | source · 2026-10-15 |
| LMArena Long Query | 1523 Elo | 1483 Elo | source · 2026-10-15 |
| LMArena Math | 1528 Elo | 1503 Elo | source · 2026-10-15 |
| LMArena Text | 1502 Elo | 1477 Elo | source · 2026-10-15 |
| LMArena Text Factuality | 1498 Elo | 1477 Elo | source · 2026-10-15 |
| LMArena Vision | 1286 Elo | 1284 Elo | source · 2026-10-09 |
| LMArena Vision Diagrams | 1326 Elo | 1309 Elo | source · 2026-10-09 |
| LMArena Vision OCR | 1302 Elo | 1293 Elo | source · 2026-10-09 |
| LMArena WebDev | 1743 Elo | 1499 Elo | source · 2026-10-13 |
| LMArena WebDev Image-to-Web | 1720 Elo | 1501 Elo | source · 2026-10-09 |
| OTIS Mock AIME (Epoch AI) | 100% ± 0 | 95.6% ± 2.7 | source · 2026-09-01 |
| SimpleQA Verified (Epoch AI) | 70.8% ± 1.4 | 66.2% ± 1.5 | source · 2026-09-01 |
Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.
task evidence
How they place when the question changes
Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.