HEAD TO HEAD
Make the
right call.
Pick two to four models. Compare category evidence, price, context, speed and capabilities side by side.
Sign in to save this comparison →01 / SCORECARD
Coding focus · side by side
| Metric | Claude Fable 5.1 | Gemini 3.1 Pro Preview |
|---|---|---|
| Quantum Score | 60QUANTUM SCORE | Insufficient verified data85% coverage |
| Confidence / coverage | Moderate confidence · 85% · 3 independent domains | Limited evidence · 85% · 2 independent domains |
| Context window | 1,000,000 tokens | — tokens |
| Modalities / tools | text, image · tool use, vision | text, image · vision, tool use |
| Coding | 43 | 37 -6 vs first |
| Reasoning | 92 | 81 -11 vs first |
| Math | 99 | 82 -17 vs first |
| Research | — | — |
| Agents | 40 | 0 -40 vs first |
| Multimodal | 69 | 71 +2 vs first |
| Speed | — | — |
| Value | 23 | 37 +14 vs first |
| Input / 1M | $10.00 | $2.00 |
| Output / 1M | $50.00 | $12.00 |
| Measured output speed | — | — |
02 / EVIDENCE
Published benchmark evidence
| Benchmark | Claude Fable 5.1 | Gemini 3.1 Pro Preview |
|---|---|---|
| LiveBench code_completion · 2026-06-25 · Public table; published model effort variant | 82.609 % benchmark maintainer ↗ | 78.261 % benchmark maintainer ↗ |
| LiveBench code_generation · 2026-06-25 · Public table; published model effort variant | 90.141 % benchmark maintainer ↗ | 74.648 % benchmark maintainer ↗ |
| LiveBench javascript · 2026-06-25 · Public table; published model effort variant | 68.182 % benchmark maintainer ↗ | 59.091 % benchmark maintainer ↗ |
| LiveBench AMPS_Hard · 2026-06-25 · Public table; published model effort variant | 99 % benchmark maintainer ↗ | 98 % benchmark maintainer ↗ |
| LiveBench olympiad · 2026-06-25 · Public table; published model effort variant | 92.968 % benchmark maintainer ↗ | 92.102 % benchmark maintainer ↗ |
| LiveBench theory_of_mind · 2026-06-25 · Public table; published model effort variant | 80.769 % benchmark maintainer ↗ | 80.769 % benchmark maintainer ↗ |
| LiveBench zebra_puzzle · 2026-06-25 · Public table; published model effort variant | 100 % benchmark maintainer ↗ | 85.25 % benchmark maintainer ↗ |
| MMMU-Pro Mercor public leaderboard · MMMU-Pro Mercor public set · Mercor independent evaluation | 83.9 % independent lab ↗ | 84.3 % independent lab ↗ |
AS THE EVIDENCE CHANGED
Comparison history
Dated releases, price events, and benchmark publications. A price or test change can alter the factual comparison; this timeline does not pick a winner.
2026-09-01 · Claude Fable 5.1 released ↗ · source
2026-02-19 · Gemini 3.1 Pro Preview released ↗ · source
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench code_completion (2026-06-25) at 78.261 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench code_generation (2026-06-25) at 74.648 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench javascript (2026-06-25) at 59.091 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench AMPS_Hard (2026-06-25) at 98 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench olympiad (2026-06-25) at 92.102 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench theory_of_mind (2026-06-25) at 80.769 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-1-pro-preview entered LiveBench zebra_puzzle (2026-06-25) at 85.25 % · source ↗
2026-09-30 verified (test date not published) · claude-fable-5-1 entered LiveBench code_completion (2026-06-25) at 82.609 % · source ↗
2026-09-30 verified (test date not published) · claude-fable-5-1 entered LiveBench code_generation (2026-06-25) at 90.141 % · source ↗
2026-09-30 verified (test date not published) · claude-fable-5-1 entered LiveBench javascript (2026-06-25) at 68.182 % · source ↗
2026-09-30 verified (test date not published) · claude-fable-5-1 entered LiveBench AMPS_Hard (2026-06-25) at 99 % · source ↗
2026-09-30 verified (test date not published) · claude-fable-5-1 entered LiveBench olympiad (2026-06-25) at 92.968 % · source ↗
An overall score appears only after enough current, comparable, independently sourced results exist. Pricing and individual benchmark results remain visible meanwhile.