Claude Fable 5.1 is the stronger all-rounder.Kimi K3.1 Pro is cheaper.
Scores updated · 22 tests both models report · How we compare
Where each one wins
Tests won in each of the two areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
Coding rests on a single test.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Kimi K3.1 Pro costs 80% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude Fable 5.1 pulls ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+8points ahead
Where Kimi K3.1 Pro pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 22 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Fable 5.1
- LMArena · WebDevClaude Fable 5.1 by 51 rating points17461695+51 rating
ReasoningClaude Fable 5.1
- Humanity's Last ExamClaude Fable 5.1 by 859.151.1+8
- GPQA Diamondtie93.794.2tie
Other results19 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- Program BenchClaude Fable 5.1 by 56.187.631.5+56.1
- GDP (Surge AI)Claude Fable 5.1 by 50.585.134.6+50.5
- Terminal-Bench-Science 0.1Claude Fable 5.1 by 14.552.638.1+14.5
- BenchCAD w/o toolsKimi K3.1 Pro by 12.260.672.8+12.2
- Terminal-Bench 4.0Kimi K3.1 Pro by 9.955.865.7+9.9
- DeepSWE 1.1Kimi K3.1 Pro by 8.167.475.5+8.1
- PostTrain Bench v1.2Claude Fable 5.1 by 8.144.636.5+8.1
- AA IntelligenceClaude Fable 5.1 by 7.453.446+7.4
- SWE Marathon v1.1Kimi K3.1 Pro by 6.145.651.7+6.1
- HLE (with tools)Kimi K3.1 Pro by 4.465.670+4.4
- ZeroBench_main w/ python (pass@5)Kimi K3.1 Pro by 45963+4
- PostTrainBenchClaude Fable 5.1 by 3.740.236.5+3.7
- ChartoGraphy w/ pythonKimi K3.1 Pro by 1.888.490.2+1.8
- mmmu_pro_with_pythonKimi K3.1 Pro by 1.688.490+1.6
- OfficeQA ProClaude Fable 5.1 by 1.66967.4+1.6
- OSWorld 2.1Claude Fable 5.1 by 1.180.779.6+1.1
- charxiv_rq_with_pythontie92.793.4tie
- baby_vision_with_pythontie95.195.4tie
- BenchCAD w/ toolstie92.692.7tie
Questions people ask
Which is better, Claude Fable 5.1 or Kimi K3.1 Pro?
Claude Fable 5.1 wins all two areas where both have results: coding and reasoning. Kimi K3.1 Pro wins none, but costs 80% less.
Which is better for coding?
Claude Fable 5.1. It wins the one coding test both models report.
Which is cheaper?
Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; Kimi K3.1 Pro costs $2.00 and $10.00. That makes Kimi K3.1 Pro about 80% cheaper for the same work.
How do you compare the two?
We use the 22 benchmark tests both models have published scores on. The verdict counts the 3 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 19 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.