Noometry

Model comparison

Claude Fable 5.1 vs Mistral Small 3.2

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 31.2 on the Noometry Index. Mistral Small 3.2 costs 151× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Last verified . 4 shared benchmarks.

Claude Fable 5.1 Anthropic

69.0

Rank #2 Confirmed

Mistral Small 3.2 Mistral AI

31.2

Rank #280 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Claude Fable 5.1 scores higher in 4 categories and Mistral Small 3.2 in 0 categories; 4 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 26.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Fable 5.1 and 30.3% for Mistral Small 3.2.
  • Mistral Small 3.2 is cheaper at $0.0938 / $0.25 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
  • Claude Fable 5.1 accepts more context: 1M tokens versus 256K.
  • Mistral Small 3.2 has downloadable open weights; the other is API-only.

Side by side

Claude Fable 5.1Mistral Small 3.2
ProviderAnthropicMistral AI
Noometry Index69.031.2
Released2026-09-012025-06-20
WeightsProprietaryOpen
Context window1M256K
Max output128K16K
Input $ / M tokens$10$0.0938
Output $ / M tokens$50$0.25
Results tracked526

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Category by category

Coding Not comparable

Claude Fable 5.1: 74.7 (#1), Mistral Small 3.2: —

BenchmarkClaude Fable 5.1Mistral Small 3.2
FrontierCode50.9%—
CursorBench51.8%—
LMArena WebDev1744—
FrontierSWE56.3%—
SciCode63.1%—
GSO88.2%—
WeirdML92.9%—
LMArena Coding1528—
MirrorCode73.3%—
ALE-Bench2,143—

Agentic & Tool Use Not comparable

Claude Fable 5.1: 50.7 (#5), Mistral Small 3.2: —

BenchmarkClaude Fable 5.1Mistral Small 3.2
APEX-Agents68.6%—
Remote Labor Index17.9%—
GDP.pdf29.6%—
Vending-Bench 25,422—

Reasoning Claude Fable 5.1 leads

Claude Fable 5.1: 76.7 (#7), Mistral Small 3.2: 18.1 (#287)

BenchmarkClaude Fable 5.1Mistral Small 3.2
Chess Puzzles47%1%
Epoch Capabilities Index164.7131.74
ARC-AGI-290%—
Kagi LLM Benchmark—40.4%
NYT Connections (extended)90%—
ARC-AGI-197.5%—
CritPt31.1%—
EBR-Bench57.1%—
LMArena Hard Prompts1526—
Mystery Game Puzzles58%—
DTBench97.6%—
LMCA65.5%—

Math Claude Fable 5.1 leads

Claude Fable 5.1: 89.6 (#4), Mistral Small 3.2: 26.3 (#260)

BenchmarkClaude Fable 5.1Mistral Small 3.2
OTIS Mock AIME 2024-2025100%30.3%
FrontierMath (Tiers 1-3)90.2%—
FrontierMath Tier 487.8%—
ProofBench100%—
LMArena Math1525—
FrontierMath Erdős0%—

Knowledge Claude Fable 5.1 leads

Claude Fable 5.1: 69.6 (#6), Mistral Small 3.2: 26.7 (#256)

BenchmarkClaude Fable 5.1Mistral Small 3.2
GPQA Diamond—49.1%
Humanity's Last Exam46.5%—
SimpleQA Verified70.8%—
LMArena Expert1535—

Multimodal Not comparable

Claude Fable 5.1: 53.9 (#4), Mistral Small 3.2: —

BenchmarkClaude Fable 5.1Mistral Small 3.2
LMArena Vision1318—
Blueprint-Bench 241.9%—
Furniture Assembly70%—
LMArena Document1513—

Multilingual Not comparable

Claude Fable 5.1: 59.1 (#3), Mistral Small 3.2: —

BenchmarkClaude Fable 5.1Mistral Small 3.2
LMArena Non-English1507—
LMArena Chinese1586—
LMArena French1525—
LMArena German1500—
LMArena Japanese1543—
LMArena Korean1534—
LMArena Russian1521—
LMArena Spanish1516—

Instruction Following Not comparable

Claude Fable 5.1: 79.2 (#6), Mistral Small 3.2: —

BenchmarkClaude Fable 5.1Mistral Small 3.2
LMArena Instruction Following1517—

Long Context Not comparable

Claude Fable 5.1: 46.7 (#20), Mistral Small 3.2: —

BenchmarkClaude Fable 5.1Mistral Small 3.2
LMArena Longer Query1522—

Writing & Preference Claude Fable 5.1 leads

Claude Fable 5.1: 79.2 (#2), Mistral Small 3.2: 45.0 (#224)

BenchmarkClaude Fable 5.1Mistral Small 3.2
EQ-Bench Creative Writing21621255
LMArena Text1510—
LMArena Creative Writing1507—
LMArena Multi-Turn1492—

Frequently asked questions

Is Claude Fable 5.1 better than Mistral Small 3.2?

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 31.2 on the Noometry Index. Mistral Small 3.2 costs 151× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Which is cheaper, Claude Fable 5.1 or Mistral Small 3.2?

Mistral Small 3.2 is cheaper. It lists at $0.0938 per million input tokens and $0.25 per million output tokens; Claude Fable 5.1 lists at $10 and $50.

Which has the bigger context window?

Claude Fable 5.1 does, with 1M tokens against 256K.

How many benchmarks do Claude Fable 5.1 and Mistral Small 3.2 share?

4 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Mistral Small 3.2 has 6.

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