Noometry

Model comparison

Claude Fable 5.1 vs Ministral 3B

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 26.2 on the Noometry Index. Ministral 3B costs 200× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Last verified . 3 shared benchmarks.

Claude Fable 5.1 Anthropic

69.0

Rank #2 Confirmed

Ministral 3B Mistral AI

26.2

Rank #338 Confirmed

Summary

  • They share 3 benchmarks with published results for both. Claude Fable 5.1 scores higher in 3 categories and Ministral 3B in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 26.6.
  • The biggest single-benchmark swing is LMCA: 65.5% for Claude Fable 5.1 and 5.5% for Ministral 3B.
  • Ministral 3B is cheaper at $0.10 / $0.10 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
  • Claude Fable 5.1 accepts more context: 1M tokens versus 131K.
  • Ministral 3B has downloadable open weights; the other is API-only.

Side by side

Claude Fable 5.1Ministral 3B
ProviderAnthropicMistral AI
Noometry Index69.026.2
Released2026-09-012024-10-01
WeightsProprietaryOpen
Context window1M131K
Max output128K262K
Input $ / M tokens$10$0.10
Output $ / M tokens$50$0.10
Results tracked526

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Not comparable

Claude Fable 5.1: 74.7 (#1), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
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), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
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), Ministral 3B: 18.4 (#282)

BenchmarkClaude Fable 5.1Ministral 3B
DTBench97.6%51.7%
LMCA65.5%5.5%
Epoch Capabilities Index164.7118.1
ARC-AGI-290%—
NYT Connections (extended)90%—
ARC-AGI-197.5%—
CritPt31.1%—
Chess Puzzles47%—
EBR-Bench57.1%—
LMArena Hard Prompts1526—
Mystery Game Puzzles58%—

Math Claude Fable 5.1 leads

Claude Fable 5.1: 89.6 (#4), Ministral 3B: 26.6 (#258)

BenchmarkClaude Fable 5.1Ministral 3B
FrontierMath (Tiers 1-3)90.2%—
FrontierMath Tier 487.8%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math1525—
MATH Level 5—14.4%
FrontierMath Erdős0%—

Knowledge Claude Fable 5.1 leads

Claude Fable 5.1: 69.6 (#6), Ministral 3B: 10.4 (#302)

BenchmarkClaude Fable 5.1Ministral 3B
GPQA Diamond—25.3%
Humanity's Last Exam46.5%—
SimpleQA Verified70.8%—
Vectara Hallucination Rate—7.3%
LMArena Expert1535—

Multimodal Not comparable

Claude Fable 5.1: 53.9 (#4), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
LMArena Vision1318—
Blueprint-Bench 241.9%—
Furniture Assembly70%—
LMArena Document1513—

Multilingual Not comparable

Claude Fable 5.1: 59.1 (#3), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
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), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
LMArena Instruction Following1517—

Long Context Not comparable

Claude Fable 5.1: 46.7 (#20), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
LMArena Longer Query1522—

Writing & Preference Not comparable

Claude Fable 5.1: 79.2 (#2), Ministral 3B: —

BenchmarkClaude Fable 5.1Ministral 3B
LMArena Text1510—
LMArena Creative Writing1507—
EQ-Bench Creative Writing2162—
LMArena Multi-Turn1492—

Frequently asked questions

Is Claude Fable 5.1 better than Ministral 3B?

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 26.2 on the Noometry Index. Ministral 3B costs 200× 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 Ministral 3B?

Ministral 3B is cheaper. It lists at $0.10 per million input tokens and $0.10 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 131K.

How many benchmarks do Claude Fable 5.1 and Ministral 3B share?

3 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Ministral 3B has 6.

Related comparisons

Go deeper