Noometry

Model comparison

Claude Opus 5 vs Ministral 3B

Claude Opus 5 is the stronger model overall, scoring 67.7 to 25.6 on the Noometry Index. Ministral 3B costs 250× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

Last verified . 4 shared benchmarks.

Claude Opus 5 Anthropic

67.7

Rank #4 Confirmed

Ministral 3B Mistral AI

25.6

Rank #336 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Claude Opus 5 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 Opus 5 leads 86.1 to 24.5.
  • The biggest single-benchmark swing is GPQA Diamond: 93.9% for Claude Opus 5 and 25.3% for Ministral 3B.
  • Ministral 3B is cheaper at $0.04 / $0.04 per million input/output tokens, against $5 / $25 for Claude Opus 5.
  • Claude Opus 5 accepts more context: 1M tokens versus 128K.
  • Ministral 3B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5Ministral 3B
ProviderAnthropicMistral AI
Noometry Index67.725.6
Released2026-07-242024-10-01
WeightsProprietaryOpen
Context window1M128K
Max output128K128K
Input $ / M tokens$5$0.04
Output $ / M tokens$25$0.04
Results tracked576

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Category by category

Coding Not comparable

Claude Opus 5: 67.0 (#5), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
DeepSWE73.6%—
FrontierCode53.4%—
CursorBench46.6%—
LMArena WebDev1694—
FrontierSWE52%—
SciCode56.4%—
WeirdML91.8%—
LMArena Coding1533—
ALE-Bench2,165—

Agentic & Tool Use Not comparable

Claude Opus 5: 55.5 (#1), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
APEX-Agents65.8%—
OSWorld 2.031.4%—
τ²-bench Banking48.7%—
PostTrainBench35%—
BALROG63.4%—
GBAEval79.6%—
GDP.pdf24%—
Vending-Bench 211,182—

Reasoning Claude Opus 5 leads

Claude Opus 5: 77.1 (#3), Ministral 3B: 17.7 (#278)

BenchmarkClaude Opus 5Ministral 3B
DTBench97.9%51.7%
LMCA64.5%5.5%
Epoch Capabilities Index162.67118.08
ARC-AGI-290.4%—
SimpleBench80.6%—
NYT Connections (extended)94.3%—
ARC-AGI-197.5%—
CritPt29.1%—
Chess Puzzles42%—
EBR-Bench45.7%—
LMArena Hard Prompts1525—
Mystery Game Puzzles59%—
Bench to the Future 30.12—

Math Claude Opus 5 leads

Claude Opus 5: 86.1 (#6), Ministral 3B: 24.5 (#257)

BenchmarkClaude Opus 5Ministral 3B
FrontierMath (Tiers 1-3)85.6%—
FrontierMath Tier 473.2%—
OTIS Mock AIME 2024-202598.9%—
ProofBench99%—
LMArena Math1533—
MATH Level 5—14.4%

Knowledge Claude Opus 5 leads

Claude Opus 5: 66.8 (#8), Ministral 3B: 10.4 (#297)

BenchmarkClaude Opus 5Ministral 3B
GPQA Diamond93.9%25.3%
SimpleQA Verified59.9%—
Vectara Hallucination Rate—7.3%
LMArena Expert1558—

Multimodal Not comparable

Claude Opus 5: 51.1 (#6), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
LMArena Vision1321—
Blueprint-Bench 230.4%—
Furniture Assembly60.8%—
LMArena Document1516—

Multilingual Not comparable

Claude Opus 5: 58.8 (#3), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
LMArena Non-English1500—
LMArena Chinese1575—
LMArena French1522—
LMArena German1522—
LMArena Japanese1510—
LMArena Korean1526—
LMArena Russian1507—
LMArena Spanish1519—

Instruction Following Not comparable

Claude Opus 5: 79.3 (#5), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
LMArena Instruction Following1516—

Long Context Not comparable

Claude Opus 5: 46.5 (#20), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
LMArena Longer Query1516—

Writing & Preference Not comparable

Claude Opus 5: 79.3 (#2), Ministral 3B: —

BenchmarkClaude Opus 5Ministral 3B
LMArena Text1506—
LMArena Creative Writing1491—
EQ-Bench Creative Writing2133—
EQ-Bench 41385—
LMArena Multi-Turn1496—

Frequently asked questions

Is Claude Opus 5 better than Ministral 3B?

Claude Opus 5 is the stronger model overall, scoring 67.7 to 25.6 on the Noometry Index. Ministral 3B costs 250× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5 or Ministral 3B?

Ministral 3B is cheaper. It lists at $0.04 per million input tokens and $0.04 per million output tokens; Claude Opus 5 lists at $5 and $25.

Which has the bigger context window?

Claude Opus 5 does, with 1M tokens against 128K.

How many benchmarks do Claude Opus 5 and Ministral 3B share?

4 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Ministral 3B has 6.

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