Noometry

Model comparison

Claude Opus 4.8 vs Ministral 8B

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 27.8 on the Noometry Index. Ministral 8B costs 100× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

Last verified . 14 shared benchmarks.

Claude Opus 4.8 Anthropic

60.7

Rank #9 Confirmed

Ministral 8B Mistral AI

27.8

Rank #321 Confirmed

Summary

  • They share 14 benchmarks with published results for both. Claude Opus 4.8 scores higher in 9 categories and Ministral 8B in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 4.8 leads 78.2 to 23.7.
  • The biggest single-benchmark swing is GPQA Diamond: 91% for Claude Opus 4.8 and 27.1% for Ministral 8B.
  • Ministral 8B is cheaper at $0.10 / $0.10 per million input/output tokens, against $5 / $25 for Claude Opus 4.8.
  • Claude Opus 4.8 accepts more context: 1M tokens versus 128K.
  • Ministral 8B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.8Ministral 8B
ProviderAnthropicMistral AI
Noometry Index60.727.8
Released2026-05-282024-10-01
WeightsProprietaryOpen
Context window1M128K
Max output128K128K
Input $ / M tokens$5$0.10
Output $ / M tokens$25$0.10
Results tracked6517

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Category by category

Coding Claude Opus 4.8 leads

Claude Opus 4.8: 60.2 (#9), Ministral 8B: 34.4 (#226)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Coding14911202
DeepSWE59%—
FrontierCode46.5%—
LMArena WebDev1556—
SciCode53.5%—
GSO47.1%—
WeirdML82.9%—
ALE-Bench1,564—

Agentic & Tool Use Claude Opus 4.8 leads

Claude Opus 4.8: 47.6 (#10), Ministral 8B: 16.2 (#140)

BenchmarkClaude Opus 4.8Ministral 8B
APEX-Agents48.9%—
Berkeley Function Calling Leaderboard—11.1%
OSWorld 2.020.6%—
Remote Labor Index8.3%—
τ²-bench Banking39.7%—
DeepResearch Bench50.2%—
PostTrainBench33.8%—
GBAEval70.9%—
GDP.pdf24%—
LMArena Search1204—
Vending-Bench 25,787—

Reasoning Claude Opus 4.8 leads

Claude Opus 4.8: 64.6 (#14), Ministral 8B: 17.7 (#279)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Hard Prompts14811191
DTBench94.9%45.7%
ARC-AGI-272.1%—
SimpleBench64.8%—
Kagi LLM Benchmark88.8%—
NYT Connections (extended)91.1%—
ARC-AGI-192.5%—
CritPt20.9%—
Chess Puzzles34%—
EnigmaEval23.5%—
EBR-Bench28.6%—
Mystery Game Puzzles36%—
LMCA57.5%—
Surface Evolver Bench87.5%—
Bench to the Future 30.14—
Epoch Capabilities Index158.3—
ForecastBench59.9—

Math Claude Opus 4.8 leads

Claude Opus 4.8: 78.2 (#11), Ministral 8B: 23.7 (#262)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Math14871188
FrontierMath (Tiers 1-3)80%—
FrontierMath Tier 456.1%—
MathArena Final-Answer Competitions91.8%—
OTIS Mock AIME 2024-202598.3%—
ProofBench69%—
MATH Level 5—14.9%
FrontierMath (Feb 2025 set)47.2%—
FrontierMath Tier 4 (v1)31.3%—

Knowledge Claude Opus 4.8 leads

Claude Opus 4.8: 61.3 (#26), Ministral 8B: 12.5 (#292)

BenchmarkClaude Opus 4.8Ministral 8B
GPQA Diamond91%27.1%
LMArena Expert15011170
SimpleQA Verified53%—
Vectara Hallucination Rate—7.4%

Multimodal Not comparable

Claude Opus 4.8: 43.2 (#20), Ministral 8B: —

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Vision1295—
Blueprint-Bench 214.5%—
Furniture Assembly42.5%—
LMArena Document1475—

Multilingual Claude Opus 4.8 leads

Claude Opus 4.8: 55.4 (#31), Ministral 8B: 35.3 (#242)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Non-English14501165
LMArena Chinese15091193
LMArena Russian14761195
LMArena French1482—
LMArena German1470—
LMArena Japanese1440—
LMArena Korean1432—
LMArena Spanish1470—

Instruction Following Claude Opus 4.8 leads

Claude Opus 4.8: 77.6 (#22), Ministral 8B: 60.7 (#245)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Instruction Following14761161

Long Context Claude Opus 4.8 leads

Claude Opus 4.8: 45.4 (#37), Ministral 8B: 36.7 (#222)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Longer Query14821212

Writing & Preference Claude Opus 4.8 leads

Claude Opus 4.8: 72.1 (#17), Ministral 8B: 39.8 (#241)

BenchmarkClaude Opus 4.8Ministral 8B
LMArena Text14601191
LMArena Creative Writing14531175
LMArena Multi-Turn14761166
EQ-Bench Creative Writing1840—
EQ-Bench 41281—

Frequently asked questions

Is Claude Opus 4.8 better than Ministral 8B?

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 27.8 on the Noometry Index. Ministral 8B costs 100× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.8 or Ministral 8B?

Ministral 8B is cheaper. It lists at $0.10 per million input tokens and $0.10 per million output tokens; Claude Opus 4.8 lists at $5 and $25.

Is Claude Opus 4.8 or Ministral 8B better for coding?

Claude Opus 4.8 scores higher on coding benchmarks: 60.2 versus 34.4 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 4.8 does, with 1M tokens against 128K.

How many benchmarks do Claude Opus 4.8 and Ministral 8B share?

14 benchmarks have published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and Ministral 8B has 17.

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