Noometry

Model comparison

Claude Opus 4.5 vs Mistral Medium

Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 36.3 on the Noometry Index. Mistral Medium costs 3.3× less per token, which makes it the better buy when Claude Opus 4.5's lead doesn't matter for your workload.

Last verified . 29 shared benchmarks.

Claude Opus 4.5 Anthropic

50.5

Rank #47 Confirmed

Mistral Medium Mistral AI

36.3

Rank #218 Confirmed

Summary

  • They share 29 benchmarks with published results for both. Claude Opus 4.5 scores higher in 9 categories and Mistral Medium in 1 category; 10 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Claude Opus 4.5 leads 56.5 to 25.0.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 86.1% for Claude Opus 4.5 and 32.2% for Mistral Medium.
  • Mistral Medium is cheaper at $1.50 / $7.50 per million input/output tokens, against $5 / $25 for Claude Opus 4.5.
  • Mistral Medium accepts more context: 262K tokens versus 200K.
  • Mistral Medium has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.5Mistral Medium
ProviderAnthropicMistral AI
Noometry Index50.536.3
Released2025-11-012023-12-11
WeightsProprietaryOpen
Context window200K262K
Max output64K262K
Input $ / M tokens$5$1.50
Output $ / M tokens$25$7.50
Results tracked6936

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Category by category

Coding Claude Opus 4.5 leads

Claude Opus 4.5: 54.8 (#27), Mistral Medium: 34.2 (#243)

BenchmarkClaude Opus 4.5Mistral Medium
WeirdML63.7%43.7%
LMArena Coding15041434
ALE-Bench1,025763.98
SWE-bench Verified76.7%—
FrontierCode—8%
SWE-bench Verified (bash only)76.8%—
LMArena WebDev1494—
SWE-bench Multilingual70.7%—
SciCode—40.2%
GSO26.5%—
AlgoTune1.77—

Agentic & Tool Use Claude Opus 4.5 leads

Claude Opus 4.5: 47.3 (#12), Mistral Medium: 28.3 (#90)

BenchmarkClaude Opus 4.5Mistral Medium
Berkeley Function Calling Leaderboard77.5%37.7%
Terminal-Bench63.1%—
GDPval45.5%—
Remote Labor Index3.8%—
τ²-bench Airline84%—
τ²-bench Banking24.7%—
τ²-bench Retail79.6%—
τ²-bench Telecom92.3%—
Cybench82%—
DeepResearch Bench54.8%—
OSWorld66.3%—
BALROG43.5%—
LMArena Search1180—
METR Time Horizons75%—
Vending-Bench 24,967—

Reasoning Claude Opus 4.5 leads

Claude Opus 4.5: 42.6 (#51), Mistral Medium: 24.0 (#167)

BenchmarkClaude Opus 4.5Mistral Medium
Kagi LLM Benchmark80.2%50%
LMArena Hard Prompts14761426
DTBench89.9%75.5%
LMCA44.5%26.1%
ARC-AGI-237.6%—
SimpleBench62%—
NYT Connections (extended)52.5%—
ARC-AGI-180%—
CritPt—0%
Chess Puzzles12%—
EnigmaEval11.9%—
EBR-Bench14.3%—
Mystery Game Puzzles22%—
Surface Evolver Bench—26.9%
Epoch Capabilities Index150.09—
ForecastBench60.7—

Math Claude Opus 4.5 leads

Claude Opus 4.5: 38.6 (#132), Mistral Medium: 28.1 (#245)

BenchmarkClaude Opus 4.5Mistral Medium
OTIS Mock AIME 2024-202586.1%32.2%
ProofBench36%9%
LMArena Math14631408
FrontierMath (Feb 2025 set)20.7%0.3%
FrontierMath (Tiers 1-3)34.4%—
FrontierMath Tier 44.9%—
MATH Level 5—81.6%
FrontierMath Tier 4 (v1)4.2%—

Knowledge Claude Opus 4.5 leads

Claude Opus 4.5: 56.5 (#44), Mistral Medium: 25.0 (#265)

BenchmarkClaude Opus 4.5Mistral Medium
GPQA Diamond86%59.5%
Humanity's Last Exam25.2%4.5%
Vectara Hallucination Rate10.9%22.7%
LMArena Expert14871408
SimpleQA Verified45.7%—

Multimodal Mistral Medium leads

Claude Opus 4.5: 31.4 (#107), Mistral Medium: 35.3 (#88)

BenchmarkClaude Opus 4.5Mistral Medium
LMArena Vision—1172
GeoBench75%—
VPCT40%—
Furniture Assembly28.3%—
LMArena Document1462—

Multilingual Claude Opus 4.5 leads

Claude Opus 4.5: 54.3 (#47), Mistral Medium: 52.1 (#91)

BenchmarkClaude Opus 4.5Mistral Medium
LMArena Non-English14381408
LMArena Chinese14701447
LMArena French14711459
LMArena German14491432
LMArena Japanese14161378
LMArena Korean14241380
LMArena Russian14471411
LMArena Spanish14581433

Instruction Following Claude Opus 4.5 leads

Claude Opus 4.5: 77.5 (#19), Mistral Medium: 73.7 (#116)

BenchmarkClaude Opus 4.5Mistral Medium
LMArena Instruction Following14781398

Long Context Claude Opus 4.5 leads

Claude Opus 4.5: 46.5 (#22), Mistral Medium: 42.9 (#114)

BenchmarkClaude Opus 4.5Mistral Medium
LMArena Longer Query14801406
CL-bench21.1%—

Writing & Preference Claude Opus 4.5 leads

Claude Opus 4.5: 68.1 (#28), Mistral Medium: 60.0 (#103)

BenchmarkClaude Opus 4.5Mistral Medium
LMArena Text14511424
LMArena Creative Writing14451391
LMArena Multi-Turn14661418
Short-Story Creative Writing—77.3%
EQ-Bench Creative Writing1687—

Frequently asked questions

Is Claude Opus 4.5 better than Mistral Medium?

Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 36.3 on the Noometry Index. Mistral Medium costs 3.3× less per token, which makes it the better buy when Claude Opus 4.5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.5 or Mistral Medium?

Mistral Medium is cheaper. It lists at $1.50 per million input tokens and $7.50 per million output tokens; Claude Opus 4.5 lists at $5 and $25.

Is Claude Opus 4.5 or Mistral Medium better for coding?

Claude Opus 4.5 scores higher on coding benchmarks: 54.8 versus 34.2 in the Noometry coding category.

Which has the bigger context window?

Mistral Medium does, with 262K tokens against 200K.

How many benchmarks do Claude Opus 4.5 and Mistral Medium share?

29 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Mistral Medium has 36.

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