Noometry

Model comparison

Claude Opus 5.5 vs MiniMax-M3

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 43.8 on the Noometry Index. MiniMax-M3 costs 15× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Last verified . 30 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

MiniMax-M3 MiniMax

43.8

Rank #85 Confirmed

Summary

  • They share 30 benchmarks with published results for both. Claude Opus 5.5 scores higher in 10 categories and MiniMax-M3 in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 40.0.
  • The biggest single-benchmark swing is ProofBench: 100% for Claude Opus 5.5 and 18% for MiniMax-M3.
  • MiniMax-M3 is cheaper at $0.30 / $1.20 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
  • MiniMax-M3 has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5MiniMax-M3
ProviderAnthropicMiniMax
Noometry Index68.643.8
Released2026-09-222026-06-01
WeightsProprietaryOpen
Context window1M1M
Max output128K512K
Input $ / M tokens$4$0.30
Output $ / M tokens$20$1.20
Results tracked4441

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), MiniMax-M3: 41.8 (#118)

BenchmarkClaude Opus 5.5MiniMax-M3
FrontierCode54.6%14.7%
LMArena WebDev18131482
SciCode66.9%47.1%
LMArena Coding15471469
ALE-Bench2,147640.02
CursorBench57.8%—
FrontierSWE62.3%—
MirrorCode77.4%—

Agentic & Tool Use Claude Opus 5.5 leads

Claude Opus 5.5: 45.3 (#15), MiniMax-M3: 22.6 (#130)

BenchmarkClaude Opus 5.5MiniMax-M3
APEX-Agents73.5%37.7%
Vending-Bench 29,2352,158
OSWorld 2.0—4.6%
GBAEval—0.9%
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), MiniMax-M3: 30.1 (#87)

BenchmarkClaude Opus 5.5MiniMax-M3
NYT Connections (extended)88.5%65.1%
CritPt31.7%3.7%
LMArena Hard Prompts15351447
Mystery Game Puzzles71%8%
DTBench98.9%78.9%
LMCA68.2%33.7%
Epoch Capabilities Index167.33146.95
ARC-AGI-293.3%—
SimpleBench—45.8%
ARC-AGI-198.5%—
Chess Puzzles—14%
EBR-Bench71.4%—
Surface Evolver Bench—55%
ForecastBench—61.4

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), MiniMax-M3: 40.0 (#95)

BenchmarkClaude Opus 5.5MiniMax-M3
OTIS Mock AIME 2024-2025100%71.1%
ProofBench100%18%
LMArena Math15061429
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), MiniMax-M3: 58.4 (#35)

BenchmarkClaude Opus 5.5MiniMax-M3
GPQA Diamond90.6%90.9%
LMArena Expert15471461
SimpleQA Verified72.2%—

Multimodal Claude Opus 5.5 leads

Claude Opus 5.5: 57.8 (#1), MiniMax-M3: 40.2 (#51)

BenchmarkClaude Opus 5.5MiniMax-M3
LMArena Vision13211253
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—
LMArena Document—1435

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), MiniMax-M3: 53.0 (#75)

BenchmarkClaude Opus 5.5MiniMax-M3
LMArena Non-English15071420
LMArena Chinese15881463
LMArena French15141447
LMArena Russian15201428
LMArena Spanish15071432
LMArena German—1426
LMArena Japanese—1381
LMArena Korean—1372

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), MiniMax-M3: 75.5 (#62)

BenchmarkClaude Opus 5.5MiniMax-M3
LMArena Instruction Following15371433

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), MiniMax-M3: 44.2 (#72)

BenchmarkClaude Opus 5.5MiniMax-M3
LMArena Longer Query15321445

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), MiniMax-M3: 62.1 (#83)

BenchmarkClaude Opus 5.5MiniMax-M3
LMArena Text15151433
LMArena Creative Writing15331404
LMArena Multi-Turn14991442
EQ-Bench Creative Writing2050—
EQ-Bench 4—1150

Frequently asked questions

Is Claude Opus 5.5 better than MiniMax-M3?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 43.8 on the Noometry Index. MiniMax-M3 costs 15× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5.5 or MiniMax-M3?

MiniMax-M3 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Claude Opus 5.5 lists at $4 and $20.

Is Claude Opus 5.5 or MiniMax-M3 better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 41.8 in the Noometry coding category.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do Claude Opus 5.5 and MiniMax-M3 share?

30 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and MiniMax-M3 has 41.

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