Noometry

Model comparison

Claude Opus 5.5 vs MiniMax-M2.5

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 38.3 on the Noometry Index. MiniMax-M2.5 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 . 23 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

MiniMax-M2.5 MiniMax

38.3

Rank #188 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Claude Opus 5.5 scores higher in 9 categories and MiniMax-M2.5 in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 26.9.
  • The biggest single-benchmark swing is ProofBench: 100% for Claude Opus 5.5 and 4% for MiniMax-M2.5.
  • MiniMax-M2.5 is cheaper at $0.30 / $1.20 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
  • Claude Opus 5.5 accepts more context: 1M tokens versus 205K.
  • MiniMax-M2.5 has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5MiniMax-M2.5
ProviderAnthropicMiniMax
Noometry Index68.638.3
Released2026-09-222026-02-12
WeightsProprietaryOpen
Context window1M205K
Max output128K131K
Input $ / M tokens$4$0.30
Output $ / M tokens$20$1.20
Results tracked4433

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), MiniMax-M2.5: 48.1 (#58)

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena WebDev18131387
LMArena Coding15471381
ALE-Bench2,147618.17
FrontierCode54.6%—
SWE-bench Verified (bash only)—75.8%
CursorBench57.8%—
SWE-bench Multilingual—68.3%
FrontierSWE62.3%—
SciCode66.9%—
MirrorCode77.4%—

Agentic & Tool Use Claude Opus 5.5 leads

Claude Opus 5.5: 45.3 (#15), MiniMax-M2.5: 30.4 (#77)

BenchmarkClaude Opus 5.5MiniMax-M2.5
Vending-Bench 29,235-23.16
Terminal-Bench—42.7%
APEX-Agents73.5%—
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), MiniMax-M2.5: 17.5 (#292)

BenchmarkClaude Opus 5.5MiniMax-M2.5
ARC-AGI-293.3%4.9%
NYT Connections (extended)88.5%16.8%
ARC-AGI-198.5%63.7%
LMArena Hard Prompts15351372
Epoch Capabilities Index167.33146.68
Kagi LLM Benchmark—55.2%
CritPt31.7%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), MiniMax-M2.5: 26.9 (#253)

BenchmarkClaude Opus 5.5MiniMax-M2.5
ProofBench100%4%
LMArena Math15061378
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), MiniMax-M2.5: 39.2 (#135)

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena Expert15471379
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
Vectara Hallucination Rate—9.1%

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), MiniMax-M2.5: —

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), MiniMax-M2.5: 47.1 (#152)

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena Non-English15071338
LMArena Chinese15881393
LMArena French15141362
LMArena Russian15201358
LMArena Spanish15071354
LMArena German—1362
LMArena Japanese—1171
LMArena Korean—1232

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), MiniMax-M2.5: 71.5 (#148)

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena Instruction Following15371353

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), MiniMax-M2.5: 37.5 (#216)

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena Longer Query15321366
CL-bench—11.4%
CL-bench Life—6.3%

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), MiniMax-M2.5: 53.9 (#153)

BenchmarkClaude Opus 5.5MiniMax-M2.5
LMArena Text15151359
LMArena Creative Writing15331331
EQ-Bench Creative Writing20501361
LMArena Multi-Turn14991364

Frequently asked questions

Is Claude Opus 5.5 better than MiniMax-M2.5?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 38.3 on the Noometry Index. MiniMax-M2.5 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-M2.5?

MiniMax-M2.5 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-M2.5 better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 48.1 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 5.5 does, with 1M tokens against 205K.

How many benchmarks do Claude Opus 5.5 and MiniMax-M2.5 share?

23 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and MiniMax-M2.5 has 33.

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