Noometry

Model comparison

GPT-5.5 Instant vs MiniMax-M2.5

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 38.3 on the Noometry Index.

Last verified . 18 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

MiniMax-M2.5 MiniMax

38.3

Rank #188 Confirmed

Summary

  • They share 18 benchmarks with published results for both. GPT-5.5 Instant scores higher in 6 categories and MiniMax-M2.5 in 2 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 39.2.
  • MiniMax-M2.5 has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantMiniMax-M2.5
ProviderOpenAIMiniMax
Noometry Index42.738.3
Released2026-05-052026-02-12
WeightsProprietaryOpen
Context window—205K
Max output—131K
Input $ / M tokens—$0.30
Output $ / M tokens—$1.20
Results tracked2733

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Category by category

Coding MiniMax-M2.5 leads

GPT-5.5 Instant: 44.3 (#74), MiniMax-M2.5: 48.1 (#58)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Coding14331381
SWE-bench Verified (bash only)—75.8%
LMArena WebDev—1387
SWE-bench Multilingual—68.3%
SciCode48.6%—
ALE-Bench—618.17

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, MiniMax-M2.5: 30.4 (#77)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
Terminal-Bench—42.7%
Vending-Bench 2—-23.16

Reasoning GPT-5.5 Instant leads

GPT-5.5 Instant: 24.9 (#155), MiniMax-M2.5: 17.5 (#292)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Hard Prompts14261372
Epoch Capabilities Index142.52146.68
ARC-AGI-2—4.9%
Kagi LLM Benchmark—55.2%
NYT Connections (extended)—16.8%
ARC-AGI-1—63.7%
CritPt0%—
Chess Puzzles12%—

Math Too close to call

GPT-5.5 Instant: 26.5 (#259), MiniMax-M2.5: 26.9 (#253)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Math14201378
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.1%—
ProofBench—4%

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#74), MiniMax-M2.5: 39.2 (#135)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Expert14091379
GPQA Diamond82.5%—
Vectara Hallucination Rate—9.1%

Multimodal Not comparable

GPT-5.5 Instant: 40.0 (#52), MiniMax-M2.5: —

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Vision1250—
LMArena Document1403—

Multilingual GPT-5.5 Instant leads

GPT-5.5 Instant: 52.8 (#80), MiniMax-M2.5: 47.1 (#152)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Non-English14171338
LMArena Chinese14561393
LMArena French14281362
LMArena German14111362
LMArena Japanese14081171
LMArena Korean13921232
LMArena Russian14311358
LMArena Spanish14291354

Instruction Following GPT-5.5 Instant leads

GPT-5.5 Instant: 74.2 (#100), MiniMax-M2.5: 71.5 (#148)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Instruction Following14061353

Long Context GPT-5.5 Instant leads

GPT-5.5 Instant: 43.4 (#96), MiniMax-M2.5: 37.5 (#216)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Longer Query14221366
CL-bench—11.4%
CL-bench Life—6.3%

Writing & Preference GPT-5.5 Instant leads

GPT-5.5 Instant: 61.8 (#85), MiniMax-M2.5: 53.9 (#153)

BenchmarkGPT-5.5 InstantMiniMax-M2.5
LMArena Text14191359
LMArena Creative Writing14191331
LMArena Multi-Turn14331364
EQ-Bench Creative Writing—1361

Frequently asked questions

Is GPT-5.5 Instant better than MiniMax-M2.5?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 38.3 on the Noometry Index.

Is GPT-5.5 Instant or MiniMax-M2.5 better for coding?

MiniMax-M2.5 scores higher on coding benchmarks: 48.1 versus 44.3 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and MiniMax-M2.5 share?

18 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and MiniMax-M2.5 has 33.

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