Noometry

Model comparison

GPT-5.5 Instant vs MiMo-V2.6-Pro

MiMo-V2.6-Pro is the stronger model overall, scoring 50.3 to 42.7 on the Noometry Index.

Last verified . 15 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

MiMo-V2.6-Pro Xiaomi

50.3

Rank #49 Confirmed

Summary

  • They share 15 benchmarks with published results for both. GPT-5.5 Instant scores higher in 1 category and MiMo-V2.6-Pro in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where MiMo-V2.6-Pro leads 54.5 to 26.5.
  • The biggest single-benchmark swing is CritPt: 0% for GPT-5.5 Instant and 26.6% for MiMo-V2.6-Pro.
  • MiMo-V2.6-Pro has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantMiMo-V2.6-Pro
ProviderOpenAIXiaomi
Noometry Index42.750.3
Released2026-05-052026-09-21
WeightsProprietaryOpen
Context window—1.05M
Max output—131K
Input $ / M tokens—$0.43
Output $ / M tokens—$0.87
Results tracked2719

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Category by category

Coding MiMo-V2.6-Pro leads

GPT-5.5 Instant: 44.3 (#74), MiMo-V2.6-Pro: 55.5 (#23)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
SciCode48.6%60.9%
LMArena Coding14331534
LMArena WebDev—1629
ALE-Bench—1,158

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, MiMo-V2.6-Pro: 37.5 (#35)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
APEX-Agents—59.5%

Reasoning MiMo-V2.6-Pro leads

GPT-5.5 Instant: 24.9 (#155), MiMo-V2.6-Pro: 43.1 (#50)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
CritPt0%26.6%
LMArena Hard Prompts14261512
Chess Puzzles12%—
Epoch Capabilities Index142.52—

Math MiMo-V2.6-Pro leads

GPT-5.5 Instant: 26.5 (#259), MiMo-V2.6-Pro: 54.5 (#45)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Math14201494
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.1%—
ProofBench—70%

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#74), MiMo-V2.6-Pro: 43.5 (#92)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Expert14091543
GPQA Diamond82.5%—

Multimodal Too close to call

GPT-5.5 Instant: 40.0 (#52), MiMo-V2.6-Pro: 40.8 (#43)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Vision12501264
LMArena Document1403—

Multilingual MiMo-V2.6-Pro leads

GPT-5.5 Instant: 52.8 (#80), MiMo-V2.6-Pro: 56.9 (#14)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Non-English14171474
LMArena Chinese14561529
LMArena Russian14311480
LMArena French1428—
LMArena German1411—
LMArena Japanese1408—
LMArena Korean1392—
LMArena Spanish1429—

Instruction Following MiMo-V2.6-Pro leads

GPT-5.5 Instant: 74.2 (#100), MiMo-V2.6-Pro: 78.2 (#12)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Instruction Following14061493

Long Context MiMo-V2.6-Pro leads

GPT-5.5 Instant: 43.4 (#96), MiMo-V2.6-Pro: 46.0 (#27)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Longer Query14221501

Writing & Preference MiMo-V2.6-Pro leads

GPT-5.5 Instant: 61.8 (#85), MiMo-V2.6-Pro: 66.8 (#33)

BenchmarkGPT-5.5 InstantMiMo-V2.6-Pro
LMArena Text14191492
LMArena Creative Writing14191468
LMArena Multi-Turn14331464

Frequently asked questions

Is GPT-5.5 Instant better than MiMo-V2.6-Pro?

MiMo-V2.6-Pro is the stronger model overall, scoring 50.3 to 42.7 on the Noometry Index.

Is GPT-5.5 Instant or MiMo-V2.6-Pro better for coding?

MiMo-V2.6-Pro scores higher on coding benchmarks: 55.5 versus 44.3 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and MiMo-V2.6-Pro share?

15 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and MiMo-V2.6-Pro has 19.

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