Noometry

Model comparison

GPT-5.3 Chat vs MiMo-V2.6-Pro

MiMo-V2.6-Pro is the stronger model overall, scoring 50.3 to 42.8 on the Noometry Index.

Last verified . 12 shared benchmarks.

GPT-5.3 Chat OpenAI

42.8

Rank #109 Confirmed

MiMo-V2.6-Pro Xiaomi

50.3

Rank #49 Confirmed

Summary

  • They share 12 benchmarks with published results for both. GPT-5.3 Chat scores higher in 0 categories 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 38.2.
  • MiMo-V2.6-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
  • MiMo-V2.6-Pro accepts more context: 1.05M tokens versus 128K.
  • MiMo-V2.6-Pro has downloadable open weights; the other is API-only.

Side by side

GPT-5.3 ChatMiMo-V2.6-Pro
ProviderOpenAIXiaomi
Noometry Index42.850.3
Released2026-03-032026-09-21
WeightsProprietaryOpen
Context window128K1.05M
Max output16K131K
Input $ / M tokens$1.75$0.43
Output $ / M tokens$14$0.87
Results tracked1819

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Category by category

Coding MiMo-V2.6-Pro leads

GPT-5.3 Chat: 41.4 (#124), MiMo-V2.6-Pro: 55.5 (#23)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Coding14081534
LMArena WebDev—1629
SciCode—60.9%
ALE-Bench—1,158

Agentic & Tool Use Not comparable

GPT-5.3 Chat: —, MiMo-V2.6-Pro: 37.5 (#35)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
APEX-Agents—59.5%

Reasoning MiMo-V2.6-Pro leads

GPT-5.3 Chat: 28.5 (#102), MiMo-V2.6-Pro: 43.1 (#50)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Hard Prompts13991512
CritPt—26.6%

Math MiMo-V2.6-Pro leads

GPT-5.3 Chat: 38.2 (#142), MiMo-V2.6-Pro: 54.5 (#45)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Math13891494
ProofBench—70%

Knowledge MiMo-V2.6-Pro leads

GPT-5.3 Chat: 38.8 (#140), MiMo-V2.6-Pro: 43.5 (#92)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Expert13971543

Multimodal Not comparable

GPT-5.3 Chat: —, MiMo-V2.6-Pro: 40.8 (#43)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Vision—1264

Multilingual MiMo-V2.6-Pro leads

GPT-5.3 Chat: 50.3 (#124), MiMo-V2.6-Pro: 56.9 (#14)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Non-English13821474
LMArena Chinese14321529
LMArena Russian14001480
LMArena French1397—
LMArena German1384—
LMArena Japanese1352—
LMArena Korean1346—
LMArena Spanish1371—

Instruction Following MiMo-V2.6-Pro leads

GPT-5.3 Chat: 72.8 (#129), MiMo-V2.6-Pro: 78.2 (#12)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Instruction Following13781493

Long Context MiMo-V2.6-Pro leads

GPT-5.3 Chat: 42.6 (#120), MiMo-V2.6-Pro: 46.0 (#27)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Longer Query13961501

Writing & Preference MiMo-V2.6-Pro leads

GPT-5.3 Chat: 63.1 (#68), MiMo-V2.6-Pro: 66.8 (#33)

BenchmarkGPT-5.3 ChatMiMo-V2.6-Pro
LMArena Text13891492
LMArena Creative Writing13551468
LMArena Multi-Turn14121464
EQ-Bench Creative Writing1690—

Frequently asked questions

Is GPT-5.3 Chat better than MiMo-V2.6-Pro?

MiMo-V2.6-Pro is the stronger model overall, scoring 50.3 to 42.8 on the Noometry Index.

Which is cheaper, GPT-5.3 Chat or MiMo-V2.6-Pro?

MiMo-V2.6-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

Is GPT-5.3 Chat or MiMo-V2.6-Pro better for coding?

MiMo-V2.6-Pro scores higher on coding benchmarks: 55.5 versus 41.4 in the Noometry coding category.

Which has the bigger context window?

MiMo-V2.6-Pro does, with 1.05M tokens against 128K.

How many benchmarks do GPT-5.3 Chat and MiMo-V2.6-Pro share?

12 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and MiMo-V2.6-Pro has 19.

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