Noometry

Model comparison

GPT-5.5 Instant vs Mixtral 8x22B

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 26.7 on the Noometry Index.

Last verified . 19 shared benchmarks.

GPT-5.5 Instant OpenAI

42.5

Rank #99 Confirmed

Mixtral 8x22B Mistral AI

26.7

Rank #330 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-5.5 Instant scores higher in 8 categories and Mixtral 8x22B in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 15.1.
  • The biggest single-benchmark swing is GPQA Diamond: 82.5% for GPT-5.5 Instant and 34.1% for Mixtral 8x22B.
  • Mixtral 8x22B has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantMixtral 8x22B
ProviderOpenAIMistral AI
Noometry Index42.526.7
Released2026-05-052024-04-17
WeightsProprietaryOpen
Context window—64K
Max output—64K
Input $ / M tokens—$2
Output $ / M tokens—$6
Results tracked2734

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 43.7 (#73), Mixtral 8x22B: 23.8 (#324)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Coding14331166
SciCode48.6%—
WeirdML—3.2%
BigCodeBench Instruct—40.6%
BigCodeBench Complete—50.2%
HumanEval+—72%
MBPP+—64.3%

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, Mixtral 8x22B: 22.8 (#119)

BenchmarkGPT-5.5 InstantMixtral 8x22B
Cybench—7.5%

Reasoning GPT-5.5 Instant leads

GPT-5.5 Instant: 24.2 (#149), Mixtral 8x22B: 19.1 (#246)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Hard Prompts14261150
Epoch Capabilities Index142.48122
CritPt0%—
Chess Puzzles12%—
DTBench—55.1%
ForecastBench—56.3

Math GPT-5.5 Instant leads

GPT-5.5 Instant: 26.1 (#241), Mixtral 8x22B: 21.2 (#271)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Math14201184
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.1%—
Omni-MATH—16.3%
MATH Level 5—24.2%

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#68), Mixtral 8x22B: 15.1 (#288)

BenchmarkGPT-5.5 InstantMixtral 8x22B
GPQA Diamond82.5%34.1%
LMArena Expert14091113
MMLU-Pro—46%
GPQA (HELM)—33.4%
MMLU—77.8%

Multimodal Not comparable

GPT-5.5 Instant: 39.3 (#48), Mixtral 8x22B: —

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Vision1250—
LMArena Document1403—

Multilingual GPT-5.5 Instant leads

GPT-5.5 Instant: 53.0 (#76), Mixtral 8x22B: 32.9 (#250)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Non-English14171128
LMArena Chinese14571116
LMArena French14281165
LMArena German14101141
LMArena Japanese14081037
LMArena Korean13931056
LMArena Russian14301158
LMArena Spanish14301150

Instruction Following GPT-5.5 Instant leads

GPT-5.5 Instant: 74.4 (#94), Mixtral 8x22B: 57.9 (#261)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Instruction Following14071147
IFEval—72.4%

Long Context GPT-5.5 Instant leads

GPT-5.5 Instant: 43.4 (#92), Mixtral 8x22B: 34.6 (#242)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Longer Query14221144

Writing & Preference GPT-5.5 Instant leads

GPT-5.5 Instant: 62.0 (#81), Mixtral 8x22B: 37.1 (#257)

BenchmarkGPT-5.5 InstantMixtral 8x22B
LMArena Text14191162
LMArena Creative Writing14201141
LMArena Multi-Turn14341130
WildBench—71.1%

Frequently asked questions

Is GPT-5.5 Instant better than Mixtral 8x22B?

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 26.7 on the Noometry Index.

Is GPT-5.5 Instant or Mixtral 8x22B better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 23.8 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Mixtral 8x22B share?

19 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Mixtral 8x22B has 34.

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