Noometry

Model comparison

GPT-5.5 Instant vs Mixtral 8x7B

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 26.8 on the Noometry Index.

Last verified . 19 shared benchmarks.

GPT-5.5 Instant OpenAI

42.5

Rank #99 Confirmed

Mixtral 8x7B Mistral AI

26.8

Rank #328 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-5.5 Instant scores higher in 8 categories and Mixtral 8x7B 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 11.0.
  • The biggest single-benchmark swing is GPQA Diamond: 82.5% for GPT-5.5 Instant and 30.6% for Mixtral 8x7B.
  • Mixtral 8x7B has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantMixtral 8x7B
ProviderOpenAIMistral AI
Noometry Index42.526.8
Released2026-05-052023-12-11
WeightsProprietaryOpen
Context window—32K
Max output—32K
Input $ / M tokens—$0.70
Output $ / M tokens—$0.70
Results tracked2738

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 43.7 (#73), Mixtral 8x7B: 32.2 (#265)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Coding14331127
SciCode48.6%—
HumanEval+—39.6%
MBPP+—49.7%

Reasoning GPT-5.5 Instant leads

GPT-5.5 Instant: 24.2 (#149), Mixtral 8x7B: 17.4 (#283)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Hard Prompts14261115
Epoch Capabilities Index142.48118.38
CritPt0%—
Chess Puzzles12%—
DTBench—49.6%
Adversarial NLI—55.2%
ForecastBench—56.3
HellaSwag—86.7%
PIQA—83.6%
WinoGrande—77.2%

Math GPT-5.5 Instant leads

GPT-5.5 Instant: 26.1 (#241), Mixtral 8x7B: 17.2 (#284)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Math14201147
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.1%—
Omni-MATH—10.5%
MATH Level 5—10%
GSM8K—74.4%

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#68), Mixtral 8x7B: 11.0 (#296)

BenchmarkGPT-5.5 InstantMixtral 8x7B
GPQA Diamond82.5%30.6%
LMArena Expert14091088
MMLU-Pro—33.5%
GPQA (HELM)—29.6%
ARC (AI2) Challenge—87.3%
MMLU—70.6%
OpenBookQA—85.8%
TriviaQA—82.2%

Multimodal Not comparable

GPT-5.5 Instant: 39.3 (#48), Mixtral 8x7B: —

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Vision1250—
LMArena Document1403—

Multilingual GPT-5.5 Instant leads

GPT-5.5 Instant: 53.0 (#76), Mixtral 8x7B: 29.8 (#261)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Non-English14171077
LMArena Chinese14571055
LMArena French14281165
LMArena German14101114
LMArena Japanese1408931
LMArena Korean1393968
LMArena Russian14301090
LMArena Spanish14301110

Instruction Following GPT-5.5 Instant leads

GPT-5.5 Instant: 74.4 (#94), Mixtral 8x7B: 51.2 (#292)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Instruction Following14071110
IFEval—57.5%

Long Context GPT-5.5 Instant leads

GPT-5.5 Instant: 43.4 (#92), Mixtral 8x7B: 33.4 (#255)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Longer Query14221103

Writing & Preference GPT-5.5 Instant leads

GPT-5.5 Instant: 62.0 (#81), Mixtral 8x7B: 34.4 (#265)

BenchmarkGPT-5.5 InstantMixtral 8x7B
LMArena Text14191132
LMArena Creative Writing14201109
LMArena Multi-Turn14341115
WildBench—67.3%

Frequently asked questions

Is GPT-5.5 Instant better than Mixtral 8x7B?

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 26.8 on the Noometry Index.

Is GPT-5.5 Instant or Mixtral 8x7B better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 32.2 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Mixtral 8x7B share?

19 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Mixtral 8x7B has 38.

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