Noometry

Model comparison

GPT-5.5 Instant vs Mistral Large

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 31.9 on the Noometry Index.

Last verified . 22 shared benchmarks.

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

Mistral Large Mistral AI

31.9

Rank #263 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GPT-5.5 Instant scores higher in 8 categories and Mistral Large in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where GPT-5.5 Instant leads 61.8 to 40.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.1% for GPT-5.5 Instant and 8.5% for Mistral Large.
  • Mistral Large has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantMistral Large
ProviderOpenAIMistral AI
Noometry Index42.731.9
Released2026-05-052024-02-26
WeightsProprietaryOpen
Context window—131K
Max output—16K
Input $ / M tokens—$2
Output $ / M tokens—$6
Results tracked2751

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 44.3 (#74), Mistral Large: 34.3 (#240)

BenchmarkGPT-5.5 InstantMistral Large
SciCode48.6%36.2%
LMArena Coding14331277
BigCodeBench Instruct—30%
LiveBench Coding—47.1%
BigCodeBench Complete—38.3%
ALE-Bench—264.7
HumanEval+—62.2%
MBPP+—59.5%

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, Mistral Large: 28.6 (#89)

BenchmarkGPT-5.5 InstantMistral Large
Berkeley Function Calling Leaderboard—38.4%

Reasoning GPT-5.5 Instant leads

GPT-5.5 Instant: 24.9 (#155), Mistral Large: 15.8 (#310)

BenchmarkGPT-5.5 InstantMistral Large
CritPt0%0%
LMArena Hard Prompts14261257
Epoch Capabilities Index142.52128.52
SimpleBench—22.5%
Chess Puzzles12%—
LiveBench Reasoning—43.5%
DTBench—65.1%
LiveBench Data Analysis—50.1%
LMCA—16.7%
ForecastBench—57.1
LiveBench—48.4%

Math GPT-5.5 Instant leads

GPT-5.5 Instant: 26.5 (#259), Mistral Large: 18.2 (#291)

BenchmarkGPT-5.5 InstantMistral Large
OTIS Mock AIME 2024-202568.1%8.5%
LMArena Math14201262
FrontierMath (Tiers 1-3)26.3%—
FrontierMath Tier 42.4%—
Omni-MATH—28.1%
LiveBench Math—42.5%
MATH Level 5—50.3%
FrontierMath (Feb 2025 set)—0.3%

Knowledge GPT-5.5 Instant leads

GPT-5.5 Instant: 48.9 (#74), Mistral Large: 30.1 (#230)

BenchmarkGPT-5.5 InstantMistral Large
GPQA Diamond82.5%51.3%
LMArena Expert14091232
MMLU-Pro—59.9%
Confabulations—21.4%
Vectara Hallucination Rate—4.5%
GPQA (HELM)—43.5%
MMLU—80%

Multimodal Not comparable

GPT-5.5 Instant: 40.0 (#52), Mistral Large: —

BenchmarkGPT-5.5 InstantMistral Large
LMArena Vision1250—
LMArena Document1403—

Multilingual GPT-5.5 Instant leads

GPT-5.5 Instant: 52.8 (#80), Mistral Large: 40.0 (#219)

BenchmarkGPT-5.5 InstantMistral Large
LMArena Non-English14171237
LMArena Chinese14561240
LMArena French14281325
LMArena German14111254
LMArena Japanese14081188
LMArena Korean13921202
LMArena Russian14311257
LMArena Spanish14291268

Instruction Following GPT-5.5 Instant leads

GPT-5.5 Instant: 74.2 (#100), Mistral Large: 67.9 (#191)

BenchmarkGPT-5.5 InstantMistral Large
LMArena Instruction Following14061249
LiveBench Instruction Following—67.9%
IFEval—87.7%

Long Context GPT-5.5 Instant leads

GPT-5.5 Instant: 43.4 (#96), Mistral Large: 38.3 (#199)

BenchmarkGPT-5.5 InstantMistral Large
LMArena Longer Query14221261

Writing & Preference GPT-5.5 Instant leads

GPT-5.5 Instant: 61.8 (#85), Mistral Large: 40.7 (#242)

BenchmarkGPT-5.5 InstantMistral Large
LMArena Text14191266
LMArena Creative Writing14191243
LMArena Multi-Turn14331260
Short-Story Creative Writing—69%
EQ-Bench Creative Writing—985
WildBench—80.1%
LiveBench Language—39.4%

Frequently asked questions

Is GPT-5.5 Instant better than Mistral Large?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 31.9 on the Noometry Index.

Is GPT-5.5 Instant or Mistral Large better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 34.3 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Mistral Large share?

22 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Mistral Large has 51.

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