Noometry

Model comparison

GPT-5.4 mini vs Mistral Medium 3.5

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 40.2 on the Noometry Index.

Last verified . 21 shared benchmarks.

GPT-5.4 mini OpenAI

45.0

Rank #76 Confirmed

Mistral Medium 3.5 Mistral AI

40.2

Rank #152 Confirmed

Summary

  • They share 21 benchmarks with published results for both. GPT-5.4 mini scores higher in 7 categories and Mistral Medium 3.5 in 2 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-5.4 mini leads 30.4 to 17.3.
  • The biggest single-benchmark swing is NYT Connections (extended): 61.8% for GPT-5.4 mini and 12.9% for Mistral Medium 3.5.
  • GPT-5.4 mini is cheaper at $0.75 / $4.50 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
  • GPT-5.4 mini accepts more context: 400K tokens versus 262K.
  • Mistral Medium 3.5 has downloadable open weights; the other is API-only.

Side by side

GPT-5.4 miniMistral Medium 3.5
ProviderOpenAIMistral AI
Noometry Index45.040.2
Released2026-03-17—
WeightsProprietaryOpen
Context window400K262K
Max output128K210K
Input $ / M tokens$0.75$1.50
Output $ / M tokens$4.50$7.50
Results tracked4622

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Category by category

Coding GPT-5.4 mini leads

GPT-5.4 mini: 45.2 (#72), Mistral Medium 3.5: 36.0 (#213)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena WebDev13971264
LMArena Coding14381461
FrontierCode27%—
SciCode49.9%—
WeirdML60.3%—
ALE-Bench1,189—

Agentic & Tool Use Not comparable

GPT-5.4 mini: 29.9 (#81), Mistral Medium 3.5: —

BenchmarkGPT-5.4 miniMistral Medium 3.5
DeepResearch Bench36.3%—

Reasoning GPT-5.4 mini leads

GPT-5.4 mini: 30.4 (#85), Mistral Medium 3.5: 17.3 (#295)

BenchmarkGPT-5.4 miniMistral Medium 3.5
Kagi LLM Benchmark37.9%41.4%
NYT Connections (extended)61.8%12.9%
LMArena Hard Prompts14241436
Epoch Capabilities Index148.84141.35
ARC-AGI-218.9%—
ARC-AGI-163.7%—
CritPt10%—
Chess Puzzles24%—
Thematic Generalization61.7%—
Mystery Game Puzzles11%—
DTBench80%—
LMCA40.8%—
ForecastBench57—

Math GPT-5.4 mini leads

GPT-5.4 mini: 45.5 (#75), Mistral Medium 3.5: 39.1 (#113)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Math14191431
FrontierMath (Tiers 1-3)51.2%—
FrontierMath Tier 49.8%—
OTIS Mock AIME 2024-202588.9%—
ProofBench21%—
FrontierMath (Feb 2025 set)28.3%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge GPT-5.4 mini leads

GPT-5.4 mini: 51.5 (#67), Mistral Medium 3.5: 40.0 (#126)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Expert14351432
GPQA Diamond86.9%—
SimpleQA Verified29.4%—
Vectara Hallucination Rate5.5%—

Multimodal GPT-5.4 mini leads

GPT-5.4 mini: 39.7 (#56), Mistral Medium 3.5: 38.3 (#65)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Vision12451223

Multilingual Too close to call

GPT-5.4 mini: 51.9 (#96), Mistral Medium 3.5: 51.9 (#100)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Non-English14051404
LMArena Chinese14461442
LMArena French14401448
LMArena German14091451
LMArena Korean13681385
LMArena Russian14171395
LMArena Spanish14051409
LMArena Japanese1374—

Instruction Following Too close to call

GPT-5.4 mini: 74.1 (#102), Mistral Medium 3.5: 74.6 (#90)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Instruction Following14051415

Long Context Too close to call

GPT-5.4 mini: 43.0 (#112), Mistral Medium 3.5: 43.2 (#103)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Longer Query14071415

Writing & Preference GPT-5.4 mini leads

GPT-5.4 mini: 64.0 (#58), Mistral Medium 3.5: 58.5 (#117)

BenchmarkGPT-5.4 miniMistral Medium 3.5
LMArena Text14121421
LMArena Creative Writing13701374
LMArena Multi-Turn14291423
EQ-Bench Creative Writing1665—
EQ-Bench 4—993

Frequently asked questions

Is GPT-5.4 mini better than Mistral Medium 3.5?

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 40.2 on the Noometry Index.

Which is cheaper, GPT-5.4 mini or Mistral Medium 3.5?

GPT-5.4 mini is cheaper. It lists at $0.75 per million input tokens and $4.50 per million output tokens; Mistral Medium 3.5 lists at $1.50 and $7.50.

Is GPT-5.4 mini or Mistral Medium 3.5 better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.2 versus 36.0 in the Noometry coding category.

Which has the bigger context window?

GPT-5.4 mini does, with 400K tokens against 262K.

How many benchmarks do GPT-5.4 mini and Mistral Medium 3.5 share?

21 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Mistral Medium 3.5 has 22.

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