Noometry

Model comparison

Grok 4.5 vs Mistral Small 3.2

Grok 4.5 is the stronger model overall, scoring 55.0 to 31.2 on the Noometry Index. Mistral Small 3.2 costs 23× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

Last verified . 6 shared benchmarks.

Grok 4.5 xAI

55.0

Rank #25 Confirmed

Mistral Small 3.2 Mistral AI

31.2

Rank #280 Confirmed

Summary

  • They share 6 benchmarks with published results for both. Grok 4.5 scores higher in 4 categories and Mistral Small 3.2 in 0 categories; 4 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 18.1.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 97.8% for Grok 4.5 and 30.3% for Mistral Small 3.2.
  • Mistral Small 3.2 is cheaper at $0.0938 / $0.25 per million input/output tokens, against $2 / $6 for Grok 4.5.
  • Grok 4.5 accepts more context: 500K tokens versus 256K.
  • Mistral Small 3.2 has downloadable open weights; the other is API-only.

Side by side

Grok 4.5Mistral Small 3.2
ProviderxAIMistral AI
Noometry Index55.031.2
Released2026-07-082025-06-20
WeightsProprietaryOpen
Context window500K256K
Max output500K16K
Input $ / M tokens$2$0.0938
Output $ / M tokens$6$0.25
Results tracked526

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Category by category

Coding Not comparable

Grok 4.5: 52.2 (#35), Mistral Small 3.2: —

BenchmarkGrok 4.5Mistral Small 3.2
DeepSWE53.8%—
FrontierCode42.4%—
LMArena WebDev1553—
SciCode54.1%—
WeirdML46.4%—
LMArena Coding1474—
ALE-Bench1,309—

Agentic & Tool Use Not comparable

Grok 4.5: 44.4 (#17), Mistral Small 3.2: —

BenchmarkGrok 4.5Mistral Small 3.2
APEX-Agents56.2%—
τ²-bench Banking47.9%—
PostTrainBench23.4%—
GBAEval65.4%—
GDP.pdf14%—
LMArena Search1213—
Vending-Bench 23,887—

Reasoning Grok 4.5 leads

Grok 4.5: 56.1 (#25), Mistral Small 3.2: 18.1 (#287)

BenchmarkGrok 4.5Mistral Small 3.2
Kagi LLM Benchmark83.5%40.4%
Chess Puzzles36%1%
Epoch Capabilities Index153.92131.74
ARC-AGI-252.6%—
SimpleBench70%—
NYT Connections (extended)79.9%—
ARC-AGI-187.2%—
CritPt15.4%—
LMArena Hard Prompts1462—
DTBench96.5%—
LMCA45.2%—
Surface Evolver Bench74.4%—

Math Grok 4.5 leads

Grok 4.5: 60.9 (#35), Mistral Small 3.2: 26.3 (#260)

BenchmarkGrok 4.5Mistral Small 3.2
OTIS Mock AIME 2024-202597.8%30.3%
FrontierMath (Tiers 1-3)57.2%—
FrontierMath Tier 424.4%—
ProofBench31%—
LMArena Math1459—

Knowledge Grok 4.5 leads

Grok 4.5: 62.3 (#24), Mistral Small 3.2: 26.7 (#256)

BenchmarkGrok 4.5Mistral Small 3.2
GPQA Diamond93.4%49.1%
SimpleQA Verified48.3%—
LMArena Expert1466—

Multimodal Not comparable

Grok 4.5: 37.6 (#72), Mistral Small 3.2: —

BenchmarkGrok 4.5Mistral Small 3.2
LMArena Vision1288—
Blueprint-Bench 227.3%—
Furniture Assembly22.5%—
LMArena Document1452—

Multilingual Not comparable

Grok 4.5: 54.4 (#42), Mistral Small 3.2: —

BenchmarkGrok 4.5Mistral Small 3.2
LMArena Non-English1440—
LMArena Chinese1496—
LMArena French1456—
LMArena German1446—
LMArena Japanese1428—
LMArena Korean1404—
LMArena Russian1448—
LMArena Spanish1450—

Instruction Following Not comparable

Grok 4.5: 76.0 (#48), Mistral Small 3.2: —

BenchmarkGrok 4.5Mistral Small 3.2
LMArena Instruction Following1446—

Long Context Not comparable

Grok 4.5: 44.8 (#56), Mistral Small 3.2: —

BenchmarkGrok 4.5Mistral Small 3.2
LMArena Longer Query1463—

Writing & Preference Grok 4.5 leads

Grok 4.5: 65.8 (#42), Mistral Small 3.2: 45.0 (#224)

BenchmarkGrok 4.5Mistral Small 3.2
EQ-Bench Creative Writing15791255
LMArena Text1448—
LMArena Creative Writing1442—
LMArena Multi-Turn1456—

Frequently asked questions

Is Grok 4.5 better than Mistral Small 3.2?

Grok 4.5 is the stronger model overall, scoring 55.0 to 31.2 on the Noometry Index. Mistral Small 3.2 costs 23× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

Which is cheaper, Grok 4.5 or Mistral Small 3.2?

Mistral Small 3.2 is cheaper. It lists at $0.0938 per million input tokens and $0.25 per million output tokens; Grok 4.5 lists at $2 and $6.

Which has the bigger context window?

Grok 4.5 does, with 500K tokens against 256K.

How many benchmarks do Grok 4.5 and Mistral Small 3.2 share?

6 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Mistral Small 3.2 has 6.

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