Noometry

Model comparison

Grok 4.5 vs Pixtral 12B

Grok 4.5 has enough public results to be ranked (#25); Pixtral 12B does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Grok 4.5 xAI

55.0

Rank #25 Confirmed

Pixtral 12B Mistral AI

31.3

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Grok 4.5 scores higher in 1 category and Pixtral 12B in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in multimodal, where Grok 4.5 leads 37.6 to 23.9.
  • Pixtral 12B is cheaper at $0.15 / $0.15 per million input/output tokens, against $2 / $6 for Grok 4.5.
  • Grok 4.5 accepts more context: 500K tokens versus 128K.
  • Pixtral 12B has downloadable open weights; the other is API-only.

Side by side

Grok 4.5Pixtral 12B
ProviderxAIMistral AI
Noometry Index55.031.3
Released2026-07-082024-09-01
WeightsProprietaryOpen
Context window500K128K
Max output500K128K
Input $ / M tokens$2$0.15
Output $ / M tokens$6$0.15
Results tracked522

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Category by category

Coding Not comparable

Grok 4.5: 52.2 (#35), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
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), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
APEX-Agents56.2%—
τ²-bench Banking47.9%—
PostTrainBench23.4%—
GBAEval65.4%—
GDP.pdf14%—
LMArena Search1213—
Vending-Bench 23,887—

Reasoning Not comparable

Grok 4.5: 56.1 (#25), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
ARC-AGI-252.6%—
SimpleBench70%—
Kagi LLM Benchmark83.5%—
NYT Connections (extended)79.9%—
ARC-AGI-187.2%—
CritPt15.4%—
Chess Puzzles36%—
LMArena Hard Prompts1462—
DTBench96.5%—
LMCA45.2%—
Surface Evolver Bench74.4%—
Epoch Capabilities Index153.92—

Math Not comparable

Grok 4.5: 60.9 (#35), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
FrontierMath (Tiers 1-3)57.2%—
FrontierMath Tier 424.4%—
OTIS Mock AIME 2024-202597.8%—
ProofBench31%—
LMArena Math1459—

Knowledge Not comparable

Grok 4.5: 62.3 (#24), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
GPQA Diamond93.4%—
SimpleQA Verified48.3%—
LMArena Expert1466—

Multimodal Grok 4.5 leads

Grok 4.5: 37.6 (#72), Pixtral 12B: 23.9 (#127)

BenchmarkGrok 4.5Pixtral 12B
LMArena Vision12881009
GeoBench—37%
Blueprint-Bench 227.3%—
Furniture Assembly22.5%—
LMArena Document1452—

Multilingual Not comparable

Grok 4.5: 54.4 (#42), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
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), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
LMArena Instruction Following1446—

Long Context Not comparable

Grok 4.5: 44.8 (#56), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
LMArena Longer Query1463—

Writing & Preference Not comparable

Grok 4.5: 65.8 (#42), Pixtral 12B: —

BenchmarkGrok 4.5Pixtral 12B
LMArena Text1448—
LMArena Creative Writing1442—
EQ-Bench Creative Writing1579—
LMArena Multi-Turn1456—

Frequently asked questions

Is Grok 4.5 better than Pixtral 12B?

Grok 4.5 has enough public results to be ranked (#25); Pixtral 12B does not yet, so treat this comparison as directional.

Which is cheaper, Grok 4.5 or Pixtral 12B?

Pixtral 12B is cheaper. It lists at $0.15 per million input tokens and $0.15 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 128K.

How many benchmarks do Grok 4.5 and Pixtral 12B share?

1 benchmark has published results for both models. Grok 4.5 has 52 scored results on Noometry and Pixtral 12B has 2.

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