Noometry

Model comparison

GPT-6 Astra vs Pixtral 12B

GPT-6 Astra has enough public results to be ranked (#1); Pixtral 12B does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

GPT-6 Astra OpenAI

70.8

Rank #1 Confirmed

Pixtral 12B Mistral AI

31.3

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. GPT-6 Astra 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 GPT-6 Astra leads 55.0 to 23.9.
  • Pixtral 12B is cheaper at $0.15 / $0.15 per million input/output tokens, against $10 / $50 for GPT-6 Astra.
  • GPT-6 Astra accepts more context: 1.05M tokens versus 128K.
  • Pixtral 12B has downloadable open weights; the other is API-only.

Side by side

GPT-6 AstraPixtral 12B
ProviderOpenAIMistral AI
Noometry Index70.831.3
Released2026-09-032024-09-01
WeightsProprietaryOpen
Context window1.05M128K
Max output128K128K
Input $ / M tokens$10$0.15
Output $ / M tokens$50$0.15
Results tracked562

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Category by category

Coding Not comparable

GPT-6 Astra: 73.7 (#2), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
DeepSWE74.1%—
FrontierCode53.3%—
LMArena WebDev1786—
FrontierSWE65.5%—
SciCode56.5%—
GSO79.4%—
WeirdML93.6%—
LMArena Coding1487—
MirrorCode46.7%—
ALE-Bench2,951—

Agentic & Tool Use Not comparable

GPT-6 Astra: 52.9 (#3), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
APEX-Agents64.7%—
Remote Labor Index20.8%—
BALROG68.3%—
GDP.pdf34.2%—
Vending-Bench 215,515—

Reasoning Not comparable

GPT-6 Astra: 85.1 (#1), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
ARC-AGI-295%—
NYT Connections (extended)98.1%—
ARC-AGI-198.5%—
CritPt31.7%—
Chess Puzzles72%—
EBR-Bench76.2%—
LMArena Hard Prompts1462—
Mystery Game Puzzles84%—
DTBench97.3%—
LMCA64.4%—
Bench to the Future 30.14—
Epoch Capabilities Index166.45—

Math Not comparable

GPT-6 Astra: 93.5 (#2), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
FrontierMath (Tiers 1-3)93.7%—
FrontierMath Tier 497.6%—
OTIS Mock AIME 2024-2025100%—
ProofBench99%—
LMArena Math1465—
FrontierMath Erdős2.9%—

Knowledge Not comparable

GPT-6 Astra: 75.3 (#1), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
GPQA Diamond95.8%—
Humanity's Last Exam54.8%—
SimpleQA Verified75.6%—
Vectara Hallucination Rate8.7%—
LMArena Expert1483—

Multimodal GPT-6 Astra leads

GPT-6 Astra: 55.0 (#3), Pixtral 12B: 23.9 (#127)

BenchmarkGPT-6 AstraPixtral 12B
LMArena Vision12811009
GeoBench—37%
Blueprint-Bench 249.7%—
Furniture Assembly80%—
LMArena Document1468—

Multilingual Not comparable

GPT-6 Astra: 53.7 (#61), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
LMArena Non-English1430—
LMArena Chinese1484—
LMArena French1456—
LMArena German1440—
LMArena Japanese1379—
LMArena Korean1426—
LMArena Russian1436—
LMArena Spanish1407—

Instruction Following Not comparable

GPT-6 Astra: 76.3 (#44), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
LMArena Instruction Following1450—

Long Context Not comparable

GPT-6 Astra: 44.5 (#62), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
LMArena Longer Query1456—

Writing & Preference Not comparable

GPT-6 Astra: 75.3 (#7), Pixtral 12B: —

BenchmarkGPT-6 AstraPixtral 12B
LMArena Text1441—
LMArena Creative Writing1418—
EQ-Bench Creative Writing2173—
LMArena Multi-Turn1448—

Frequently asked questions

Is GPT-6 Astra better than Pixtral 12B?

GPT-6 Astra has enough public results to be ranked (#1); Pixtral 12B does not yet, so treat this comparison as directional.

Which is cheaper, GPT-6 Astra or Pixtral 12B?

Pixtral 12B is cheaper. It lists at $0.15 per million input tokens and $0.15 per million output tokens; GPT-6 Astra lists at $10 and $50.

Which has the bigger context window?

GPT-6 Astra does, with 1.05M tokens against 128K.

How many benchmarks do GPT-6 Astra and Pixtral 12B share?

1 benchmark has published results for both models. GPT-6 Astra has 56 scored results on Noometry and Pixtral 12B has 2.

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