Model Comparison

Grok-1.5 vs Pixtral-12BWhich is better in 2026?

Grok-1.5 shows notably better performance in the majority of benchmarks.

Verdict: Grok-1.5 vs Pixtral-12B — which is better?

Grok-1.5 (by xAI) and Pixtral-12B (by Mistral AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Grok-1.5 outperforms in 4 benchmarks (HumanEval, MATH, MMLU, MMMU), while Pixtral-12B is better at 2 benchmarks (DocVQA, MathVista). Grok-1.5 shows notably better performance in the majority of benchmarks.

Choose Grok-1.5 if…

  • you want the strongest raw capability — it leads on 4 of 6 shared benchmarks

Choose Pixtral-12B if…

  • you want the most recent training data — it shipped Sep 2024
  • you need open weights you can self-host or fine-tune
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Grok-1.5 outperforms in 4 benchmarks (HumanEval, MATH, MMLU, MMMU), while Pixtral-12B is better at 2 benchmarks (DocVQA, MathVista).

Grok-1.5 shows notably better performance in the majority of benchmarks.

Mon Jun 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Pixtral-12B specifies input context (128,000 tokens). Only Pixtral-12B specifies output context (8,192 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
Mistral AI
Pixtral-12B
Input128,000 tokens
Output8,192 tokens
Mon Jun 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Pixtral-12B supports multimodal inputs, whereas Grok-1.5 does not.

Pixtral-12B can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok-1.5

Text
Images
Audio
Video

Pixtral-12B

Text
Images
Audio
Video

License

Usage and distribution terms

Grok-1.5 is licensed under a proprietary license, while Pixtral-12B uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Grok-1.5

Proprietary

Closed source

Pixtral-12B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while Pixtral-12B was released on 2024-09-17.

Pixtral-12B is 6 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.2 years ago

Pixtral-12B

Sep 17, 2024

1.7 years ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Higher HumanEval score (74.1% vs 72.0%)
Higher MATH score (50.6% vs 48.1%)
Higher MMLU score (81.3% vs 69.2%)
Higher MMMU score (53.6% vs 52.5%)
Mistral AI
Larger context window (128,000 tokens)
Supports multimodal inputs
Has open weights
Higher DocVQA score (90.7% vs 85.6%)
Higher MathVista score (58.0% vs 52.8%)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-1.5
Mistral AI
Pixtral-12B

FAQ

Common questions about Grok-1.5 vs Pixtral-12B.

Which is better, Grok-1.5 or Pixtral-12B?

Grok-1.5 shows notably better performance in the majority of benchmarks. Grok-1.5 is made by xAI and Pixtral-12B is made by Mistral AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok-1.5 compare to Pixtral-12B in benchmarks?

Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. Pixtral-12B scores DocVQA: 90.7%, ChartQA: 81.8%, VQAv2: 78.6%, MT-Bench: 76.8%, HumanEval: 72.0%.

What are the context window sizes for Grok-1.5 and Pixtral-12B?

Grok-1.5 supports an unknown number of tokens and Pixtral-12B supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok-1.5 and Pixtral-12B?

Key differences include multimodal support (no vs yes), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-1.5 and Pixtral-12B?

Grok-1.5 is developed by xAI and Pixtral-12B is developed by Mistral AI.

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