Model Comparison

Devstral Small 1.1 vs Grok-4 HeavyWhich is better in 2026?

Comparing Devstral Small 1.1 and Grok-4 Heavy across benchmarks, pricing, and capabilities.

Verdict: Devstral Small 1.1 vs Grok-4 Heavy — which is better?

Devstral Small 1.1 (by Mistral AI) and Grok-4 Heavy (by xAI) 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.

Choose Devstral Small 1.1 if…

  • you need open weights you can self-host or fine-tune

Choose Grok-4 Heavy if…

  • you are already invested in the xAI ecosystem
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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Devstral Small 1.1 and Grok-4 Heavydon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Devstral Small 1.1 specifies input context (128,000 tokens). Only Devstral Small 1.1 specifies output context (128,000 tokens).

Mistral AI
Devstral Small 1.1
Input128,000 tokens
Output128,000 tokens
xAI
Grok-4 Heavy
Input- tokens
Output- tokens
Wed Jun 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 Heavy supports multimodal inputs, whereas Devstral Small 1.1 does not.

Grok-4 Heavy can handle both text and other forms of data like images, making it suitable for multimodal applications.

Devstral Small 1.1

Text
Images
Audio
Video

Grok-4 Heavy

Text
Images
Audio
Video

License

Usage and distribution terms

Devstral Small 1.1 is licensed under Apache 2.0, while Grok-4 Heavy uses a proprietary license.

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

Devstral Small 1.1

Apache 2.0

Open weights

Grok-4 Heavy

Proprietary

Closed source

Release Timeline

When each model was launched

Devstral Small 1.1 was released on 2025-07-11, while Grok-4 Heavy's release date is not specified.

We can confirm Devstral Small 1.1's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

Devstral Small 1.1

Jul 11, 2025

11 months ago

Grok-4 Heavy

—

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while Devstral Small 1.1's cutoff date is not specified.

We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without Devstral Small 1.1's cutoff date.

Devstral Small 1.1

—

Grok-4 Heavy

Dec 2024

Outputs Comparison

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Key Takeaways

Mistral AI
Larger context window (128,000 tokens)
Has open weights
xAI
Supports multimodal inputs

Detailed Comparison

AI Model Comparison Table
Feature
Mistral AI
Devstral Small 1.1
xAI
Grok-4 Heavy

FAQ

Common questions about Devstral Small 1.1 vs Grok-4 Heavy.

Which is better, Devstral Small 1.1 or Grok-4 Heavy?

Devstral Small 1.1 (Mistral AI) and Grok-4 Heavy (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Devstral Small 1.1 compare to Grok-4 Heavy in benchmarks?

Devstral Small 1.1 scores SWE-Bench Verified: 53.6%. Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%.

What are the context window sizes for Devstral Small 1.1 and Grok-4 Heavy?

Devstral Small 1.1 supports 128K tokens and Grok-4 Heavy supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Devstral Small 1.1 and Grok-4 Heavy?

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

Who makes Devstral Small 1.1 and Grok-4 Heavy?

Devstral Small 1.1 is developed by Mistral AI and Grok-4 Heavy is developed by xAI.

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