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Devstral Medium vs Grok-1.5

Devstral Medium leads the LLM Stats Score 13.6 to -2.6.

Mistral AI · xAI · Updated for 2026

Which is better?

Devstral Medium leads the overall LLM Stats Score 13.6 to -2.6, ranking #242 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Devstral Medium

  • overall performance matters — it scores 13.6 and ranks #242 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Jul 2025

Choose Grok-1.5

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

Devstral Medium
Mistral AI
Grok-1.5
xAI
Core performance indexes
LLM Stats Score
13.6
#242
-2.6
#339
Reasoning
13.5
#235
-2.2
#329
Coding
5.3
#199
-0.9
#245
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.40 / M
— / M
Output price
$2.00 / M
— / M
Context window
128,000
—

Individual benchmarks

1 reported for Devstral Medium · 9 for Grok-1.5

No common benchmarks found

Devstral Medium and Grok-1.5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

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

Mistral AI
Devstral Medium
Input128,000 tokens
Output128,000 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Sun Sep 13 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Devstral Medium

Proprietary

Closed source

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Devstral Medium was released on 2025-07-10, while Grok-1.5 was released on 2024-03-28.

Devstral Medium is 16 months newer than Grok-1.5.

Devstral Medium

Jul 10, 2025

1.2 years ago

1.3yr newer
Grok-1.5

Mar 28, 2024

2.5 years ago

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→

Judge for yourself.

Run your own prompts against Devstral Medium and Grok-1.5 side-by-side, then vote on the output you prefer.

Devstral Medium
✓ Preferred
Grok-1.5
Open in Playground

FAQ

Common questions about Devstral Medium vs Grok-1.5.

Which is better, Devstral Medium or Grok-1.5?

Devstral Medium leads the LLM Stats Score 13.6 to -2.6. Devstral Medium is made by Mistral AI and Grok-1.5 is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Devstral Medium compare to Grok-1.5 in benchmarks?

Devstral Medium scores SWE-Bench Verified: 61.6%. Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%.

What are the context window sizes for Devstral Medium and Grok-1.5?

Devstral Medium supports 128K tokens and Grok-1.5 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 Medium and Grok-1.5?

Key differences include LLM Stats Score (13.6 vs -2.6). See the full comparison above for benchmark-by-benchmark results.

Who makes Devstral Medium and Grok-1.5?

Devstral Medium is developed by Mistral AI and Grok-1.5 is developed by xAI.

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