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Claude Mythos 5.1 vs Magistral Small 2506

Claude Mythos 5.1 leads the LLM Stats Score 45.3 to 10.7.

Anthropic · Mistral AI · Updated for 2026

Which is better?

Claude Mythos 5.1 leads the overall LLM Stats Score 45.3 to 10.7, ranking #33 overall.

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

Choose Claude Mythos 5.1

  • overall performance matters — it scores 45.3 and ranks #33 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Magistral Small 2506

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

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
Magistral Small 2506
Mistral AI
Core performance indexes
LLM Stats Score
45.3
#33
10.7
#264
Reasoning
44.1
#36
10.9
#262
Coding
38.0
#18
5.2
#204
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

1 reported for Claude Mythos 5.1 · 4 for Magistral Small 2506

No common benchmarks found

Claude Mythos 5.1 and Magistral Small 2506don'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 Claude Mythos 5.1 specifies input context (1,000,000 tokens). Only Claude Mythos 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Mythos 5.1
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Magistral Small 2506
Input- tokens
Output- tokens
Tue Sep 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Mythos 5.1 supports multimodal inputs, whereas Magistral Small 2506 does not.

Claude Mythos 5.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Mythos 5.1

Text
Images
Audio
Video

Magistral Small 2506

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.1 is licensed under a proprietary license, while Magistral Small 2506 uses Apache 2.0.

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

Claude Mythos 5.1

Proprietary

Closed source

Magistral Small 2506

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while Magistral Small 2506 was released on 2025-06-10.

Claude Mythos 5.1 is 15 months newer than Magistral Small 2506.

Claude Mythos 5.1

Sep 1, 2026

3 weeks ago

1.2yr newer
Magistral Small 2506

Jun 10, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Magistral Small 2506 has a documented knowledge cutoff of 2025-06-01, while Claude Mythos 5.1's cutoff date is not specified.

We can confirm Magistral Small 2506's training data extends to 2025-06-01, but cannot make a direct comparison without Claude Mythos 5.1's cutoff date.

Claude Mythos 5.1

—

Magistral Small 2506

Jun 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Mythos 5.1 and Magistral Small 2506 side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
Magistral Small 2506
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs Magistral Small 2506.

Which is better, Claude Mythos 5.1 or Magistral Small 2506?

Claude Mythos 5.1 leads the LLM Stats Score 45.3 to 10.7. Claude Mythos 5.1 is made by Anthropic and Magistral Small 2506 is made by Mistral AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.1 compare to Magistral Small 2506 in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. Magistral Small 2506 scores AIME 2024: 70.7%, GPQA: 68.2%, AIME 2025: 62.8%, LiveCodeBench: 51.3%.

What are the context window sizes for Claude Mythos 5.1 and Magistral Small 2506?

Claude Mythos 5.1 supports 1.0M tokens and Magistral Small 2506 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 Claude Mythos 5.1 and Magistral Small 2506?

Key differences include LLM Stats Score (45.3 vs 10.7), multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and Magistral Small 2506?

Claude Mythos 5.1 is developed by Anthropic and Magistral Small 2506 is developed by Mistral AI.

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