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Claude Mythos 5.1 vs Mistral Small 3.1 24B Instruct

Claude Mythos 5.1 leads the LLM Stats Score 45.1 to 4.2.

Anthropic · Mistral AI · Updated for 2026

Which is better?

Claude Mythos 5.1 leads the overall LLM Stats Score 45.1 to 4.2, 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 45.1 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 Mistral Small 3.1 24B Instruct

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

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
Mistral Small 3.1 24B Instruct
Mistral AI
Core performance indexes
LLM Stats Score
45.1
#33
4.2
#302
Reasoning
44.2
#36
4.2
#296
Coding
37.9
#17
9.7
#170
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 · 9 for Mistral Small 3.1 24B Instruct

No common benchmarks found

Claude Mythos 5.1 and Mistral Small 3.1 24B Instructdon'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
Mistral Small 3.1 24B Instruct
Input- tokens
Output- tokens
Mon Sep 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.1 and Mistral Small 3.1 24B Instruct support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Mythos 5.1

Text
Images
Audio
Video

Mistral Small 3.1 24B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.1 is licensed under a proprietary license, while Mistral Small 3.1 24B Instruct 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

Mistral Small 3.1 24B Instruct

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while Mistral Small 3.1 24B Instruct was released on 2025-03-17.

Claude Mythos 5.1 is 18 months newer than Mistral Small 3.1 24B Instruct.

Claude Mythos 5.1

Sep 1, 2026

2 weeks ago

1.5yr newer
Mistral Small 3.1 24B Instruct

Mar 17, 2025

1.5 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 Claude Mythos 5.1 and Mistral Small 3.1 24B Instruct side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
Mistral Small 3.1 24B Instruct
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs Mistral Small 3.1 24B Instruct.

Which is better, Claude Mythos 5.1 or Mistral Small 3.1 24B Instruct?

Claude Mythos 5.1 leads the LLM Stats Score 45.1 to 4.2. Claude Mythos 5.1 is made by Anthropic and Mistral Small 3.1 24B Instruct 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 Mistral Small 3.1 24B Instruct in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. Mistral Small 3.1 24B Instruct scores HumanEval: 88.4%, MMLU: 80.6%, TriviaQA: 80.5%, MBPP: 74.7%, MATH: 69.3%.

What are the context window sizes for Claude Mythos 5.1 and Mistral Small 3.1 24B Instruct?

Claude Mythos 5.1 supports 1.0M tokens and Mistral Small 3.1 24B Instruct 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 Mistral Small 3.1 24B Instruct?

Key differences include LLM Stats Score (45.1 vs 4.2), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and Mistral Small 3.1 24B Instruct?

Claude Mythos 5.1 is developed by Anthropic and Mistral Small 3.1 24B Instruct is developed by Mistral AI.

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