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Claude Mythos 5.1 vs Ministral 3 (3B Instruct 2512)

Claude Mythos 5.1 leads the LLM Stats Score 44.5 to 2.2.

Anthropic · Mistral AI · Updated for 2026

Which is better?

Claude Mythos 5.1 leads the overall LLM Stats Score 44.5 to 2.2, ranking #40 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 44.5 and ranks #40 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Ministral 3 (3B Instruct 2512)

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

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
Ministral 3 (3B Instruct 2512)
Mistral AI
Core performance indexes
LLM Stats Score
44.5
#40
2.2
#322
Reasoning
43.4
#41
2.7
#311
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 Ministral 3 (3B Instruct 2512)

No common benchmarks found

Claude Mythos 5.1 and Ministral 3 (3B Instruct 2512)don'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
Ministral 3 (3B Instruct 2512)
Input- tokens
Output- tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.1 and Ministral 3 (3B Instruct 2512) 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

Ministral 3 (3B Instruct 2512)

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.1 is licensed under a proprietary license, while Ministral 3 (3B Instruct 2512) 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

Ministral 3 (3B Instruct 2512)

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while Ministral 3 (3B Instruct 2512) was released on 2025-12-04.

Claude Mythos 5.1 is 9 months newer than Ministral 3 (3B Instruct 2512).

Claude Mythos 5.1

Sep 1, 2026

3 weeks ago

9mo newer
Ministral 3 (3B Instruct 2512)

Dec 4, 2025

9 months 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 Ministral 3 (3B Instruct 2512) side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
Ministral 3 (3B Instruct 2512)
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs Ministral 3 (3B Instruct 2512).

Which is better, Claude Mythos 5.1 or Ministral 3 (3B Instruct 2512)?

Claude Mythos 5.1 leads the LLM Stats Score 44.5 to 2.2. Claude Mythos 5.1 is made by Anthropic and Ministral 3 (3B Instruct 2512) 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 Ministral 3 (3B Instruct 2512) in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. Ministral 3 (3B Instruct 2512) scores MATH: 83.0%, Wild Bench: 56.8%, Arena Hard: 30.5%, MM-MT-Bench: 7.8%.

What are the context window sizes for Claude Mythos 5.1 and Ministral 3 (3B Instruct 2512)?

Claude Mythos 5.1 supports 1.0M tokens and Ministral 3 (3B Instruct 2512) 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 Ministral 3 (3B Instruct 2512)?

Key differences include LLM Stats Score (44.5 vs 2.2), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and Ministral 3 (3B Instruct 2512)?

Claude Mythos 5.1 is developed by Anthropic and Ministral 3 (3B Instruct 2512) is developed by Mistral AI.

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