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Claude Opus 5.5 vs Ministral 3 (3B Instruct 2512)

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 2.2.

Anthropic · Mistral AI · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 59.7 to 2.2, ranking #1 overall.

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

Choose Claude Opus 5.5

  • overall performance matters — it scores 59.7 and ranks #1 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 Opus 5.5
Anthropic
Ministral 3 (3B Instruct 2512)
Mistral AI
Core performance indexes
LLM Stats Score
59.7
#1
2.2
#322
Reasoning
57.8
#1
2.7
#311
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
— / M
Output price
$20.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

31 reported for Claude Opus 5.5 · 4 for Ministral 3 (3B Instruct 2512)

No common benchmarks found

Claude Opus 5.5 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 Opus 5.5 specifies input context (1,000,000 tokens). Only Claude Opus 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Opus 5.5
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 Opus 5.5 and Ministral 3 (3B Instruct 2512) support multimodal inputs.

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

Claude Opus 5.5

Text
Images
Audio
Video

Ministral 3 (3B Instruct 2512)

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 5.5 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 Opus 5.5

Proprietary

Closed source

Ministral 3 (3B Instruct 2512)

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Ministral 3 (3B Instruct 2512) was released on 2025-12-04.

Claude Opus 5.5 is 10 months newer than Ministral 3 (3B Instruct 2512).

Claude Opus 5.5

Sep 22, 2026

0 days ago

9mo newer
Ministral 3 (3B Instruct 2512)

Dec 4, 2025

9 months ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while Ministral 3 (3B Instruct 2512)'s cutoff date is not specified.

We can confirm Claude Opus 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Ministral 3 (3B Instruct 2512)'s cutoff date.

Claude Opus 5.5

Jun 2026

Ministral 3 (3B Instruct 2512)

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and Ministral 3 (3B Instruct 2512) side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
Ministral 3 (3B Instruct 2512)
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Ministral 3 (3B Instruct 2512).

Which is better, Claude Opus 5.5 or Ministral 3 (3B Instruct 2512)?

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 2.2. Claude Opus 5.5 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 Opus 5.5 compare to Ministral 3 (3B Instruct 2512) in benchmarks?

Claude Opus 5.5 scores BenchCAD (with Python tool): 96.2%, Global-MMLU: 94.3%, SWE-bench Multilingual: 93.9%, MILU: 93.1%, ArXivMath: 91.2%. 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 Opus 5.5 and Ministral 3 (3B Instruct 2512)?

Claude Opus 5.5 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 Opus 5.5 and Ministral 3 (3B Instruct 2512)?

Key differences include LLM Stats Score (59.7 vs 2.2), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and Ministral 3 (3B Instruct 2512)?

Claude Opus 5.5 is developed by Anthropic and Ministral 3 (3B Instruct 2512) is developed by Mistral AI.

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