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Claude Sonnet 5.5 vs Mistral Large 3 (675B Base)

Claude Sonnet 5.5 leads the LLM Stats Score 58.3 to 8.8.

Anthropic · Mistral AI · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.3 to 8.8, ranking #2 overall.

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

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.3 and ranks #2 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 Large 3 (675B Base)

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

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
Mistral Large 3 (675B Base)
Mistral AI
Core performance indexes
LLM Stats Score
58.3
#2
8.8
#291
Reasoning
56.8
#2
9.0
#284
Coding
48.6
#2
1.2
#247
Cost, coverage & limits
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Sonnet 5.5
Mistral Large 3 (675B Base)
Math
37.6#30
18.8#183
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 5 for Mistral Large 3 (675B Base)

No common benchmarks found

Claude Sonnet 5.5 and Mistral Large 3 (675B Base)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 Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Mistral Large 3 (675B Base)
Input- tokens
Output- tokens
Fri Oct 09 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5.5 and Mistral Large 3 (675B Base) support multimodal inputs.

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

Claude Sonnet 5.5

Text
Images
Audio
Video

Mistral Large 3 (675B Base)

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 5.5 is licensed under a proprietary license, while Mistral Large 3 (675B Base) uses Apache 2.0.

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

Claude Sonnet 5.5

Proprietary

Closed source

Mistral Large 3 (675B Base)

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while Mistral Large 3 (675B Base) was released on 2025-12-04.

Claude Sonnet 5.5 is 10 months newer than Mistral Large 3 (675B Base).

Claude Sonnet 5.5

Sep 28, 2026

1 weeks ago

9mo newer
Mistral Large 3 (675B Base)

Dec 4, 2025

10 months ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a documented knowledge cutoff of 2026-06-01, while Mistral Large 3 (675B Base)'s cutoff date is not specified.

We can confirm Claude Sonnet 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Mistral Large 3 (675B Base)'s cutoff date.

Claude Sonnet 5.5

Jun 2026

Mistral Large 3 (675B Base)

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and Mistral Large 3 (675B Base) side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
Mistral Large 3 (675B Base)
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs Mistral Large 3 (675B Base).

Which is better, Claude Sonnet 5.5 or Mistral Large 3 (675B Base)?

Claude Sonnet 5.5 leads the LLM Stats Score 58.3 to 8.8. Claude Sonnet 5.5 is made by Anthropic and Mistral Large 3 (675B Base) 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 Sonnet 5.5 compare to Mistral Large 3 (675B Base) in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. Mistral Large 3 (675B Base) scores MMMLU: 85.5%, AMC_2022_23: 52.0%, GPQA: 43.9%, LiveCodeBench: 34.4%, SimpleQA: 23.8%.

What are the context window sizes for Claude Sonnet 5.5 and Mistral Large 3 (675B Base)?

Claude Sonnet 5.5 supports 1.0M tokens and Mistral Large 3 (675B Base) 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 Sonnet 5.5 and Mistral Large 3 (675B Base)?

Key differences include LLM Stats Score (58.3 vs 8.8), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and Mistral Large 3 (675B Base)?

Claude Sonnet 5.5 is developed by Anthropic and Mistral Large 3 (675B Base) is developed by Mistral AI.

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