Model Comparison

Claude Opus 5 vs Mistral Large 3 (675B Base)Which is better in 2026?

Comparing Claude Opus 5 and Mistral Large 3 (675B Base) across benchmarks, pricing, and capabilities.

Verdict: Claude Opus 5 vs Mistral Large 3 (675B Base) — which is better?

Claude Opus 5 (by Anthropic) and Mistral Large 3 (675B Base) (by Mistral AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Choose Claude Opus 5 if…

  • you want the most recent training data — it shipped Jul 2026

Choose Mistral Large 3 (675B Base) if…

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

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude Opus 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.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Claude Opus 5 specifies input context (1,000,000 tokens). Only Claude Opus 5 specifies output context (128,000 tokens).

Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
Mistral AI
Mistral Large 3 (675B Base)
Input- tokens
Output- tokens
Mon Jul 27 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 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 Opus 5

Text
Images
Audio
Video

Mistral Large 3 (675B Base)

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 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 Opus 5

Proprietary

Closed source

Mistral Large 3 (675B Base)

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 5 was released on 2026-07-24, while Mistral Large 3 (675B Base) was released on 2025-12-04.

Claude Opus 5 is 8 months newer than Mistral Large 3 (675B Base).

Claude Opus 5

Jul 24, 2026

3 days ago

7mo newer
Mistral Large 3 (675B Base)

Dec 4, 2025

7 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→

Key Takeaways

Anthropic
Larger context window (1,000,000 tokens)
Mistral AI
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Opus 5 and Mistral Large 3 (675B Base) side-by-side, then vote on the output you prefer.

Claude Opus 5
✓ Preferred
Mistral Large 3 (675B Base)
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Opus 5
Mistral AI
Mistral Large 3 (675B Base)

FAQ

Common questions about Claude Opus 5 vs Mistral Large 3 (675B Base).

Which is better, Claude Opus 5 or Mistral Large 3 (675B Base)?

Claude Opus 5 (Anthropic) and Mistral Large 3 (675B Base) (Mistral AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Claude Opus 5 compare to Mistral Large 3 (675B Base) in benchmarks?

Claude Opus 5 scores BrowseComp: 90.8%, BioMysteryBench: 90.1%, OSWorld 2.0: 70.6%, DeepSWE 1.1: 68.8%, Humanity's Last Exam: 64.7%. 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 Opus 5 and Mistral Large 3 (675B Base)?

Claude Opus 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 Opus 5 and Mistral Large 3 (675B Base)?

Key differences include licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5 and Mistral Large 3 (675B Base)?

Claude Opus 5 is developed by Anthropic and Mistral Large 3 (675B Base) is developed by Mistral AI.

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