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AnthropicClaude Opus 5VSMistral AIMistral Large 3

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

We recommend Claude Opus 5 if you need peak intelligence for complex complex codebases, multi-file repositories, and architectural planning, or the 13.3x cheaper Mistral Large 3 if your workflow is limited to scripting single-file apps or clearly defined functions. While Claude Opus 5 holds a major reasoning advantage, Mistral Large 3 is optimized for high-volume budget pipelines. Choose Claude Opus 5 for architectural codebase planning, or Mistral Large 3 to maximize your budget for basic scripts.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Evaluation: Claude Opus 5 was evaluated on SWE-bench Pro (scoring 79.2%), while Mistral Large 3 was evaluated on LiveCodeBench (scoring 34.4%).
  • Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. Claude Opus 5 scored 93.7%, while Mistral Large 3 scored 85.5%.
  • Cost Efficiency: Mistral Large 3 pricing ($0.5/M input, $1.5/M output) is 13.3x cheaper than Claude Opus 5 ($5/M input, $25/M output).
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    Model Specs

    Claude Opus 5

    Website

    Benchmarks & Scores

    Coding (swe-bench-pro)
    79.2%

    complex codebases, multi-file repositories, and architectural planning

    Reasoning (gpqa-diamond)Winner (+8.2%)
    93.7%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $10.00Input: $5.00 | Output: $25.00
    Context WindowLarger
    1.05M tokens
    Model Specs

    Mistral Large 3

    Open SourceAPI Available
    Website🤗HF

    Benchmarks & Scores

    Coding (live-code-bench)
    34.4%

    scripting single-file apps or clearly defined functions

    Reasoning (gpqa-diamond)
    85.5%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)13.3x cheaper
    $0.75Input: $0.50 | Output: $1.50
    Context Window
    262.14k tokens
    Read our data collection methodology

    Frequently Asked Questions about Claude Opus 5 vs Mistral Large 3

    Mistral Large 3 is cheaper than Claude Opus 5. Mistral Large 3 has a blended cost of $0.75/1M tokens, which is about 13.3x cheaper than Claude Opus 5 at $10.00/1M tokens.

    For coding tasks, Claude Opus 5 scores 79.2% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning), while Mistral Large 3 scores 34.4% on live-code-bench (scripting single-file apps or clearly defined functions).

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