whichLlmmodel
Back to Dashboard

Mistral AIMistral Large 3VSOpenAIGPT-5.5

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

Our Take

We recommend GPT-5.5 if you need peak intelligence for complex complex codebases, multi-file repositories, and architectural planning, or the 15.0x cheaper Mistral Large 3 if your workflow is limited to scripting single-file apps or clearly defined functions. While GPT-5.5 holds a major reasoning advantage, Mistral Large 3 is optimized for high-volume budget pipelines. Choose GPT-5.5 for architectural codebase planning, or Mistral Large 3 to maximize your budget for basic scripts.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Evaluation: Mistral Large 3 was evaluated on LiveCodeBench (scoring 34.4%), while GPT-5.5 was evaluated on SWE-bench Pro (scoring 58.6%).
  • Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. GPT-5.5 scored 93.6%, while Mistral Large 3 scored 85.5%.
  • Cost Efficiency: Mistral Large 3 pricing ($0.5/M input, $1.5/M output) is 15.0x cheaper than GPT-5.5 ($5/M input, $30/M output).
    • Was this recommendation helpful?
    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)15.0x cheaper
    $0.75Input: $0.50 | Output: $1.50
    Context Window
    262.14k tokens
    Model Specs

    GPT-5.5

    Website

    Benchmarks & Scores

    Coding (swe-bench-pro)
    58.6%

    complex codebases, multi-file repositories, and architectural planning

    Reasoning (gpqa-diamond)Winner (+8.1%)
    93.6%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $11.25Input: $5.00 | Output: $30.00
    Context WindowLarger
    1.05M tokens
    Read our data collection methodology

    Frequently Asked Questions about Mistral Large 3 vs GPT-5.5

    Mistral Large 3 is cheaper than GPT-5.5. Mistral Large 3 has a blended cost of $0.75/1M tokens, which is about 15.0x cheaper than GPT-5.5 at $11.25/1M tokens.

    For coding tasks, Mistral Large 3 scores 34.4% on live-code-bench (scripting single-file apps or clearly defined functions), while GPT-5.5 scores 58.6% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning).

    Related Matchups

    Explore similar comparisons for Mistral Large 3 and GPT-5.5.

    Browse More Comparisons
    Mistral AIMistral Large 3
    VS
    OpenAIGPT-5.6 Sol
    Compare Specs
    OpenAIGPT-5.5
    VS
    OpenAIGPT-5.6 Terra
    Compare Specs
    Mistral AIMistral Large 3
    VS
    OpenAIGPT-5.6 Luna
    Compare Specs

    Do you want to find a model for your constraints?

    Use our interactive model finder to filter LLMs by reasoning capability, coding performance, cost, and context length.

    Open Model Finder