Model Comparison

o3-mini vs Magistral MediumWhich is better in 2026?

o3-mini significantly outperforms across most benchmarks.

Verdict: o3-mini vs Magistral Medium — which is better?

o3-mini (by OpenAI) and Magistral Medium (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.

o3-mini outperforms in 3 benchmarks (Aider-Polyglot, AIME 2024, GPQA), while Magistral Medium is better at 0 benchmarks. o3-mini significantly outperforms across most benchmarks.

Choose o3-mini if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks

Choose Magistral Medium if…

  • you want the most recent training data — it shipped Jun 2025
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

o3-mini outperforms in 3 benchmarks (Aider-Polyglot, AIME 2024, GPQA), while Magistral Medium is better at 0 benchmarks.

o3-mini significantly outperforms across most benchmarks.

Tue Jul 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only o3-mini specifies input context (200,000 tokens). Only o3-mini specifies output context (100,000 tokens).

OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
Mistral AI
Magistral Medium
Input- tokens
Output- tokens
Tue Jul 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Magistral Medium supports multimodal inputs, whereas o3-mini does not.

Magistral Medium can handle both text and other forms of data like images, making it suitable for multimodal applications.

o3-mini

Text
Images
Audio
Video

Magistral Medium

Text
Images
Audio
Video

License

Usage and distribution terms

o3-mini is licensed under a proprietary license, while Magistral Medium uses Apache 2.0.

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

o3-mini

Proprietary

Closed source

Magistral Medium

Apache 2.0

Open weights

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while Magistral Medium was released on 2025-06-10.

Magistral Medium is 4 months newer than o3-mini.

o3-mini

Jan 30, 2025

1.5 years ago

Magistral Medium

Jun 10, 2025

1.1 years ago

4mo newer

Knowledge Cutoff

When training data ends

o3-mini has a knowledge cutoff of 2023-09-30, while Magistral Medium has a cutoff of 2025-06-01.

Magistral Medium has more recent training data (up to 2025-06-01), making it potentially better informed about events through that date compared to o3-mini (2023-09-30).

o3-mini

Sep 2023

Magistral Medium

Jun 2025

1.8 yr newer

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (200,000 tokens)
Higher Aider-Polyglot score (66.7% vs 47.1%)
Higher AIME 2024 score (87.3% vs 73.6%)
Higher GPQA score (77.2% vs 70.8%)
Mistral AI
Supports multimodal inputs
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against o3-mini and Magistral Medium side-by-side, then vote on the output you prefer.

o3-mini
✓ Preferred
Magistral Medium
Open in Playground
AI Model Comparison Table
Feature
OpenAI
o3-mini
Mistral AI
Magistral Medium

FAQ

Common questions about o3-mini vs Magistral Medium.

Which is better, o3-mini or Magistral Medium?

o3-mini significantly outperforms across most benchmarks. o3-mini is made by OpenAI and Magistral Medium is made by Mistral AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o3-mini compare to Magistral Medium in benchmarks?

o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%. Magistral Medium scores AIME 2024: 73.6%, GPQA: 70.8%, AIME 2025: 64.9%, LiveCodeBench: 50.3%, Aider-Polyglot: 47.1%.

What are the context window sizes for o3-mini and Magistral Medium?

o3-mini supports 200K tokens and Magistral Medium 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 o3-mini and Magistral Medium?

Key differences include multimodal support (no vs yes), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes o3-mini and Magistral Medium?

o3-mini is developed by OpenAI and Magistral Medium is developed by Mistral AI.

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