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Model Comparison

Mistral Small 3 24B Base vs o3-proWhich is better in 2026?

Comparing Mistral Small 3 24B Base and o3-pro across benchmarks, pricing, and capabilities.

Verdict: Mistral Small 3 24B Base vs o3-pro — which is better?

Mistral Small 3 24B Base (by Mistral AI) and o3-pro (by OpenAI) 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 Mistral Small 3 24B Base if…

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

Choose o3-pro if…

  • you want the most recent training data — it shipped Jun 2025

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Mistral Small 3 24B Base and o3-prodon'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 o3-pro specifies input context (200,000 tokens). Only o3-pro specifies output context (100,000 tokens).

Mistral AI
Mistral Small 3 24B Base
Input- tokens
Output- tokens
OpenAI
o3-pro
Input200,000 tokens
Output100,000 tokens
Fri Aug 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Mistral Small 3 24B Base and o3-pro support multimodal inputs.

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

Mistral Small 3 24B Base

Text
Images
Audio
Video

o3-pro

Text
Images
Audio
Video

License

Usage and distribution terms

Mistral Small 3 24B Base is licensed under Apache 2.0, while o3-pro uses a proprietary license.

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

Mistral Small 3 24B Base

Apache 2.0

Open weights

o3-pro

Proprietary

Closed source

Release Timeline

When each model was launched

Mistral Small 3 24B Base was released on 2025-01-30, while o3-pro was released on 2025-06-10.

o3-pro is 4 months newer than Mistral Small 3 24B Base.

Mistral Small 3 24B Base

Jan 30, 2025

1.5 years ago

o3-pro

Jun 10, 2025

1.2 years ago

4mo newer

Knowledge Cutoff

When training data ends

Mistral Small 3 24B Base has a knowledge cutoff of 2023-10-01, while o3-pro has a cutoff of 2024-05-31.

o3-pro has more recent training data (up to 2024-05-31), making it potentially better informed about events through that date compared to Mistral Small 3 24B Base (2023-10-01).

Mistral Small 3 24B Base

Oct 2023

o3-pro

May 2024

7 mo newer

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Mistral AI
Has open weights
OpenAI
Larger context window (200,000 tokens)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Mistral Small 3 24B Base and o3-pro side-by-side, then vote on the output you prefer.

Mistral Small 3 24B Base
✓ Preferred
o3-pro
Open in Playground
AI Model Comparison Table
Feature
Mistral AI
Mistral Small 3 24B Base
OpenAI
o3-pro

FAQ

Common questions about Mistral Small 3 24B Base vs o3-pro.

Which is better, Mistral Small 3 24B Base or o3-pro?

Mistral Small 3 24B Base (Mistral AI) and o3-pro (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Mistral Small 3 24B Base compare to o3-pro in benchmarks?

Mistral Small 3 24B Base scores ARC-C: 91.3%, GSM8k: 80.7%, MMLU: 80.7%, TriviaQA: 80.3%, MBPP: 69.6%.

What are the context window sizes for Mistral Small 3 24B Base and o3-pro?

Mistral Small 3 24B Base supports an unknown number of tokens and o3-pro supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Mistral Small 3 24B Base and o3-pro?

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

Who makes Mistral Small 3 24B Base and o3-pro?

Mistral Small 3 24B Base is developed by Mistral AI and o3-pro is developed by OpenAI.

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