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Model Comparison

GPT-5 Codex vs Pixtral LargeWhich is better in 2026?

Comparing GPT-5 Codex and Pixtral Large across benchmarks, pricing, and capabilities.

Verdict: GPT-5 Codex vs Pixtral Large — which is better?

GPT-5 Codex (by OpenAI) and Pixtral Large (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 GPT-5 Codex if…

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

Choose Pixtral Large if…

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

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5 Codex and Pixtral Largedon'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 Pixtral Large specifies input context (128,000 tokens). Only Pixtral Large specifies output context (128,000 tokens).

OpenAI
GPT-5 Codex
Input- tokens
Output- tokens
Mistral AI
Pixtral Large
Input128,000 tokens
Output128,000 tokens
Fri Aug 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Pixtral Large supports multimodal inputs, whereas GPT-5 Codex does not.

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

GPT-5 Codex

Text
Images
Audio
Video

Pixtral Large

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5 Codex is licensed under a proprietary license, while Pixtral Large uses Mistral Research License (MRL) for research; Mistral Commercial License for commercial use.

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

GPT-5 Codex

Proprietary

Closed source

Pixtral Large

Mistral Research License (MRL) for research; Mistral Commercial License for commercial use

Open weights

Release Timeline

When each model was launched

GPT-5 Codex was released on 2025-09-15, while Pixtral Large was released on 2024-11-18.

GPT-5 Codex is 10 months newer than Pixtral Large.

GPT-5 Codex

Sep 15, 2025

10 months ago

10mo newer
Pixtral Large

Nov 18, 2024

1.7 years ago

Knowledge Cutoff

When training data ends

GPT-5 Codex has a documented knowledge cutoff of 2024-09-30, while Pixtral Large's cutoff date is not specified.

We can confirm GPT-5 Codex's training data extends to 2024-09-30, but cannot make a direct comparison without Pixtral Large's cutoff date.

GPT-5 Codex

Sep 2024

Pixtral Large

—

Outputs Comparison

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Key Takeaways

OpenAI

No standout differentiators in the data we have for this pair.

Mistral AI
Larger context window (128,000 tokens)
Supports multimodal inputs
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5 Codex and Pixtral Large side-by-side, then vote on the output you prefer.

GPT-5 Codex
✓ Preferred
Pixtral Large
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5 Codex
Mistral AI
Pixtral Large

FAQ

Common questions about GPT-5 Codex vs Pixtral Large.

Which is better, GPT-5 Codex or Pixtral Large?

GPT-5 Codex (OpenAI) and Pixtral Large (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 GPT-5 Codex compare to Pixtral Large in benchmarks?

GPT-5 Codex scores SWE-Bench Verified: 74.5%. Pixtral Large scores AI2D: 93.8%, DocVQA: 93.3%, ChartQA: 88.1%, VQAv2: 80.9%, MM-MT-Bench: 74.0%.

What are the context window sizes for GPT-5 Codex and Pixtral Large?

GPT-5 Codex supports an unknown number of tokens and Pixtral Large supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5 Codex and Pixtral Large?

Key differences include multimodal support (no vs yes), licensing (Proprietary vs Mistral Research License (MRL) for research; Mistral Commercial License for commercial use). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5 Codex and Pixtral Large?

GPT-5 Codex is developed by OpenAI and Pixtral Large is developed by Mistral AI.

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