What is the difference between GPT-5 Pro and Mistral Small 4?

GPT-5 Pro is developed by OpenAI while Mistral Small 4 is developed by Mistral AI. GPT-5 Pro has a 400K token context window vs Mistral Small 4's 262K. You can compare their actual outputs across 41 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 Pro or Mistral Small 4?

It depends on your use case. GPT-5 Pro and Mistral Small 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 41 challenges so you can judge which fits your needs best.

How much does GPT-5 Pro cost compared to Mistral Small 4?

GPT-5 Pro costs $15/M input tokens and Mistral Small 4 costs $0.15/M input tokens. Mistral Small 4 is $14.85/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-5 Pro and Mistral Small 4 on Rival?

This page shows a side-by-side comparison of GPT-5 Pro and Mistral Small 4 across shared challenges. You can vote on which model produced the better output, and Pro users can create custom challenges to test both models with their own prompts.

Rival

Updated Mar 16, 2026

GPT-5 ProvsMistral Small 4

36 fights queued

Why GPT-5 Pro?

1.5x more context400K

Why Mistral Small 4?

185.7x cheaper overall$0.15/M in · $0.60/M out

5 months newerMar 2026

Favorites

GPT-5 ProMistral Small 4

Movie

—

The Dark Knight

20088.5

Album

—

OK Computer

Radiohead

Book

—

Братья Карамазовы

Фёдор Михайлович Достоевский

City

—

Kyoto

Japan

Game

—

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

6 / 36

Estimate Complexityreasoning

Tests an AI's ability to make educated estimates based on technical knowledge

GPT-5 Pro

Openai · Oct 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Small 4

Mistral · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

2 / 36

AI Board Game Logicreasoning

Tests an AI's ability to understand game rules and strategy

GPT-5 Pro

Openai · Oct 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Small 4

Mistral · Mar 2026svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

3 / 36

Logic Puzzlereasoning

Tests an AI's ability to solve a simple but potentially confusing logic puzzle

GPT-5 Pro

Openai · Oct 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Small 4

Mistral · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

4 / 36

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

GPT-5 Pro

Openai · Oct 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Small 4

Mistral · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

5 / 36

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

GPT-5 Pro

Openai · Oct 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Small 4

Mistral · Mar 2026svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

6 / 36

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

GPT-5 Pro

Openai · Oct 2025text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Mistral Small 4

Mistral · Mar 2026text

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

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Our Verdict

GPT-5 Pro

Mistral Small 4Runner-up

No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, bigger context window, major provider backing.

Mistral Small 4 is 200x cheaper per token — worth considering if cost matters.

Too close to call

These are our prompts. Yours will tell you more.

Run GPT-5 Pro vs Mistral Small 4 on your actual task. 5 free credits. No card.

Test with your prompt

FAQ

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GPT-5 Pro vs Mistral Small 4

Which is better, GPT-5 Pro or Mistral Small 4?