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© 2026 Rival · Built at hours no one should be awake, on hardware we don't own
Mistral Devstral Small 1.1 vs GPT-5: Which Is Better? [2026 Comparison]
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  3. Mistral Devstral Small 1.1 vs GPT-5
Updated Aug 7, 2025

Mistral Devstral Small 1.1 vs GPT-5

Compare Mistral Devstral Small 1.1 by Mistral AI against GPT-5 by OpenAI, tested across 47 shared challenges. Updated April 2026.

Which is better, Mistral Devstral Small 1.1 or GPT-5?

Mistral Devstral Small 1.1 and GPT-5 are both competitive models. Mistral Devstral Small 1.1 costs $0.1/M input tokens vs $1.25/M for GPT-5. Compare their real outputs side by side below.

Key Differences Between Mistral Devstral Small 1.1 and GPT-5

Mistral Devstral Small 1.1 is made by mistral while GPT-5 is from openai. On pricing, Mistral Devstral Small 1.1 costs $0.1/M input tokens vs $1.25/M for GPT-5.

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Mistral Devstral Small 1.1vsGPT-5

47 fights queued

Mistral Devstral Small 1.1 logo

Why Mistral Devstral Small 1.1?

29.5x cheaper overall$0.10/M in · $0.30/M out
GPT-5 logo

Why GPT-5?

Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified74.9% vs 46.8%
Mistral Devstral Small 1.1GPT-5
Input price
$0.10/M
$1.25/M
Output price
$0.30/M
$10.00/M
Context
—
400K
Released
Jul 2025
Aug 2025
Benchmarks1 common
SWE-bench Verified
46.8%
74.9%+37.5%

Favorites

Mistral Devstral Small 1.1GPT-5
Movie
The Shawshank Redemption

The Shawshank Redemption

19948.7
—
Album
Dark Side Of The Moon

Dark Side Of The Moon

suisside
—
Book
To Kill a Mockingbird

To Kill a Mockingbird

Harper Lee
—
City
Kyoto

Kyoto

Japan
—
Game
The Legend of Zelda: Breath of the Wild

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
—
12 / 47
01

Estimate Complexityreasoning

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

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
2 / 47
02

AI Board Game Logicreasoning

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

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
3 / 47
03

Logic Puzzlereasoning

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

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
4 / 47
04

Math Misconception Testreasoning

Tests an AI's understanding of number representation

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
5 / 47
05

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
6 / 47
06

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
Sponsored
7 / 47
07

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025svg
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
8 / 47
08

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
9 / 47
09

Realistic AI Interviewconversation

Tests an AI's ability to simulate personalities and predict future trends

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
10 / 47
10

Satirical Fake News Headlineconversation

Tests an AI's humor and understanding of current events

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
11 / 47
11

Character Voice Testconversation

Tests an AI's ability to write in distinct character voices

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025text
Nothing here. The model returned empty. We stared at it for a while.
Try this prompt
Vote
12 / 47
12

Minimalist Landing Pageweb design

Tests an AI's ability to generate a complete, working landing page

Mistral Devstral Small 1.1

Mistral Devstral Small 1.1

Mistral · Jul 2025website
Try this prompt
GPT-5

GPT-5

Openai · Aug 2025website
Try this prompt
Vote

This matchup has more rounds

35+ more head-to-head results. Free. Not a trick.

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Our Verdict
GPT-5
GPT-5
Mistral Devstral Small 1.1
Mistral Devstral Small 1.1Runner-up

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

Mistral Devstral Small 1.1 is 33x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
98%

Mistral Devstral Small 1.1 uses 22.8x more bold

Mistral Devstral Small 1.1
GPT-5
50%Vocabulary65%
17wSentence Length13w
0.56Hedging0.20
4.3Bold0.2
5.7Lists4.6
0.00Emoji0.00
0.05Headings0.16
0.34Transitions0.03
Based on 21 + 16 text responses
vs

Ask them anything yourself

Mistral Devstral Small 1.1GPT-5

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
Read the full reportor download the 14-slide PDF

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
Download the free previewor get all 58 slides for $49
FAQ

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© 2026 Rival · Built at hours no one should be awake, on hardware we don't own
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