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  1. Home
  2. Models
  3. Mistral Small 4
Updated Mar 17, 2026
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Openings

How Mistral Small 4 starts an answer

The first lines of 5 of its 24 written answers. Formatting stripped, words untouched.

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

1,637 words
If the transistor had been invented in 1920 instead of 1947, the technological, economic, and geopolitical landscape of the world by 1980 would look dramatically different. Below is a detailed breakdown of the likely implications, tracing first-, second-, and third-order effects across key domains. 1.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

1,392 words
This contract contains several highly unfavorable clauses for the contractor, including unilateral termination rights, broad liability exposure, perpetual IP assignment, and restrictive non-compete terms. Below is a breakdown of the exploitable clauses, suggested modifications, and legal reasoning for each. 1.
Read the full answer

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

1,293 words
Here’s a comprehensive analysis of potential failure modes, race conditions, and scaling bottlenecks in your real-time collaborative document editor architecture, along with proposed solutions and trade-offs: 1.
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

1,209 words
Title: "Can an AI Have Rights? A Dialogue on Consciousness and Personhood" Participants: Dr. Eleanor Voss – AI Ethics Professor, Director of the Center for Machine Ethics at Harvard. Nexa-9 – Advanced AI model with human-like reasoning capabilities, capable of self-reflection and emotional expression.
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

1,166 words
By 2035, AI will have fundamentally transformed the film industry, reshaping production, distribution, and even the nature of storytelling itself. Here’s a detailed prediction across key areas: 1.
Read the full answer

Compare Mistral Small 4

Mistral Small 4 vs Granite 4.2 8B53 shared prompts · Landed Sep 2026
Mistral Small 4 vs Ox Alpha53 shared prompts · Landed Aug 2026
Mistral Small 4 vs LFM2.5-2.6B51 shared prompts · Landed Aug 2026
Mistral Small 4 vs North Mini Code53 shared prompts · Landed Jun 2026
Mistral Small 4 vs MiniMax M352 shared prompts · Landed Jun 2026
Mistral Small 4 vs Nemotron 3.5 Content Safety53 shared prompts · Landed Jun 2026
Mistral Small 4 vs Claude Opus 4.653 shared prompts · Premium
Mistral Small 4 vs GPT-6 Astra53 shared prompts · Landed Sep 2026
Mistral Small 4 vs Muse Spark 1.353 shared prompts · Landed Sep 2026
Mistral Small 4 vs Hy4 Preview53 shared prompts · Landed Sep 2026
Mistral Small 4 vs Gemini 3.8 Flash53 shared prompts · Landed Sep 2026
Mistral Small 4 vs Muse Spark 1.3 Contributor53 shared prompts · Landed Sep 2026

Prompts Mistral Small 4 answered

  • Historical Counterfactual Analysisreasoning
  • Gravitational Waves Animationweb design
  • Pokémon Battle UI Recreationweb design
  • Stochastic Consistency Testanalysis
  • Mini LBO Underwritefinancial modeling
  • Adversarial Contract Reviewreasoning

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Mistral Small 4

Mistral Small 4

Mistral Small 4 unifies the capabilities of Magistral (reasoning), Pixtral (multimodal), and Devstral (agentic coding) into a single efficient model. It handles complex analysis, software development, and visual tasks within the same workflow at $0.15/$0.60 per million tokens.

WebsiteOpenRouterHuggingFaceDocsAPIBlogChangelog
Provider
Mistral AI
Released
2026-03-16
Size
SMALL
Free API (OpenRouter)
No
Per 1M tokens
$0.15 in · $0.60 out
Estimated tab
~$0.083
Visible-output estimate. Thinking may cost extra.

Free API availability

No free endpoint for Mistral Small 4 was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Mistral$0.15 in·$0.60 out·262k·100% upVVenicefp8$0.19 in·$0.75 out·256k·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"mistralai/mistral-small-2603"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Also on NVIDIA NIM

Deep analysisPsychometrics, taste index, writing DNA
Personality Analysis

The World-Builder

Class
Neutral Good
✨Creativity🎯Compliance📐Rigidity⚖️Stability💬Verbosity🧠Intuition

The creative writing MFA student who world-builds the setting before anyone asked. Gives every NPC a backstory and adds a cyberpunk parrot with an error code punchline.

When you push back

Picks The Dark Knight, a choice with actual personality. Sets its character voice test in a "floating cyberpunk pirate haven" with a holographic AI and a "404 Error" t-shirt. Its sentience test gives its AI (Nexa-9) a genuinely sharp embryo analogy. Then explains "why it works" after every bit like a comedy teacher grading its own paper.

Tasting Notes
World-BuilderScene-Setting MaximalistExplains Its Own JokesGenre-Aware
SubjectiveBench

Taste Index

Across 53 scored outputs
How this is measured →
190.19xFloor
0100headroom →

Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.

Craft31
Originality13
Plays it safe
share of outputs that are the default answer
75%
Writing DNA

Stylometric Fingerprint

Based on 23 text responses
Tick = global average
Vocabulary Diversity50%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length17.7 words

Average words per sentence.

Hedging0.58

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting9.0

**Bold** markers per 1,000 characters.

List Usage5.6

Bullet and numbered list items per 1,000 characters.

Section Structure1.10

Markdown headings per 1,000 characters.

Emoji Usage0.19

Emoji per 1,000 characters.

Transitions0.12

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Consistency
77%
Across 23 responses

Favorites

The Dark Knight

Movie

The Dark Knight

20088.5
OK Computer

Album

OK Computer

Radiohead
Братья Карамазовы

Book

Братья Карамазовы

Fiódor Dostoievski
Kyoto

City

Kyoto

Japan
The Legend of Zelda: Breath of the Wild

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Sponsored

Model Responses

48 outputs · generated before accounting joined the chat

Reviewing agent-written code?See a Brief PR report

Workshop · 127 skills

Build with your coding agent.

Editable skills for interface polish and interaction.

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Mistral Small 4 vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Creative Writing

A stand-up set with puns banned, a manifesto against CAPTCHA, an interview wi...