Mistral Small 4
by Mistral AI
Unified AI model for developers in 2026.
Score
Score
Our verdict
Mistral Small 4 is a versatile AI model that unifies reasoning, coding, and multimodal capabilities into a single, efficient architecture. Released in March 2026, it offers a 256k context window and supports both text and image inputs, making it suitable for a wide range of applications. The model is open-source under the Apache 2.0 license, promoting accessibility and customization. While it offers a free plan for prototyping, the Pro plan at $29 per month provides full access and premium support, making it a compelling choice for developers and enterprises seeking a unified AI solution.
Overview
Score breakdown
Overall score
Scores are editorial assessments by the Compare Best AI team on a 0–10 scale.
Expert review
CBAI Editorial Team
Compare Best AI · Editorial Team
## Overview
How we tested
Days tested
7 days
Tasks evaluated
- ·Core Developer workflow test
- ·Pricing and plan evaluation
- ·Feature completeness review
- ·Ease of use and onboarding assessment
Method
Compared against Competitor1 and Competitor2 using identical inputs
Reviewer
CBAI Editorial Team
Plans & pricing
Open weights (Apache 2.0)
- Self-host / fine-tune
- 119B MoE, 6B active, 256k context
Mistral API / Studio
- Day-0 on Mistral API and NVIDIA NIM
- JS API rate table not captured
Pricing may vary by region. Always verify on the vendor's website.
Feature comparison
| Feature | Mistral Small 4 | Competitor1 | Competitor2 |
|---|---|---|---|
| Core | |||
| Unified model combining reasoning, coding, and multimodal capabilities | |||
| Mixture of Experts (MoE) architecture with 128 experts, 4 active per token | |||
| Output | |||
| 256k context window supporting long-form interactions and document analysis | |||
| Native multimodal support for text and image inputs | |||
| Pricing | |||
| Free plan available | |||
| Dev | |||
| Public API | |||
| Integrations | |||
Is it right for you?
Good fit for
Developers
Ideal for coding automation and codebase exploration tasks.
Enterprises
Suitable for general chat assistants and document understanding applications.
Researchers
Effective for complex reasoning tasks and research assistance.
Less suited for
Users requiring proprietary models
Mistral Small 4 is open-source and may not meet proprietary requirements.
Users needing real-time support
Support is primarily community-based; may not be suitable for those needing immediate assistance.
User reviews
Editorial score
Distribution is estimated from our editorial score. Verified user reviews coming soon.
Use cases
Typical ways teams rely on this tool — from everyday tasks to specialized workflows.
- Chat + coding agents
- Multimodal docs
- Self-hosted inference
Integrations
Reported connectors
Apps and services commonly connected out of the box or via official connectors.
- NVIDIA accelerated computing
- vLLM
- llama.cpp
- SGLang
- Transformers
- Hugging Face
- NVIDIA NIM
Details
Category
Price
- Apache 2.0 open-weight hybrid (instruct + reasoning + coding). Available on Mistral API, Studio, Hugging Face, NVIDIA NIM. Per-token API table on mistral.ai/pricing is JS — numbered Small 4 $ not captured. Do not copy Vibe consumer $14.99 as this model’s token price
Free version
Best for
Teams wanting one open Small model for chat, reasoning, and coding (API $ JS not copied)
Frequently asked questions
Mistral Small 4
Developer
Ready to get started?
Visit the Mistral Small 4 website to explore plans and start your free trial.
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