Mistral Small 4 — Free AI Model & API

mistral-ai/mistral-small-4
chat
Get API key →
Context Window 256K
Max Output 256K
Rate Limit ~1 RPS, 500K TPM
Cost $0.00 FREE
Free Period Since May 10, 2026
Credit Card Not required
Status Online

Overview

Mistral Small 4 from Mistral AI is a flexible LLM (256,000 tokens context, 1 RPS, 500K TPM) ideal for chat applications, offering openAI compatibility and accessible without credit card.

Model ID
mistral-small-4
Base URL
https://api.mistral.ai/v1
Specifications
Context: 256K · Output: 256K · Modality: text · OpenAI Compat: Yes

Quick Start

Integrate Mistral Small 4 with 3 lines of code. See the config generator for Claude Code, Cursor, and more.

from openai import OpenAI

client = OpenAI(
 base_url="https://api.mistral.ai/v1",
 api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
 model="mistral-small-4",
 messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)
import OpenAI from "openai";

const openai = new OpenAI({
 baseURL: "https://api.mistral.ai/v1",
 apiKey: "YOUR_API_KEY",
});

const completion = await openai.chat.completions.create({
 model: "mistral-small-4",
 messages: [{ role: "user", content: "Hello!" }],
});

console.log(completion.choices[0].message.content);
curl https://api.mistral.ai/v1/chat/completions \
 -H "Content-Type: application/json" \
 -H "Authorization: Bearer YOUR_API_KEY" \
 -d '{
 "model": "mistral-small-4",
 "messages": [{"role": "user", "content": "Hello!"}]
 }'

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Pixtral Large

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Rate Limits & Constraints

Rate Limit ~1 RPS, 500K TPM
Context Window 256K
Max Output Tokens 256K
Cost Free — since May 10, 2026
Credit Card Not required
OpenAI Compatible Yes — drop-in replacement

Mistral AI Platform Limitations

  • ~1 RPS is slow for concurrent or batch workloads
  • Phone verification required for signup
  • Free tier data may be used for model improvement unless opted out

Features & Use Cases

Best For

Chat

Modality Support

text

Mistral AI Highlights

  • Access to Mistral Small, Medium, Large
  • ~1B tokens/month free
  • Codestral (code model) included
  • No credit card required (phone verification)

Playground — Test Mistral Small 4

Test Mistral Small 4 directly in your browser. Your API key is sent directly to Mistral AI — never stored.

Model: Mistral Small 4 Get Key

🔒 Your key is never stored — sent directly to the model provider via our server proxy.

Ready to chat with Mistral Small 4.

Frequently Asked Questions

How do I get an API key for Mistral Small 4?

Sign up at Mistral AI to get your API key. No credit card is required — just an email sign-up. Once you have the key, use the code snippets in the Quick Start section above.

Is Mistral Small 4 really free?

Yes. Mistral Small 4 is available on Mistral AI's free tier and has been free since May 10, 2026. Rate limits apply: ~1 RPS, 500K TPM. Always check the provider's terms for any changes to the free tier.

What are Mistral Small 4's rate limits?

~1 RPS, 500K TPM Context window: 256K. Max output: 256K. No credit card required.

What are the best free alternatives to Mistral Small 4?

Popular free alternatives include inclusionAI: Ring-2.6-1T, Baidu Qianfan: CoBuddy (free), Owl Alpha. You can also browse all 147+ free models on our site.

More questions? See our full FAQ →

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