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OpenKey

Mistral Medium 3

Mistral AIReleased May 7, 2025

Mistral Medium 3 is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances state-of-the-art reasoning and multimodal performance with 8× lower cost...

Try in playground
Context window
131K tokens
Input
text, image, file
Output
text
Tokenizer
Mistral
Knowledge cutoff
Mar 31, 2025
Released
May 7, 2025

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.400$0.012$0.412
Output$2.00$0.060$2.06
Cache read$0.040$0.0012$0.041

Benchmarks

Design Arena

CategoryEloWin rateRank
3Dmodels116054.6%#56
Codemodels111848.1%#77
Data vizmodels107645.7%#81
Game devmodels108445.3%#81
UI componentsmodels108350%#76
Websitesmodels112247.7%#80

Head-to-head preference voting. How we filter and rank

Supported parameters

  • frequency_penalty
  • max_tokens
  • presence_penalty
  • response_format
  • seed
  • stop
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model mistralai/mistral-medium-3.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "mistralai/mistral-medium-3",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="mistralai/mistral-medium-3",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "mistralai/mistral-medium-3",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does Mistral Medium 3 cost via API?
Through OpenKey, Mistral Medium 3 costs $0.412 per 1M input tokens and $2.06 per 1M output tokens. That is the provider price ($0.400 / $2.00) plus a flat 3% fee — nothing else.
What is Mistral Medium 3's context window?
Mistral Medium 3 accepts up to 131K tokens of context.
Is Mistral Medium 3 OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "mistralai/mistral-medium-3" using any OpenAI SDK — only the base URL and API key change.
What inputs does Mistral Medium 3 support?
Mistral Medium 3 accepts text, image, file input and produces text output. Its knowledge cutoff is Mar 31, 2025.

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