Mistral Medium 3.1
Mistral AIReleased Aug 13, 2025
Mistral Medium 3.1 is an updated version of Mistral Medium 3, which is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances...
- Context window
- 131K tokens
- Input
- text, image, file
- Output
- text
- Tokenizer
- Mistral
- Knowledge cutoff
- Jun 30, 2025
- Released
- Aug 13, 2025
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $0.400 | $0.012 | $0.412 |
| Output | $2.00 | $0.060 | $2.06 |
| Cache read | $0.040 | $0.0012 | $0.041 |
Benchmarks
Artificial Analysis
- Intelligence index
- 14.7
- Coding index
- 20.5
- Agentic index
- 6.2
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| 3Dmodels | 1159 | 44.7% | #58 |
| ASCII artmodels | 1044 | 30.8% | #47 |
| Codemodels | 1170 | 45.1% | #61 |
| Data vizmodels | 1191 | 47.6% | #52 |
| Game devmodels | 1139 | 40.7% | #69 |
| SVGmodels | 1050 | 38.2% | #63 |
| UI componentsmodels | 1154 | 43.5% | #61 |
| Websitesmodels | 1176 | 46% | #61 |
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-3.1.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "mistralai/mistral-medium-3.1",
"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-3.1",
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-3.1",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does Mistral Medium 3.1 cost via API?
- Through OpenKey, Mistral Medium 3.1 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 3.1's context window?
- Mistral Medium 3.1 accepts up to 131K tokens of context.
- Is Mistral Medium 3.1 OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "mistralai/mistral-medium-3.1" using any OpenAI SDK — only the base URL and API key change.
- What inputs does Mistral Medium 3.1 support?
- Mistral Medium 3.1 accepts text, image, file input and produces text output. Its knowledge cutoff is Jun 30, 2025.
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