MistralText / ChatMistral Medium 3 API: Mistral AI's chat / LLM model, one key away
Mistral Medium 3 via the ApexApi gateway
The previous Medium generation, at a quarter of Medium 3.5's output price. Often the better value of the two. Call it through ApexApi's unified, OpenAI-compatible API with one `ak-` key, alongside every other model in the catalog. It supports a 131,072-token context window, tool / function calling, image (vision) input, and streaming responses. Pricing is $0.48 input and $2.40 output per 1M tokens, billed pay-per-use from your credit balance with no subscription.
Mistral Medium 3 is served through ApexApi's unified, OpenAI-compatible API. One key, one format, with smart routing and automatic failover. Provider: Mistral AI.
Why Mistral Medium 3
131,072-token context
Reason over long documents, codebases, and multi-turn history in a single request.
Tool & function calling
Structured outputs and tool orchestration for agentic and automation workloads.
Vision input
Send images alongside text for document, UI, and visual-understanding tasks.
Specifications
- Modality
- chat
- Context window
- 131.1K tokens
- Max output
- —
- Streaming
- Yes
- Tool / function calling
- Yes
- Vision input
- Yes
Mistral Medium 3: measured reliability
From real calls ApexApi made to Mistral Medium 3 during health sweeps over the last 30 days. Our own measurements, not vendor claims.
- Success rate
- 100%
- Avg latency
- 2.8s
- Calls measured
- 1
- Last checked
- Aug 30
See how Mistral Medium 3 compares against every model we serve on the model rankings.
Mistral Medium 3 pricing
- A million tokens in and a million out costs $2.88 here, all-in.
- That makes it the 33rd cheapest of the 81 chat models we serve, ranked on output price.
- It runs 3.8× cheaper than Mistral Medium 3.5, the pricier option from the same maker.
Getting started with Mistral Medium 3
OpenAI-compatible. Point your client at ApexApi, swap your key, and call it. No new SDK to learn.
from openai import OpenAI
client = OpenAI(
base_url="https://api.apexapi.dev/v1",
api_key="<YOUR_APEXAPI_KEY>",
)
response = client.chat.completions.create(
model="mistralai/mistral-medium-3",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)Mistral Medium 3 use cases
What teams build with Mistral Medium 3 on ApexApi.
Agents & automation
Tool-using agents that orchestrate multi-step workflows and call APIs.
Coding assistants
Code generation, refactoring, reviews, and multi-file reasoning.
RAG & knowledge apps
Summarization and long-document Q&A grounded in your own data.
Mistral Medium 3 vs other models
How it compares, and on ApexApi you can switch between any of them with a single string change, same key, same endpoint.
Mistral Medium 3 vs Claude Opus 4.7
Compare Mistral Medium 3 against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Claude Opus 4.7 API →Mistral Medium 3 vs GPT-5.5
Compare Mistral Medium 3 against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about GPT-5.5 API →Mistral Medium 3 vs Gemini 3.1 Pro Preview
Compare Mistral Medium 3 against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Gemini 3.1 Pro Preview API →Mistral Medium 3 API: FAQ
How do I call Mistral Medium 3 through ApexApi?
Create an ApexApi key, point your client at https://api.apexapi.dev/v1, and POST to /v1/chat/completions with the model set to `mistralai/mistral-medium-3`. The API is OpenAI-compatible, so an existing OpenAI SDK works once you change the base URL and key.
How much does Mistral Medium 3 cost on ApexApi?
$0.48 per million input tokens and $2.40 per million output tokens, all-in with no separate platform fee. You buy credits and pay per call, with no subscription or minimum.
What is the context window for Mistral Medium 3?
131,072 tokens.
Does Mistral Medium 3 support tool calling and image input?
Mistral Medium 3 supports tool / function calling, image (vision) input, and streaming responses.
What should I use instead of Mistral Medium 3?
From the same maker, Codestral 2508 costs less for lighter work and Mistral Medium 3.5 is the step up when this one falls short. Switching is one string: both run on the same endpoint and the same key, so there is nothing to re-integrate.
Ready to build with Mistral Medium 3?
One API key. Every major AI model. Pay only for what you use.
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