Magistral-Medium-2509-Thinking | EmpirioLabs AI Docs

Provider: Mistral AI
Category: Text Generation
Endpoint: POST /v1/chat/completions
Context window: 40K
Served from: —

Reasoning model tuned for tasks needing longer thought and higher accuracy: legal research, financial forecasting, software, and storytelling.

At a glance

Field	Value
Model id	`magistral-medium-2509-thinking`
Input modalities	text
Output modalities	text
Context window	40K
Region	—
Features	reasoning, thinking
New	No
Native inference	No

Pricing

Charge	Spec	Rate
Input (text)	per 1M tokens	$2.60
Output (text)	per 1M tokens	$6.50

Example request

$ curl https://api.empiriolabs.ai/v1/chat/completions \
>   -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \
>   -H 'Content-Type: application/json' \
>   -d '{"model": "magistral-medium-2509-thinking", "messages": [{"role":"user","content":"Hello"}]}'

Parameters

Parameter	Type	Required	Default	Description
`temperature`	number	no	`0.7`	Sampling temperature · Range: 0 – 2
`top_p`	number	no	`1`	Nucleus sampling · Range: 0 – 1
`max_tokens`	number	no	`4096`	Max output tokens · Range: 1 – 65536
`frequency_penalty`	number	no	`0`	Range: -2 – 2
`presence_penalty`	number	no	`0`	Range: -2 – 2
`stream`	boolean	no	false	Server-Sent Events streaming
`stop`	string	no	—	Comma-separated stop sequences
`disable_formatting`	boolean	no	false	Return raw upstream response with no formatting wrappers
`enable_thinking`	boolean	no	true	Reason step-by-step before answering
`thinking_budget`	number	no	`32768`	Tokens reserved for thinking · Range: 1 – 393216

Live machine-readable schema is also available at GET https://api.empiriolabs.ai/v1/models/magistral-medium-2509-thinking.