free-ai-api-keys

mistralai/mistral-medium-3-5

Mistral: Mistral Medium 3.5

Context length
262K
Input / 1M tokens
$1.50
Output / 1M tokens
$7.50
Released
2026-04-30
Modality
text+image+file->text

About Mistral: Mistral Medium 3.5

Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex...

Call Mistral: Mistral Medium 3.5

Via OpenRouter: one base URL for every provider.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "mistralai/mistral-medium-3-5",
    "messages": [{"role": "user", "content": "Say hello"}]
  }'

Direct on Mistral AI:

curl https://api.mistral.ai/v1/chat/completions \
  -H "Authorization: Bearer $MISTRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "mistral-medium-3-5",
    "messages": [{"role": "user", "content": "Say hello"}]
  }'

Mistral AI keys

OpenRouter keys

OpenRouter keys work for mistralai/mistral-medium-3-5 regardless of the upstream provider.