GPT-5.1 mini

Overview

A smaller, cheaper member of the GPT-5.1 family that keeps much of the reasoning quality at a fraction of the price. Configurable reasoning effort and strong instruction-following make it a popular middle ground for production assistants that need more than a budget open model but can't justify flagship pricing. First-party hosted.

Benchmarks

Standardized scores (0–100), normalized across the catalog.

Providers

LLMRouteHub routes to the cheapest healthy provider by default.

Use this model

curl https://llmroutehub.com/api/v1/chat/completions \
  -H "Authorization: Bearer $LLMROUTEHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.1-mini",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'