Free (Auto)
Smart Router Architecture
Auto-Tiered EngineDOS Smart Router (model: "auto") dynamically classifies query intent, token volume, and reasoning depth to dispatch across 3 destination tiers with zero markup and circuit breaker auto-failover.
Fast & Efficient
Tier 0Simple tasks, quick answers.
Balanced
Tier 1Everyday tasks, balanced capability.
Advanced Reasoning
Tier 2Complex problems, deeper reasoning.
Selected Models/Routing targets2 Active Targets
Simple and medium requests run on DOS.AI's self-hosted model; complex requests go to the first paid model in the escalation list. If a target is unavailable, the gateway falls back to another available route.
API Integration
Use the DOS API to integrate Free (Auto) into your applications. Compatible with standard OpenAI SDKs for easy drop-in migration.
curl https://api.dos.ai/v1/chat/completions \
-H "Authorization: Bearer $DOS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "free",
"messages": [
{
"role": "user",
"content": "Hello!"
}
]
}'Explore Related Models
Auto
DOS.AI Smart Router classifies each request by complexity. Simple and Medium requests use DOS.AI; Complex requests can use an eligible paid route configured in the live catalog.
Qwen3.8 27B (Free)
DOS
DOS curated meta-model for DOSClaw and first-party DOS products.