OSSsemantic-router 0.1 · graphai 0.0.7 · chunkers 0.0.10→

The semantic mesh for real-world AI.

Aurelio is an applied AI lab. We build the open-source mesh production agents are routed, retrieved and orchestrated on — Semantic Router, Semantic Chunkers, and GraphAI.

semantic-router · playgroundlive demo · 0 LLM calls

USER TURN

encode · cohere · 1024didle

ROUTER DECISION

route:travel

confidence0.94latency0.07ms · 0 llm callsactionflights.searchguard✓ passed

// routing production AI at

MCGRAW HILLRED HATPINECONEINTERNET ARCHIVEUK GOVERNMENTOPEN BRAIN INSTITUTEOPEASUPERAGENTUNIVERSITY OF SÃO PAULOi.AI INCUBATORWAVEMAKERBOLNA AIRADIANT LOGICLMSYSTEMSBRAIN STATION 23BIG JOBSAE

The mesh

Three libraries.
One semantic mesh.

R

DECIDE

semantic-router

sub-ms routes

C

INGEST

semantic-chunkers

semantic chunks

G

ORCHESTRATE

graphai

stateful graphs

R

semantic-router

aurelio-labs / semantic-router

Deterministic decisions for LLMs and agents.

A superfast decision-making layer. Route tool-use and safety calls in semantic vector space — no slow LLM round-trips.

$ pip install semantic-router

3,745docs ↗

// flagship

Semantic Router.
The fast decision layer.

Rather than waiting for slow, unreliable LLM generations to make tool-use or safety decisions, route every user turn in semantic vector space — at sub-millisecond latency.

Safety

Deterministic guardrails on every turn.

Scale

Thousands of tools, one decision call.

Speed

Sub-millisecond, no LLM in the loop.

router.py

1from semantic_router import Router, Route
2
3router = Router(routes=[
4    Route("travel",  utterances=["book a flight", "find a hotel"]),
5    Route("support", utterances=["talk to a human", "refund policy"]),
6])
7
8router("book me a hotel in lisbon")
9# → Route("travel") · conf=0.94 · 0.06ms

aurelio.ai

© 2026 Aurelio Labs · applied ai lab · MIT licensed

The semantic mesh for real-world AI.

Three libraries.One semantic mesh.

Semantic Router.The fast decision layer.

Three libraries.
One semantic mesh.

Semantic Router.
The fast decision layer.