Swap one OpenAI-compatible URL
Your agent config has a custom LLM endpoint. Set the LLM endpoint to SLNG's URL + your SLNG key.
1"custom_llm": {
2 "url": "{region}.llm-router.slng.ai"
3}Context router for voice agents
Not every turn needs your LLM
Fewer model calls per conversation.
Simple turns
Confirmations, greetings, consent speech, hold responses handled locally.
Complex turns
Reasoning, decision-making, ambiguous input. These get full context and go to your model as normal.
The result
Fewer LLM calls. Lower cost. Better output quality.
Works with your platform
Deepgram
Agent config - set the LLM provider to a custom endpoint - SLNG URL + key.
ElevenLabs
Agent settings - LLM - Custom LLM - set Server URL, Model ID, and key to SLNG.
Vapi
Assistant config - Custom LLM - set the endpoint to SLNG + your key.
Vocode
Agent config - set the LLM base URL to SLNG.
Bolna
Agent config - set the LLM endpoint to SLNG.
Voiceflow
Project settings - custom LLM - point the model endpoint at SLNG.
Any OpenAI-compatible stack
Set your OpenAI client's [base_url] to SLNG and use your SLNG key.
Compliance and security
Getting started
Live instantly. Results within 24hrs
Swap the URL in your agent config. We show you the numbers against your current LLM costs.
1. Get your SLNG key
Sign up at app.slng.ai. Get your API key.
2. Point to SLNG //
Set the LLM endpoint to SLNG's URL + your SLNG key.
3. See the results
Give it 24 hours. Your dashboard shows LLM cost, latency, and quality vs. baseline.
How does the Context router reduce cost?
The Context router evaluates each turn against the call context. Simple turns that don't need your model are handled locally. Only complex turns go to your LLM. Result: fewer model calls, lower cost, same conversation quality.
Does SLNG work with my agent platform?
If it has a custom LLM field or accepts an OpenAI-compatible endpoint, yes. ElevenLabs, Deepgram, Vapi, Vocode, Bolna, Voiceflow confirmed.
Do I need to change my voice or STT provider?
No. SLNG only touches the LLM layer. Your voice, your STT, your platform stay the same.
How much does it cost?
US$ 0.0033 per agent minute. No contracts. No minimums. Your voice platform billing is separate.
Is my data safe?
PII redaction built in. ISO 27001 certified. HIPAA compliant. GDPR compliant. SOC 2 Type II in audit.
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