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}What the LLM router does
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 go to your model as normal.
The result
Fewer LLM calls. Lower cost. Same output quality.
Works with your platform
Any OpenAI-compatible stack
Set your OpenAI client's [base_url] to SLNG and use your SLNG key.
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.
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.
Does this 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 does the LLM router reduce cost?
Most turns are simple. The router handles those locally without calling your LLM. Complex turns go to your model as normal. Fewer calls per conversation.
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.
Stay in the loop
Unmuted.
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