LLM Inference Optimization Layer

One unified LLM API.
Cut your AI costs to the minimum.

We sit between your app and every model provider — cost optimization, spending control, and failover happen automatically.

One flat 1% platform fee — vs. 5% on OpenRouter.

Sign in
1% fee
flat, all-inclusive
40–70%
avg. cost reduction

The architecture

Not another router. An optimization layer.

Your app talks to one endpoint. Everything that happens between your request and the model — routing included — is our job.

Your application

LLMRouter

Inference Optimization Layer

Cost Latency Reliability Execution
OpenAI Anthropic Google Fireworks + every major provider

Inside the layer: cost optimization

Six ways we lower your spend.

1

We negotiate lower prices

We negotiate volume pricing directly with LLM providers, so you get rates much cheaper than going direct.

2

We route to the most cost-efficient model

Every request is analyzed for task complexity and routed to the cheapest model that can handle it well.

3

We maximize cache hits

We cache your requests aggressively, so repeat and similar queries don't cost you a fresh model call.

4

We batch non-urgent requests

Latency-tolerant workloads run through provider batch APIs at up to 50% off, and we pass those savings straight through to you.

5

We serve our own models

For select workloads, we run our own LLMs — cutting out provider markup entirely.

6

We charge less

Just a flat 1% platform fee — vs. 5% on OpenRouter — on every request, every model.

Inside the layer: execution & reliability

One endpoint in. Every model, max uptime.

Your request lands on our routing layer, which health-checks providers continuously and fails over automatically — so your app stays online, and you pay a flat 1% fee no matter which model you pick.

Your app

🧩

OpenAI SDK

POST /v1/chat/completions

LLMRouter

Routing engine

  • 1 Continuous provider health checks
  • 2 Automatic failover, zero downtime
  • 3 Flat 1% fee, every model

Any model, one key

GPT-4o Claude Llama Mistral Gemini + your own

The full layer

Six optimizations. Model routing is just one.

Everything below runs automatically, on every request, under a single flat 1% fee.

💰

Cost optimization

Every request is priced against the cheapest model and provider that can handle it well — automatically, not by hand.

🎛️

Spending control

Set budgets and limits per key, project, or team, and get alerted before spend runs away — not after the invoice.

🔀

Model routing

One API for every major model. OpenAI SDK compatible, no code rewrite — swap models with a single string change.

🔁

Retry / failover

If a provider degrades or rate-limits mid-request, we fail over transparently — your app never sees the outage.

⚡

Caching

Repeat and similar queries are served from cache, so you're not paying for a fresh model call every time.

🚀

Performance optimization

We track latency and throughput per provider and route toward whoever is fastest for your workload right now.

Quickstart

Already on the OpenAI SDK? Change one line.

Point your base URL at LLMRouter and call any of 400+ models directly — same request format, one API key, a flat 1% fee.

  • OpenAI-compatible — no code rewrite
  • Works with any provider key, or bring your own
  • 1% fee on every request — vs. 5% on OpenRouter
route.py 
# pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://api.llmrouter.sh/v1",
    api_key="llmr_sk_...",
)

# Any of 400+ models, one API key
resp = client.chat.completions.create(
    model="anthropic/claude-opus-4.8",
    messages=[{"role": "user",
               "content": "Summarize this contract..."}],
)

print(resp.choices[0].message.content)
# → 1% platform fee, automatic failover included

Plug in once. Let the layer do the rest.

Create a developer account, grab an API key, and point your OpenAI SDK at us — cost, latency, reliability, and execution, optimized automatically.

Create your account Sign in

OpenAI-compatible · one API key · 1% fee.