Guide · Updated June 2026

CodeBurst: a free OpenRouter alternative — one API for many LLMs

If you like the idea of OpenRouter — a single endpoint that gives you access to many AI models — but you want it to be genuinely free, CodeBurst is built for exactly that. One OpenAI-compatible API, automatic routing and failover across many providers, and a free tier that runs on $0 models.

What is an LLM router?

An LLM router sits between your app and dozens of AI models. Instead of integrating Mistral, Llama, Gemini, Qwen, DeepSeek and others one by one — each with its own SDK, keys, rate limits and outages — you call one endpoint. The router picks a capable model, and if a provider is slow or down, it transparently fails over to the next one. OpenRouter popularized this pattern. CodeBurst follows it, with one difference that matters for hobbyists, indie hackers and prototypes: the default path costs you nothing.

How CodeBurst compares to OpenRouter

One endpoint, many models

CodeBurst is fully OpenAI-compatible — point any OpenAI SDK at it and change two lines:

curl https://codeburst.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_CODEBURST_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "codeburst-best",
    "messages": [{"role":"user","content":"Hello!"}]
  }'

Use codeburst-best and the router chooses a strong free model and fails over automatically. Or pin a context size — codeburst-128k, codeburst-256k, codeburst-1m — when you need a bigger window. Behind every alias is a continuously health-checked chain of providers, so a single provider's rate limit or outage never takes your app down.

Why "free" actually stays free

CodeBurst's free tier enforces a hard rule: a model only joins the free chain if it is verified to cost $0 in and $0 out, and it is automatically ejected the moment its pricing changes. That billing invariant is checked on a schedule, not assumed — so "free" doesn't quietly turn into a bill.

More than a router: a chatbot for your site

Because CodeBurst already routes across models, it also ships the thing most sites actually want: a hosted AI chatbot you add with one line of code. It answers visitors, captures leads, and runs on the same free routing underneath. See how the embed works →

Get started in 60 seconds

Grab a key, send your first request, done.

FAQ

Is CodeBurst a free OpenRouter alternative?
Yes — same one-API-many-models idea, but the free tier runs on $0 models so you pay nothing.

Is it OpenAI-compatible?
Yes. Standard /v1/chat/completions; change the base URL and key and your existing code works.

Do I need a credit card?
No. Start free.