What is the context window of Free Models Router?

Free Models Router supports a context window of 200K tokens.

Is Free Models Router free to use?

Yes, Free Models Router is free to use via OpenRouter. Rate limits apply (typically 20 requests/minute or 200 per day on free endpoints).

How is LLM API pricing calculated?

LLM pricing has two components: input tokens (everything you send) and output tokens (what the model generates). Total cost = (prompt tokens × input rate + output tokens × output rate) / 1,000,000 × number of requests.

Free Models Router API Pricing — Free Input / Free Output per 1M Tokens

Q: How much does Free Models Router cost?

Free Models Router costs Free per million input tokens and Free per million output tokens via OpenRouter. Pricing was last updated Oct 29, 2026.

Free Models Router by Openrouter — Free input / Free output per 1M tokens via OpenRouter. Context: 200K tokens. Pricing last updated Oct 29, 2026.

Input / 1M tokens

Free

Output / 1M tokens

Free

Provider

Openrouter

Context window

200K tokens

Via

OpenRouter

Cost at common usage volumes

Usage	Daily	Monthly
Chatbot (100/day)	Free	Free
Small app (1K/day)	Free	Free
Mid-scale (10K/day)	Free	Free
Large scale (100K/day)	Free	Free

Model ID: openrouter/free
Data source: OpenRouter public API — updated Oct 29, 2026. Inference is free on OpenRouter (rate limits apply).

← Full cost calculator Compare models →

About Free Models Router

Free Models Router is an LLM developed by Openrouter. It is free to use via OpenRouter (subject to rate limits). It supports a context window of 200K tokens.

Pricing Details

Via the OpenRouter API:

Input tokens: Free per 1 million tokens
Output tokens: Free per 1 million tokens

A token is roughly 0.75 words. For context: a typical user message of 100 words is approximately 133 tokens; a 500-word system prompt is about 650 tokens.

How Much Does Free Models Router Cost?

For a typical chatbot application (1,000 requests/day, 1,000 prompt tokens and 500 output tokens per request):

Daily cost: Free
Monthly cost: Free

Accessing Free Models Router via OpenRouter

OpenRouter provides a unified API for 200+ LLMs including Free Models Router. You can use it with any OpenAI-compatible SDK by setting the base URL to https://openrouter.ai/api/v1 and using your OpenRouter API key. The model ID is openrouter/free.

Compare Free Models Router with Other Models

Use the AI Model Cost Comparison tool to compare Free Models Router against GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, or any other model side by side. Or use the LLM API Cost Calculator to browse all 456+ models sorted by cost for your specific usage.

Frequently Asked Questions

Yes. Free Models Router is available on OpenRouter with the model ID openrouter/free. OpenRouter provides a unified API compatible with OpenAI's SDK format.