A tiny (~50M-param) AI model with a free web chat workspace and developer API, for experimenting with micro models.
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What is CORU-RRR PRO MEX?
A micro AI model, extended through developer innovation
CORU-RRR PRO MEX is a research-stage micro language model (roughly 50M parameters) from the independent RRR PRO MEX project, packaged as a free web chat app at coru-prime.pages.dev. It provides a conversation space for ideas, learning, coding, writing and creative problem-solving, plus real-time web search.
What makes it interesting is its developer-first angle: instead of chasing LLM-scale capability, CORU is designed so developers can extend the tiny model with their own architectures, APIs, tools and libraries. Chat history is stored locally in the browser only, and API keys are encrypted with AES-256-GCM.
For developers, CORU offers a free personal API key (100 requests per day, 3,000 per month) with an OpenAI-compatible interface, or you can bring your own endpoint and be billed by your provider. A Premium tier via a US$3/month Patreon membership (7-day free trial) unlocks higher quotas. CORU Free is available now, English only, web-based.
Platforms and languages
CORU-RRR PRO MEX Availability
Platforms
Languages
Capabilities
CORU-RRR PRO MEX Key Features
Conversational AI workspace
A chat space for ideas, learning, coding, writing and creative problem-solving in the browser.
Real-time web search
The assistant can search the live web to answer with up-to-date information.
Developer-extensible tools
Developers can extend the micro model with their own architectures, APIs, tools and libraries.
Local-only chat history
Conversations are stored in the browser only and never leave the user's device.
Free personal API key
Free key with 100 requests per day and 3,000 per month; bring-your-own OpenAI-compatible endpoint is supported.
Best for
Who uses CORU-RRR PRO MEX?
Independent developers and indie hackers
Experimenting with and extending a tiny (~50M-param) language model using their own tools and APIs
Startups and automation builders
Prototyping lightweight AI chat and automation flows with a free OpenAI-compatible API
Plans and access
CORU-RRR PRO MEX Pricing
Freemium
US$3/mo Patreon membership unlocks higher API quota (7-day free trial); free tier available
Common questions
CORU-RRR PRO MEX FAQs
What exactly is CORU?
CORU is an experimental, research-stage language model with about 50 million parameters. It explores how developers can stretch a tiny model's usefulness with custom architectures, APIs and tools — it is not meant to compete with full-scale LLMs.
Is CORU free?
Yes. The web chat app and a personal API key are free. The free API key is limited to 100 requests per day and 3,000 per month.
How do I upgrade to CORU Premium?
Premium is sold through a US$3/month Patreon membership to RRR PRO MEX, which unlocks higher API quotas. New members get a 7-day free trial.
How is my data handled?
Your chat history never leaves your browser — it is stored locally on your device. API keys are encrypted with AES-256-GCM.
Which platforms and languages does CORU support?
CORU runs as a web app in the browser, with an API for developers. The interface is English only.
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