Ryan Chen

Founder of Calcis. Building dev tools

About

Building Calcis. A pre-flight cost estimator for LLM APIs. I got a $400 surprise bill on my first production push and built a tool so that never happens to anyone else. Based in Sydney

Badges

Tastemaker

Gone streaking

Gone streaking 5

Maker History

CalcisKnow what your LLM calls cost before you make them.
Apr 2026

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Joined Product HuntApril 19th, 2026

Forums

p/calcis

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1mo ago

What's the most you've ever been surprised by an LLM API bill?

Building Calcis got me thinking about how often developers get caught off guard by unexpected API costs. What's your worst bill shock story? A prompt change that tripled costs? A model swap that wrecked your budget?

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1mo ago

Calcis - Know what your LLM calls cost before you make them.

Know exactly what every LLM API call will cost before you make it. Pre-flight cost estimation for OpenAI, Anthropic, and Google models. 25+ models tracked. Prices updated within hours of provider announcements. Works in your browser, CLI, GitHub Action, VS Code, LangChain, LlamaIndex, Vercel AI SDK, and as an MCP server for Claude Desktop and Cursor. No more bill shock. Estimate first, ship with confidence.

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2mo ago

Hello!

Hey! I'm Ryan, a dev from Sydney. I like building things, breaking things, and occasionally shipping things. Stoked to be here."Hey everyone! I'm Ryan, a developer from Sydney, Australia. I spend a lot of my time building developer tools and side projects, mostly things I wished existed but couldn't find. When I'm not coding I'm probably complaining about code. Happy to be here and looking forward to seeing what everyone's working on.