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?
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.
