AtlasBurn

AtlasBurn is a cost-monitoring tool for teams that build on large language model APIs. It tracks spend and token usage across OpenAI, Anthropic and Google Gemini in real time, forecasts what your bill will be, and lets you set budget guardrails that stop runaway spending before the invoice arrives.

It is built for the problems that hit AI-native apps as they scale: retry storms where one timeout triggers cascading calls, expensive models being used for simple requests, and agent workflows that quietly multiply the number of model calls. AtlasBurn surfaces these patterns so engineering and finance can see where the money goes.

Pricing: AtlasBurn is free during its beta, with no credit card required.

Good fit if you: run an app or agent that calls LLM APIs in production and want alerts and hard limits on spend.
Less ideal if you: only use ChatGPT or Claude through their normal chat apps rather than the API.