Runcost

Python/JS/Go library for pricing AI model usage from provider responses.

runcost.com

Meet Runcost

RunCost is a library and API for pricing AI model usage. It provides deterministic cost calculation from normalized usage or provider responses, supporting OpenAI, Anthropic, Gemini, AWS Bedrock, and many other providers. It includes a Python SDK (runcost-ai on PyPI) with sync/async clients, budget estimation, reconciliation, and framework integrations (LangChain, Vercel AI SDK, LlamaIndex, etc.).

Key features

• Multi-provider AI cost calculation
• Python, JavaScript, Go support
• Framework integrations (LangChain, Vercel AI SDK)
• Budget estimation and reconciliation
• Custom price cards and discounts

What it's used for

Tracking AI API costs, building cost-aware AI applications, and auditing model usage.

Pricing

Free Open-source library (PyPI package).

Platforms

• CLI
• API

Who is it for?

Developers building AI applications who need cost visibility.

Try it today

runcost.com