Show HN: Frugon – A tool to identify LLM calls that could be replaced with cheaper models (local, MIT)

Frugon is an open-source LLM cost analysis tool that runs on the user's local environment. By analyzing LLM call logs, it determines whether a cheaper model would suffice in place of the one currently in use, and suggests ways to reduce costs.

Key Features:

• Privacy protection: All analysis is performed on the user's local machine, and no data or API keys are sent to external servers.
• Flexible data input: It can directly read OpenAI-format JSONL files, or capture calls in real time through a local HTTP proxy (shim).
• Easy installation: It can be run instantly via pipx or uvx, and with the frugon[measure] option you can also sample and measure actual prompts.
• License: It is a free tool provided under the MIT License.