Tuneloop compares what Codex and Claude Code actually ship
Tuneloop is a free, CLI that turns into a kept on the user's computer. Running the command npx tuneloop@latest analyze connects each session to concrete results such as merged , completed features, and changed files. It assigns spending to each or feature, allowing comparisons of outcome rates and average cost per session across Codex, Claude Code, models, and other setups.
It also scores task difficulty and how independently the assistant worked, then groups tool errors and important decisions. In one small set of recent personal data, Codex averaged $6.73 per session, and four of five sessions produced a that shipped. Claude Code averaged $4.94 per session.
The tools handled different mixes of work, so these numbers do not show that either one is better.
Key points
- Tuneloop is free, , and analyzes records on the user's own computer.
- Run npx tuneloop@latest analyze to begin the analysis.
- It links completed features, , and changed files to their costs.
- It measures task difficulty, independent work, tool errors, and key decisions.
- The sample figures are too small and uneven to prove which assistant performs better.