Comparison
aibill vs ccusage
First, credit where it's due: ccusage is excellent.It's mature, fast, widely used, and it popularized the idea that local coding-agent logs can tell you what usage would cost at API rates. It now documents both Claude Code and Codex support. If you want a detailed local usage readout, it's a strong choice.
aibill starts from the same insight — read the logs you already have — and asks the next question: okay, that's the number. Now what? It adds API-rate comparison beside plan context, evidence-ranked candidates with approval and matched verification, hook-aware Context Health, and optional official provider cost reports kept separate from local estimates.
| aibill | ccusage | |
|---|---|---|
| Local agent coverage | Claude Code + Codex | 15 local sources; Codex support is experimental |
| Claude Code session logs | Yes | Yes |
| Codex session logs | Yes | Yes — documented as beta |
| Estimates usage at API-equivalent rates | Yes | Yes |
| Primary focus | Evidence-constrained spend decisions | Detailed local usage and cost reporting |
| Adds official provider cost reports (OpenAI/Anthropic admin key) | Anthropic live-verified; OpenAI auth/endpoint exercised, non-empty reconciliation pending | Not a stated focus |
| Subscription-vs-API plan math | API-rate comparison beside detected/declared plan; no entitlement inference | Block, quota, and usage reporting |
| Evidence-ranked action candidates | Observed exposure locally; modeled $ only with a source-supported counterfactual | — |
| Context inventory and invocation coverage | Yes — loading/overhead stays unmeasured where the host does not expose it | — |
| Local-first, no telemetry | Yes | Yes |
| Open source | MIT | MIT |
| Install | npx aibill | npx ccusage |
Reviewed against ccusage's documentation on July 28, 2026 — check ccusage.com for the current feature set. “—” means not a stated focus, not necessarily absent.
Which should you use?
Use ccusage when detailed Claude Code or Codex usage reporting is the job. Use aibill when you want the decision layer on top: plan economics, evidence-backed actions, and — when you connect an admin billing key — official provider cost reports beside local estimates. Both are free and local-first; running both is a sensible comparison.