See Every Token.
Control Every Dollar.
Real-time AI cost intelligence for Claude Code, Codex, and every model you use. Free, open-source, and runs entirely on your machine.
Free forever · Open source · No account required · 3MB
AI coding is powerful. AI costs are invisible.
Developers using AI coding assistants have zero visibility into how much they're spending — until the bill arrives.
Dark Spend
AI assistants charge per token, but there's no dashboard to see it in real time. You write a prompt, the tokens flow, and the dollars tick — invisibly.
No Visibility
You use Claude Code, Codex, and other tools — but costs are scattered across providers. No single view. No way to compare.
Bill Shock
You discover your AI spend only when the monthly bill arrives. By then, it's too late. No alerts. No budgets. No control.
Meet CostDog. Your AI spending watchdog.
A free, open-source desktop widget that gives you instant visibility into every token your AI tools consume.
Instant
Auto-scans your existing Claude Code and Codex logs. Zero setup required. Install and see everything in seconds.
Private
All data stays on your machine. Nothing leaves your network. No cloud. No account. No tracking.
Precise
Token-level granularity broken down by model, project, and session. Know exactly where your money goes.
Everything you need to see AI costs clearly
Real-time visibility, smart alerts, and deep insights — all running locally on your machine.
Real-Time Dashboard
Live token counts, costs, and session stats refreshing every 30 seconds. Never miss a spike.
Desktop Widget
Always-on-top floating bar that sits above your terminal. Costs at a glance, zero distraction.
Multi-Timeframe
Switch between Today, 7 days, 30 days, and All Time views. Spot trends instantly.
Model Breakdown
See which models cost the most — ranked by total spend. Know where your money goes.
Smart Alerts
Get warned when daily costs exceed your budget threshold. No more bill shock.
Multi-Tool Support
Claude Code and Codex in one view. More tools coming soon. One dashboard for everything.
Cross-Platform
Native apps for macOS (Intel + Apple Silicon) and Windows. 3MB installer. Done.
Local SQLite
All data stored locally in ~/.costdog/costdog.sqlite. Query it yourself if you want.
Open Source
MIT licensed. Inspect the code, contribute features, fork freely. Built in public.
Up and running in 4 steps
No SDK. No API keys. No configuration. Just install and see everything.
Install
Download the installer for your platform. macOS (.dmg) or Windows (.exe). Under 3MB. Done in seconds.
It Scans Automatically
CostDog reads your existing Claude Code and Codex session logs. No SDK. No API keys. No configuration.
See Your Costs
Real-time dashboard shows tokens, costs, and trends. Switch between timeframes. Drill into sessions.
Stay in Control
Set budget alerts. Monitor trends. Never be surprised by a bill again.
Free forever for individuals. Pro for teams.
Start free. Upgrade when you need team features, API access, and deeper insights.
Free
Everything you need to track AI costs.
- Desktop widget (Mac + Windows)
- All timeframes (Today / 7D / 30D / All)
- Claude Code support
- Codex CLI support
- Basic cost alerts
- Local SQLite storage
- Auto-refresh every 30s
- Open source (MIT)
Pro
For teams that need deeper insights.
- Everything in Free
- Team dashboard
- Custom alert thresholds
- Historical data export (CSV/PDF)
- API access
- Project-level cost breakdown
- Per-user cost attribution
- Priority support
Frequently asked questions
Everything you need to know about CostDog.
Stop guessing your AI costs.
Start seeing them.
Free forever. Open source. No account required.