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📖 The AI Tool Bible

AI Meter vs Braintrust

A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.

 
AI Meter
Evaluation
Braintrust
Evaluation
TaglineLocal usage meter that turns AI coding-agent tokens into estimated electricity and water consumption.Eval, monitor, and improve AI products end-to-end.
CategoryEvaluationEvaluation
PricingFree· Free for individuals and companies; open source under a public GitHub repo.Freemium· Starter: $0 · Pro: $249 · Enterprise: Custom pricing
Model—Platform (any LLM)
Editorial score—8.9 / 10
Use cases
Tracking daily token usage across Claude Code and CursorEstimating electricity draw of an AI-assisted coding sessionEstimating cooling water footprint of AI coding workflowsComparing energy efficiency between competing coding agentsAmbient menu-bar monitoring of local LLM consumptionPersonal ESG or FinOps rough-order-of-magnitude reportingAuditing which agent burns the most tokens per feature shipped
evalsmonitoringprompt management
Pros
  • 100% local processing — no accounts, no cloud, no API keys; reads existing provider files directly
  • Covers the five most-used local coding agents in one place (Claude Code, Codex, Cursor, OpenCode, Gemini CLI)
  • Transparent, user-adjustable math for kWh/token, PUE, and WUE rather than a black-box estimate
  • Open source on GitHub, so the deduplication and parsing logic can be audited
  • Free for individuals and companies with no gated tier
  • Native macOS widget makes ambient monitoring effortless during long coding sessions
  • Explicitly documents what it does NOT count (training, embodied hardware, grid carbon), which is rare for impact tools
  • Full eval + observability in one tool
  • Excellent UX
  • Strong dataset/experiment tracking
  • Closed loop dev → prod
Cons
  • macOS only — no Windows or Linux build, which excludes a large slice of the developer audience
  • Estimates are based on published research, not real telemetry from OpenAI/Anthropic/Google data centers
  • Ignores training energy, embodied hardware, networking, and grid-mix carbon, so figures understate true impact
  • Only tracks agents that write local usage files; hosted web chat sessions (chatgpt.com, claude.ai) are invisible
  • No API or export hooks documented, which limits integration with FinOps or ESG dashboards
  • Single-machine scope — no team roll-up view for a whole engineering org
  • Team pricing is steep
  • Smaller than LangSmith ecosystem-wise
Websiteai-meter.appwww.braintrust.dev
Pick AI Meter if
  • ✅ 100% local processing — no accounts, no cloud, no API keys; reads existing provider files directly
  • ✅ Covers the five most-used local coding agents in one place (Claude Code, Codex, Cursor, OpenCode, Gemini CLI)
  • ✅ Transparent, user-adjustable math for kWh/token, PUE, and WUE rather than a black-box estimate
  • ✅ Open source on GitHub, so the deduplication and parsing logic can be audited
Pick Braintrust if
  • ✅ Full eval + observability in one tool
  • ✅ Excellent UX
  • ✅ Strong dataset/experiment tracking
  • ✅ Closed loop dev → prod
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