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j_filipe

5 karma · joined November 16, 2025

Building CostLens (https://costlens.dev) — AI cost attribution for engineering teams.

Previously: full-stack engineer working with Next.js, TypeScript, and LLM APIs.

Interested in: developer tools, AI infrastructure, cost optimisation.

submissions comments

Claude Fable 5 costs $10/$50M tokens – what that means in production

costlens.dev·8 pts·j_filipe·

Show HN: AI Efficiency Score – paste any GitHub repo, get a score in seconds

costlens.dev·2 pts·j_filipe·

Show HN: I built CostLens SDK to cut my AI bills by routing to cheaper models

costlens.dev·2 pts·j_filipe·