Tailscale's Aperture gateway now supports passthrough mode for Claude Code and OpenAI Codex subscriptions, letting developers see the actual token costs behind their $20/month flat-fee plans. By routing Claude Code through Aperture (editing a single config file), users get per-request cost breakdowns, cross-device usage tracking, and guardrails. Real examples show a simple greeting costs $0.31 due to system prompt caching, a browser game built with Claude Sonnet 4.6 ran $3.29, and a complex home automation project on Opus hit $32.76 — all invisible under a flat subscription. Aperture also enables model selection controls, MCP tool access, and data guardrails, with richer features available for API-key-based usage and teams.
Table of contents
Connect your subscription to ApertureConnecting a coding agentWhat you can do: see what models actually do (and cost)What Aperture adds to coding agent subscriptionsWhat you can’t do: sneak around usage rules3 Impressions