Aneirin
Cut your Claude Code & Copilot token bill, losslessly
Aneirin launched on July 1, 2026 with 5 votes, #4,557 of 24,623 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.
What it does
Claude Code and GitHub Copilot resend your whole conversation every turn, including pages of the model's own old "thinking" and context repeated word-for-word. You're billed for all of it. Aneirin is a local proxy that strips the redundant, re-billed tokens before the request leaves your machine, losslessly: the model still gets everything it needs, your answers are identical, your bill drops. 100% local, zero telemetry, your prompts never leave. Free up to 5M optimized tokens a day, no account.
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