The Sifter Agentic Proxy
Your agents are brilliant.
Your API bill is not.
Sifter is a drop-in gateway between your coding agents and the model provider. One environment variable, zero workflow changes, and the same work completes for roughly a third of the cost.
66.8%
lower cost to complete the same work.
Every $1,000 of agent spend becomes roughly $330. Measured with Claude Code on the Anthropic API: identical coding sessions run with and without Sifter, quality-checked turn by turn. Full methodology.
90 seconds, no audio required: what Sifter does, and how we measure it.
How it works
Three mechanisms, one gateway, no code changes.
Ship the evidence, not the repo
Agents resend their whole history every turn. Sifter selects the evidence a turn actually needs from a local index and keeps the working context bounded, deterministically and session-stable.
The right model, every turn
Read-only and narrow turns run on the fast, inexpensive tier. Edits, failures, and anything requiring deep source work route to the strong tier automatically, with escalation gated by real economics.
Engineered for the provider's cache
Providers charge far less when a request starts exactly like