Chaser is a 100% local orchestrator that sits between you and the Anthropic API: it routes each task to the cheapest model that can handle it, and hands off context between sessions so you stop re-explaining your codebase every morning. No data ever leaves your machine.
⬇ Free check — Chaser Check Buy Chaser →Chaser Check is free: it installs the prerequisites and verifies your machine is ready. The full product activates after purchase. Windows 10/11 — a macOS version is in preparation.
Your Anthropic bill keeps climbing because a deep model gets called for work a cheaper one could have handled just fine. Multiply that across a team, or across a few months of daily use, and the API line item stops looking like a rounding error.
Then a session crashes mid-task, or you simply open a new one the next morning — and every decision, every fixed bug, every bit of accumulated context is gone. You start over, explaining the same architecture and the same conventions you explained yesterday.
Most tools only chase the API invoice. Chaser also compresses tool outputs before they ever enter the conversation, so your Claude Code subscription quota lasts longer. Two separate wallets, two separate defenses.
10% of all compressions are randomly held out and checked, never cherry-picked. Every result is sealed in a hash-chained, Merkle-rooted log you can audit yourself — not "our own counters".
Context handoff between Claude Code sessions happens automatically, with no manual re-explaining. Long-term memory is organized in layers, so a new session starts on a distilled summary instead of a wall of raw facts.
Chaser blocks dangerous commands like rm -rf ~ and curl | sh, and catches
hardcoded secrets before anything executes. It runs before the action, not after the damage.
Contextual bandits drive model routing, semantic caches are gated instead of blindly trusted, and savings are backed by anytime-valid statistics. Builds are reproducible and ship with an SBOM.
Your prompts, your API key and your data never leave the machine. The Cockpit dashboard runs on localhost, and uninstalling from Windows is a clean, single-step process.
Every number here follows one rule: no figure is asserted without its confidence interval attached. Where a bound is empirical, we say so. Where two measurements come from different populations, we say that too — and we do not combine them into a single flattering headline.
A public, reproducible benchmark of 30 verifiable tasks (10 trivial, 10 medium, 10 complex), run as two matched arms: the Chaser cascade versus direct Sonnet. Each task is played by both arms, so the delta is measured on the same task rather than on two different populations.
Raw machine-readable data: /bench/index.json · full benchmark page
An unmodified fork of AI-Scientist-v2 (SakanaAI) run through an OpenAI-compatible facade,
integrated solely via OPENAI_BASE_URL — zero patches to the fork.
These two figures measure different populations and do not add up. Each claim carries three independent signatures: integrity (Merkle RFC 6962 + Ed25519), execution (attested replay) and validity (adversarial Skeptic review).
All raw data behind these figures is public and independently verifiable. The hypotheses, protocols and reviews cited in the AI-Scientist report are AI-generated — that report states so explicitly.
A one-time purchase. No extra subscription: Chaser is a local product you install once, with no recurring cost and no dependency on a third-party service.
Launch pricing. Chaser Check — the diagnostic installer — is free. The full product (routing engine, Shield, memory, Cockpit) unlocks after purchase with a personal, named license key. Runs on Windows 10 and 11; a macOS version is in preparation.
Everything stays on your machine. Chaser doesn't send anything to a third-party server — the only network calls are the ones you already make to the Anthropic API. Local memory is human-readable and can be inspected or deleted at any time from the Cockpit.
Yes. Chaser is reversible in a single command, which removes the hooks and restores your previous configuration. It also uninstalls from the standard Windows "Apps & features" panel.
Chaser Check installs missing prerequisites (Python, Node.js, Git, Claude Code) and runs a read-only local diagnostic showing what Chaser could lighten — for example how many MCP tool schemas are inflating your system prompt. It doesn't include the routing engine, Shield or memory features; those require a license key.
They're two separate wallets. Your API key is billed per token used — routing, caching and the cascade aim to lower that bill. Your Claude Code subscription has its own usage quota, which session recycling and output compression help you spend more slowly, independently of API cost.
The routing, cascade and caching logic doesn't depend on today's specific prices — it works as long as a cost or capability gap exists between models. If Anthropic changes its lineup, the routing rules adapt; only the absolute figures in the traces would shift.
The downloaded Chaser-Check.exe must have exactly this SHA-256 fingerprint:
1d1f84d0193737a05bbe2cded0a542a52e677c13b74036ccd863b460558841e4
On Windows, open PowerShell and paste: Get-FileHash "$HOME\Downloads\Chaser-Check.exe" -Algorithm SHA256 — the fingerprint must match. You can also check it on VirusTotal.
Publisher: Ken Caroly · 100% local — no data sent · reversible in one command