The Most Token-Efficient Open-Source AI Agent
Claude Code-class capability. Lower cost than any Agent in its class.
tasks/2026-W18.md. Want me to sync to the team calendar?Cheapest. And Best.
Engineered for the best token economics — saving you the most time and money.
Don't take our word for it. Watch the network.
Not marketing copy. These numbers come from anonymous telemetry across all OpenClacky users, refreshed hourly.
What does this mean? About 85% off your input bill. Cached tokens are billed at ~10% of full price (as low as 1% on DeepSeek & MiMo) — the higher the hit rate, the more you save.
Saves tokens · Works with any model · Easy to install
Real feedback from real users, unedited.
Same project, 3 hours of coding — 8× fewer tokens than Hermes.
Under 100 MB install vs Hermes at 48 GB. The WebUI is fantastic. After using this, I realized multi-agent is unnecessary. Our entire cross-border e-commerce team is on it now.
Codex with the most expensive model couldn't solve it in 30 minutes. Clacky did it with kimi-k2.6. Windows setup is a breeze too.
Compared to Hermes and OpenClaw, OpenClacky's tool calling is rock solid. Works great with domestic models.
It takes so much trial and error to arrive at simplest design. You did it. This is the brilliance, clarity and elegance of ruby brought to agentic tooling. I'm blown away.
Creates awesome ping pong tutorial videos with OpenClacky
All quotes are genuine user feedback, published publicly or with permission.
Four things done right.
Tokens follow.
Not by cutting features — by compounding correct choices at every layer.
Ultra-High Cache Hit Rate
Session never restarts. Double-window cache markers. Insert-then-Compress reuses cache even during history compression — system prompt never mutates.
Minimal Toolset, Maximal Reach
Just 16 core tools. Capabilities extend via the invoke_skill meta-tool. Tool count isn't competitive advantage — task completion is.
Idle-time compression. Don't pay while you're away.
Step away for a meeting or coffee — the agent quietly compresses long context in the background. By the time you're back, the history loaded into the model is already down to its essence. The tokens normally burned between turns? Gone.
Pick your model. Pick your route.
Any OpenAI-compatible API, plug and play. Official direct, aggregated routing, compatible relays — the choice is 100% yours, and so is the floor on your cost.
Pick your model. Set your cost.
Bring your own key — completely free. Any OpenAI-compatible API works out of the box. Or use OpenClacky Keys for the hands-off path: direct upstream routing, 99% cache hits, official pricing.
Not locked to one vendor. Main task on Claude, subagents auto-route to DeepSeek — another big chunk of tokens saved.
Double-click to install.
No setup required.
Download, double-click, start using — environment, dependencies, Skills all ready. Desktop installer recommended; CLI also available for power users.
Double-click to install — full environment configured automatically
One line in your terminal — for developers who prefer the CLI
Skills are the soul of any modern agent
Summon them, build them, grow them, sell them — OpenClacky treats Skills as native capability, not plug-ins.
/ Summon any Skill
Type / to browse, fuzzy-search, and invoke instantly. Hundreds of Skills one keystroke away — no menus, no memorizing names.
Build Skills by chatting
Tell the agent what you want. It drafts the SKILL.md, breaks the steps down, runs validation. No code required.
Skills self-evolve
After each run, the AI reviews context and outcome, then updates the Skill itself. Next time you invoke it, it performs more reliably.
Open formats, ready to monetize
Compatible with Skill formats from any agent ecosystem. Polished Skills can be packaged, encrypted, licensed, and priced on your terms.
Once you master it,
package your workflow and sell it
Professionals are already building their own vertical AI experts on OpenClacky — encrypted distribution, license management, your own pricing.
10 years of legal expertise,
now running on every lawyer's desktop
"I just put my 10 years of expertise into every colleague's computer."
AI life planning assistant
for every major decision
"Wealth gets divided. Life wisdom in the system stays yours."
Junior doctors access
senior expertise instantly
"The veteran retired, but the expertise stayed."
Open-source code. Verifiable results.
All code is public, all data is public. One month in — every number can be checked.
Make every token earn its keep
Open, free, BYOK. Download OpenClacky and take back control of your AI budget.