Agnostic to harness, model, and compute. Session-focused. Each session is one object you control: its full transcript and cost, plus the harness, model, and compute it ran on. Checkout the usecases.

no card · $5 free tier · local runs on the subscriptions you already pay

01 — The mix

Stop running everything on the most expensive model.

Most fleets run 100% frontier by reflex. Your work isn't 100% frontier-shaped: about a quarter earns the best model, the rest doesn't notice the difference. A routing policy — rules you write, or one line of auto — makes the mix deliberate.

02 — Swap underneath

Keep the transcript. Swap the agent and the machine under it.

Same stage, same actor. The harness and the compute are props you can change mid-run — the transcript, the tools, and the identity stay bound.

03 — Compare

Run the same task on two agents. Stay on whichever wins.

The comparison runs itself, in one session. A real diff — not vibes.

$ cerver run --compare claude codex "add idempotency to the webhook"

  claude / sonnet   passes · retries on 5xx
  codex  / gpt-5   passes · cleaner backoff   ← better

→ you're now on codex for this task.

04 — Anywhere

Start online. Add the machine when the work needs one.

Hosted model sessions work instantly. When the session needs your repo, terminal, tools, or CLI agents, attach the relay and keep the same session boundary.

05 — At scale

Run thousands of agents in parallel. See every one.

Fan out to thousands of sessions at once. Click any agent and watch its session — the chat, the model, the compute, the cost.

06 — Start

Start online first. Then connect your own computer — it runs on the subscriptions you already pay for.

$ curl -fsSL https://cerver.ai/install.sh | bash

Online sessions work instantly, no setup. This one command then connects your machine: sessions run there through your existing Claude Max or ChatGPT plan — no per-token bills — with your repos, tools, Claude Code, and Codex right where they live.

under a minute · $5 free tier