cerver is the thin layer under your AI: every session carries its transcript, model, compute, and cost as one object you control. Start online in seconds — attach your own machines when the work needs them.
no card · $5 free tier · local runs on the subscriptions you already pay
01 — The mix
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.
Today · all frontier
Right-sized · 25 / 35 / 40
02 — Swap underneath
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
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
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
Fan out to thousands of sessions at once. Click any agent and watch its session — the chat, the model, the compute, the cost.
Spending limits, on by default
Every account ships with a monthly cap. A runaway agent stops at your number — never at a $17k surprise.
Metered, capped, predictable
$2 per 1M tokens, billed monthly for what you actually used. No usage, $0 invoice — and your cap bounds the bill.
Your subscriptions do the work
On your own machines, sessions ride the Claude Max / ChatGPT plans you already pay for. Marginal cost: ~zero.
06 — Start
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.
Both take under a minute. Both come with the $5 free tier.
Start locally
Paste this in your terminal. It connects your computer and signs you in — your first session is one cerver run away, with your repos, tools, and CLI agents right where they live.
curl -fsSL https://cerver.ai/install.sh | bashStart cloud
We'll email you a sign-in link — your dashboard, your first hosted session, and the free tier are behind it. No install, no card.