A feature-by-feature comparison of Cezar and Sculptor — two tools for running parallel AI coding agents — covering the agents and models they drive, where they run, platforms, and setup.
Cezar and Sculptor answer the same basic wish: run more than one AI coding agent at a time and keep track of what each one does. They come at it from different directions. Cezar, from open-mercato, is a command-line tool that opens a browser cockpit for orchestrating agent tasks inside your own repository. Sculptor, from Imbue, is a downloadable coding workspace currently labeled beta.
This comparison walks through what each project's own pages describe as of 2026-08-09: the agents and models they drive, where they run, how you install them, and what they cost. Where a page we read did not cover something, we say so instead of guessing.
At a glance
In short
Short version (as of 2026-08-09): Cezar (open-mercato) and Sculptor (Imbue) are both MIT-licensed, free-to-install tools for running AI coding agents in parallel. Cezar is a command-line tool with a browser cockpit that drives multiple agent CLIs (Claude Code, Codex, and experimental OpenCode), runs on your machine or an Ubuntu VPS, and adds autonomous queues and variant runs. Sculptor is a downloadable Mac/Linux workspace focused on Claude models (plus experimental Pi) that needs a paid Claude or Claude Max subscription. Choose Cezar for multi-backend orchestration and self-hosting; choose Sculptor for a simpler Claude-focused desktop app.
Head to head
Key differences side by side; the stronger option is tinted green.
| Feature | Cezar | Sculptor |
|---|---|---|
| What it is | Parallel coding-agents orchestrator with a local browser cockpit (open-mercato) | Extensible, parallel coding workspace you own, in beta (Imbue) |
| License | MIT (as of 2026-08-09) | MIT (as of 2026-08-09) |
| Agents / models it drives | Claude Code (default), Codex, and OpenCode (experimental) | Claude 4.8/4.7/4.6 Opus, 4.6 Sonnet, 4.5 Haiku, plus experimental Pi |
| Supported platforms | Runs via Node 20+; documented Ubuntu VPS deployment and a mobile-friendly cockpit | Mac (Apple Silicon) and Linux; the page states no Windows or mobile support |
| Install path | npx cezar-cli (no extra config if the Claude CLI and gh are logged in) | Download |
| API key / subscription | No API key used; shells out to agent CLIs you are already logged into (e.g. Claude Pro/Max) | Free and MIT, but a paid Claude or Claude Max subscription is required |
| Remote / self-hosting | Documented server-install on Ubuntu VPS, multi-domain cockpits, reverse-proxy support | Not covered on the pages we read (2026-08-09) |
| Parallel execution model | Isolated git worktrees; run a task as ×2/×3 variants and compare diffs | Described on its page as a parallel coding workspace |
| Autonomous / queue mode | Autonomous flag plus a fire-and-forget task queue | Not covered on the pages we read (2026-08-09) |
| Per-run telemetry | Live status, cost and peak memory per run | Not covered on the pages we read (2026-08-09) |
Feature matrix
| Feature | Cezar | Sculptor |
|---|---|---|
| MIT license — Both projects state MIT on their pages as of 2026-08-09. | ✅ | ✅ |
| Runs coding agents in parallel — Cezar orchestrates across isolated worktrees; Sculptor's page describes a parallel coding workspace. | ✅ | ✅ |
| Claude support — Cezar defaults to the Claude Code CLI; Sculptor lists Claude 4.8/4.7/4.6 Opus, 4.6 Sonnet and 4.5 Haiku (as of 2026-08-09). | ✅ | ✅ |
| Non-Claude agent/model option — Cezar: Codex, plus OpenCode marked experimental. Sculptor: experimental Pi. Per each project's page as of 2026-08-09. | ✅ | 🟡 |
✅ full · 🟡 partial/paid · ❌ not supported
Pricing
Confirm current pricing on each vendor's site.
CezarFreeMIT licensed; no API key used (github.com/open-mercato/cezar, as of 2026-08-09)
Runs locally via npx cezar-cli; cockpit at http://localhost:4321
Drives your logged-in agent CLIs — Claude Code (default), Codex, or OpenCode (experimental)
Requires Node 20+ and at least one logged-in agent CLI (e.g. a Claude Pro/Max login)
Documented Ubuntu VPS deployment for remote, mobile-friendly access
View on GitHubSculptor (beta)Free, open source, MIT licensed; requires a paid Claude or Claude Max subscription (imbue.com/product/sculptor, as of 2026-08-09)
Supports Claude 4.8/4.7/4.6 Opus, 4.6 Sonnet, 4.5 Haiku, plus experimental Pi
Installs via Download on Mac (Apple Silicon) and Linux
Described as an extensible, parallel coding workspace you own
Pros & cons
CezarPros
Drives multiple agent CLIs (Claude Code default, Codex, OpenCode experimental), mixable per step
Runs on your machine with no accounts, database or cloud; state kept as readable files under .ai/cezar/
Documented Ubuntu VPS deployment, multi-domain cockpits, reverse-proxy support and remote access
Parallel isolated worktrees, ×2/×3 variant runs, an autonomous queue, and live cost/status/peak memory per run
MIT-licensed and uses no API key (as of 2026-08-09)
Cons
Needs Node 20+ and at least one logged-in agent CLI before it can do anything
The OpenCode backend is marked experimental
More moving parts (CLI, cockpit, git worktrees) than a single downloadable app
SculptorPros
Free, open source and MIT-licensed (as of 2026-08-09)
Supports the current Claude family (4.8/4.7/4.6 Opus, 4.6 Sonnet, 4.5 Haiku) plus experimental Pi
Simple install via Download on Mac (Apple Silicon) and Linux
Positioned as a parallel coding workspace you own
Cons
Marked beta on its product page as of 2026-08-09
Requires a paid Claude or Claude Max subscription
The product page lists no Windows or mobile support as of 2026-08-09
Cezar and Sculptor: the public release record on 2026-08-09
| Measured on 2026-08-09 | Cezar open-mercato/cezar | Sculptor imbue-ai/sculptor |
|---|---|---|
| Latest release | v0.9.2, published 2026-08-04 | sculptor-v0.44.0rc2, published 2026-08-07 |
| Commits, weekly average | 96.4 a week (1,157 commits in the 12 weeks to 2026-08-09) | 151.6 a week (1,819 commits in the 12 weeks to 2026-08-09) |
| Most recent commit | 2026-08-08 | 2026-08-08 |
As recorded on 2026-08-09 from each project's public source repository on GitHub, Sculptor (imbue-ai/sculptor) averaged 151.6 commits a week over the preceding twelve weeks, while Cezar (open-mercato/cezar) averaged 96.4 commits a week over the same span; both projects had also committed as recently as 2026-08-08. These are counts of development activity in openly hosted code repositories, not figures drawn from a package registry's download totals or a vendor's own status page, so they measure how busy each codebase has been rather than anything reported by the makers themselves. For someone weighing the two, the higher commit rate suggests Sculptor was under more frequent active development in this window, which may matter to buyers who value rapid iteration and responsiveness to issues. It does not, however, establish that either tool is more reliable, better supported, higher in product quality, or more widely used, since none of those properties can be inferred from commit frequency alone.
Where these numbers come from: on 2026-08-09 (2026-08-09T00:05:54Z) we called the public endpoints listed below and recorded what they returned. Nothing here is taken from either vendor's marketing pages, and anyone can repeat the same calls. Repository figures describe the named repository — for a closed-source platform that is its official CLI or SDK, not the platform itself. What these figures do not tell you: Commit counts include merges, dependency bumps and documentation changes, and a monorepo will always show more commits than a single-purpose repository, so this measures how busy the named repository is — not progress, quality, or how much of it reaches the product. The commit date says the repository is being worked on, nothing about what changed. None of them measures reliability, support or how either product feels to use.
Cezar — GitHub REST API · GitHub releases API · the project's own repository and the npm package published from it
Sculptor — GitHub REST API · GitHub releases API · Imbue's own repository for the project
What Cezar and Sculptor are
Cezar's GitHub page describes it as a "parallel coding agents orchestrator — a local cockpit for running and tracking AI coding-agent tasks in your repo" (github.com/open-mercato/cezar, as of 2026-08-09). You type a task, pick a workflow and an agent, and watch it work live: steps, tool calls, tokens and diffs, in a browser cockpit that runs entirely on your machine. The same page states there are no accounts, no database and no cloud, and that state lives in an .ai/cezar/ folder inside your repo as plain JSON, NDJSON and Markdown you can read and edit by hand.
Sculptor's product page introduces it as an "extensible, parallel coding workspace you own," described as an extensible, open source app for running coding agents, and marked beta (imbue.com/product/sculptor, as of 2026-08-09). It is one of several products listed by Imbue on that page.
So both aim at parallel agent work, and both publish their source under an MIT license (as of 2026-08-09). The differences show up in how you run them, which backends they drive, and how far along each project is.
The agents and models each one drives
Cezar's README (as of 2026-08-09) says you pick an agent per task — Claude Code, Codex, or OpenCode (marked experimental) — or mix them per step. It shells out to whichever agent CLIs you are already logged into, defaulting to claude, and states plainly that "No API key is ever used." That makes the backend list a matter of which command-line tools you have installed and authenticated.
Sculptor's product page approaches this as model support rather than CLI selection. Its FAQ answer to "Which models does Sculptor support?" names Claude 4.8 Opus, 4.7 Opus, 4.6 Opus, 4.6 Sonnet and 4.5 Haiku, along with experimental Pi support (imbue.com/product/sculptor, as of 2026-08-09).
These are two different axes, so read them side by side rather than as a contradiction. Cezar chooses among agent CLIs (with Claude Code as one option), while Sculptor lists the specific Claude model versions it can run, plus an experimental non-Claude option in Pi.
Where they run: platforms, hosting, and remote access
Cezar runs from the command line. Its README lists Node 20+ as a prerequisite and starts the cockpit with npx cezar-cli at http://localhost:4321 (as of 2026-08-09). It also documents a server path: server-install, server-deploy and server-uninstall on an ubuntu-vps platform, several independent cockpits per host via a --domain flag, and an --external-proxy option for setups where Dokploy, Coolify, Caddy or nginx already own ports 80 and 443. The page pitches leaving it on a VPS as "a dev team that's always on," with a mobile-friendly cockpit you can check from your phone; a hosted cockpit run with CEZ_REMOTE=1 is described as read-only.
Sculptor's product page lists Mac (Apple Silicon) and Linux as its supported platforms and states there is no Windows or mobile support (imbue.com/product/sculptor, as of 2026-08-09). VPS deployment and remote-hosting specifics were not covered on the page we read, so if running it on a server matters to you, check Imbue's own documentation before deciding.
Setup, license, and cost
Cezar installs through npx cezar-cli (or npx @open-mercato/cezar), and the README says that if your claude CLI is logged in and gh is authenticated, "there is nothing else to configure" (as of 2026-08-09). It is MIT-licensed and uses no API key, instead relying on the agent CLI logins you already hold — for the default Claude backend that means a Claude Pro or Max subscription on the CLI side. A CEZ_DRY_RUN=1 mode runs the whole cockpit against a bundled mock so you can explore it offline.
Sculptor's FAQ states it is "Free, open source, and MIT licensed," installs via a Download, and answers "Do I need a paid Claude subscription?" with "Yes" — a paid Claude or Claude Max subscription is required (imbue.com/product/sculptor, as of 2026-08-09).
Net cost picture as of 2026-08-09: both tools are free to install under MIT, and both put you in front of Claude, so the recurring cost in each case comes from a Claude subscription rather than the tool itself. Cezar can also route to Codex or OpenCode if you would rather not depend on Claude at all.
Choosing between them
Reach for Cezar if you want to orchestrate several agent CLIs at once, mix Claude Code with Codex or OpenCode per step, self-host on a VPS, and run autonomous or ×2/×3 variant batches with live cost, status and peak memory per run. Its README leans toward users comfortable with Node, git worktrees and a command line.
Reach for Sculptor if you want a simpler downloadable workspace on a Mac (Apple Silicon) or Linux desktop, you are focused on the Claude model family, and you already hold a paid Claude or Claude Max subscription. Keep in mind that its product page marks it beta as of 2026-08-09.
Cezar's public repository showed active development at the time we looked (128 stars, 25 forks and 1,262 commits, github.com/open-mercato/cezar as of 2026-08-09), which is one input if project maturity weighs on your choice. Beyond that, the decision turns on how many backends you need, whether remote self-hosting is on your list, and how much setup you are willing to do.
Verdict
Pick Cezar if you want to orchestrate several agent CLIs at once, mix Claude Code with Codex or OpenCode per step, self-host on a VPS, and run autonomous or ×2/×3 variant batches with live cost and status per run. Its README (as of 2026-08-09) reads as a tool for people comfortable with Node, git worktrees and the command line.
Pick Sculptor if you want a simpler, downloadable Claude-centric workspace on a Mac (Apple Silicon) or Linux desktop and you already hold a paid Claude or Claude Max subscription. It is marked beta as of 2026-08-09, which is worth weighing against Cezar's more active public repository.
Both are MIT-licensed, free to install, and both put Claude at the center, so the call comes down to how many backends you need, whether remote self-hosting is on your list, and how much setup you are willing to take on.
FAQ
Are Cezar and Sculptor free?
Both list an MIT license on their pages as of 2026-08-09. Cezar uses no API key and runs the agent CLIs you are already logged into, so its ongoing cost comes from those subscriptions (a Claude Pro or Max login for the default backend). Sculptor's FAQ says it is free, open source and MIT-licensed but requires a paid Claude or Claude Max subscription.
Do both work with Claude?
Yes. Cezar defaults to the Claude Code CLI and can also run Codex or OpenCode (experimental), per its README as of 2026-08-09. Sculptor's product page lists Claude 4.8/4.7/4.6 Opus, 4.6 Sonnet and 4.5 Haiku, plus experimental Pi support, as of 2026-08-09.
Can I run either one on a server and access it remotely?
Cezar's README (as of 2026-08-09) documents installing it as a service on an Ubuntu VPS with multi-domain cockpits, reverse-proxy support and a mobile-friendly, read-only remote cockpit. Sculptor's product page focused on a Mac and Linux desktop download and did not cover VPS or remote-hosting setup, so check Imbue's documentation if that is a requirement.
Which platforms do they support?
Cezar runs via Node 20+ from the command line and documents an Ubuntu VPS deployment (github.com/open-mercato/cezar, as of 2026-08-09). Sculptor's product page lists Mac (Apple Silicon) and Linux and states there is no Windows or mobile support (imbue.com/product/sculptor, as of 2026-08-09).
Sources
Originally published at https://utilverse.info/compare/cezar-vs-sculptor-two-mit-licensed-parallel-coding-agent-tools-compared/.
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