NezhavsOpenChamber
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Nezha
hanshuaikang · Agent harness
OSS
Panel
6.30 spec wins
- Reliability
- 5.7
- Usefulness
- 6.0
- Cost
- 8.2
- Longevity
- 5.3
“It writes your commit messages too, so eventually nothing in the repository will be in your own words.”
OpenChamber
OpenChamber · Agent harness
OSS
Panel
6.33 spec wins
- Reliability
- 6.2
- Usefulness
- 6.5
- Cost
- 6.0
- Longevity
- 6.5
“Prompts can be scheduled daily, weekly or on a cron, so the agent can now disappoint you on a timetable.”
Spec by spec
| Spec | Nezha | OpenChamber |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | local |
| Platforms | macos, linux, windows | macos, linux, windows, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | No |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | YesCommand execution happens in the OpenCode agent OpenChamber launches; OpenChamber lets you reattach to a running terminal from any paired device. |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | YesMulti-run can put each parallel session in its own git worktree, and GitHub sessions can update or merge a pull request from inside OpenChamber. |
| Browser control | No | YesPreview opens the running app beside the conversation, and the desktop build has a built-in browser that can send an element's screenshot, styles and console errors to the agent. |
| Sandboxed execution | No | No |
| Multi-agent orchestration | YesSeveral Claude Code and Codex sessions run at once across projects; Nezha manages them rather than coordinating them into one task. | YesMulti-run gives one task to up to five models at once and Fusion merges the best parts of their results. |
| Headless / CI mode | No | No |
| Models | ||
| Backbone | via managed agents (Claude Code, Codex) | OpenCode |
| Bring your own model | NoModel choice belongs to the underlying Claude Code or Codex installation, which must be installed before Nezha is used. | Yes |
| Local models | No | No |
| Cost | ||
| Pricing model | byok | byok |
| Starts at | $0/mo | $0/mo |
| Free tier | Yes | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | GPL-3.0 | MIT |
| GitHub stars | 1,900 | 11,015 |
Which one would each critic pick
| Critic | Nezha | OpenChamber | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 6.8 | 6.3 | Nezha — Pick it when you run several agent sessions at once and keep losing which one is waiting on you; pick Nimbalyst if you want editors around the diffs as well. |
| El Crítico | 6.0 | 5.5 | Nezha — It discovers and manages sessions belonging to Claude Code and Codex, two products it does not control, so an upstream change to either one lands here as a bug. |
| El Profesor | 6.3 | 6.8 | OpenChamber — A goal is checked after every turn and the loop continues until it is met, blocked, or a limit is reached, which is a stated termination condition. |
| La Inversora | 6.0 | 6.5 | OpenChamber — 9,556 stars and over twenty-three thousand editor installations from a repository that did not exist before September 2025, with nothing charged for any of it. |
| La Jefa | 5.8 | 6.0 | OpenChamber — Self-hosted with an encrypted relay paired by scanning a code, which answers where the data goes and opens the question of whose phone is holding it. |
| El Hacker | 7.0 | 6.8 | Nezha — GPL-3.0, so a fork stays open, keys stay in whichever agent CLI I already configured, and the unsigned macOS build needs an xattr command before it will launch. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.