Pi WebvsXum
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Pi Web
agegr · Agent harness
OSS
Panel
6.81 spec wins
- Reliability
- 6.0
- Usefulness
- 7.0
- Cost
- 8.7
- Longevity
- 5.7
“The interface ships in English, Simplified Chinese and Traditional Chinese, which is three more languages than most agents document at all.”
Xum
Coder · Agent harness
OSS
Panel
6.82 spec wins
- Reliability
- 6.3
- Usefulness
- 6.3
- Cost
- 8.3
- Longevity
- 6.2
“It renders mermaid diagrams and LaTeX in your terminal, so the agent can now hand you an architecture you did not ask for, beautifully.”
Spec by spec
| Spec | Pi Web | Xum |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | local |
| Platforms | macos, linux, windows, web | macos, linux |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | No |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | YesAgent turns are run by pi itself; Pi Web is the browser front end for them. | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | Yes |
| Browser control | No | No |
| Sandboxed execution | No | No |
| Multi-agent orchestration | No | Yes |
| Headless / CI mode | No | No |
| Models | ||
| Backbone | pi | Anthropic, OpenAI, Grok, Ollama, OpenRouter |
| Bring your own model | Yes | Yes |
| Local models | No | Yes |
| 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 | MIT | AGPL-3.0 |
| GitHub stars | 7,003 | 2,045 |
Which one would each critic pick
| Critic | Pi Web | Xum | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.3 | 7.3 | no preference |
| El Crítico | 6.5 | 6.3 | Pi Web — It runs a local server holding provider logins and API keys, and the row describes no authentication in front of it. |
| El Profesor | 7.0 | 6.8 | Pi Web — State is single-sourced: the interface reads the agent's own configuration and session files rather than maintaining a parallel copy that could diverge. |
| La Inversora | 6.8 | 6.5 | Pi Web — 5,917 stars is the largest number in this cohort and none of it is captured: the demand belongs to the agent underneath, and this is where it becomes visible. |
| La Jefa | 6.3 | 6.3 | no preference |
| El Hacker | 7.3 | 7.8 | Xum — AGPL-3.0, a prebuilt binary with no runtime to install, and Ollama sits beside the hosted providers in the model config, so local inference is a config value. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.