Gemini CLIvsZero
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Gemini CLI
Google · Terminal agent
#66OSSMCP
Panel
5.22 spec wins
- Reliability
- 6.0
- Usefulness
- 5.7
- Cost
- 4.5
- Longevity
- 4.7
“A 1M token context window and, since June 18, zero tokens for the free users who filled it.”
Zero
Gitlawb · Terminal agent
#6OSSMCP
Panel
7.02 spec wins
- Reliability
- 6.7
- Usefulness
- 7.0
- Cost
- 8.2
- Longevity
- 6.2
“It accepts image input in a terminal, a sentence that would have ended a career in 2019.”
Spec by spec
| Spec | Gemini CLI | Zero |
|---|---|---|
| Architecture | ||
| Category | Terminal agent | Terminal agent |
| Runs | local, sandbox | local, sandbox |
| Platforms | macos, linux, windows | macos, linux, windows |
| Context window | 1M tokens | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | No | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | Yes |
| Browser control | YesA first-party `browser_agent` subagent, disabled by default, drives Chrome 144+ through chrome-devtools-mcp with settings for sensitive-action confirmation and file-upload blocking. | YesBrowser and terminal control helpers ship with the npm and release builds; source builds need those helper binaries on PATH or configured in local-control settings. |
| Sandboxed execution | Yes | NoZero ships a native Linux sandbox helper using seccomp rather than Docker; source builds must build the `zero-linux-sandbox` helper separately. |
| Multi-agent orchestration | Yes | Yes |
| Headless / CI mode | Yes | Yes`zero exec` returns exit codes and has a documented GitHub Action recipe. |
| Models | ||
| Backbone | Gemini 3, Gemini 2.5 Pro, Gemini 2.5 Flash | OpenAI, Anthropic, Gemini, Groq, OpenRouter, DeepSeek, Mistral, xAI, Qwen, Kimi, GitHub Models, Fireworks, MiniMax, Ollama, LM Studio |
| Bring your own model | YesVertex AI authentication (with GOOGLE_CLOUD_PROJECT/GOOGLE_CLOUD_LOCATION or a service account) selects your own cloud deployment, and GOOGLE_GEMINI_BASE_URL / GOOGLE_VERTEX_BASE_URL redirect model requests to a proxy or gateway you run. Models themselves are still Gemini-family. | Yes |
| Local models | YesGOOGLE_GEMINI_BASE_URL and GOOGLE_VERTEX_BASE_URL explicitly permit plain HTTP to localhost, 127.0.0.1 or [::1], so a self-hosted Gemini-compatible endpoint works; the experimental Gemma Model Router also runs a local LiteRT-LM server on http://localhost:9379. No Ollama or LM Studio integration is documented. | Yes |
| Cost | ||
| Pricing model | mixed | byok |
| Starts at | n/a | $0/mo |
| Free tier | No | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | Apache-2.0 | MIT |
| GitHub stars | 107,222 | 1,688 |
Which one would each critic pick
| Critic | Gemini CLI | Zero | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 5.0 | 7.3 | Zero — Pick it if you want a terminal agent that lets you change your mind mid-task; pick Crush if you want the same shape with a longer track record behind it. |
| El Crítico | 4.8 | 6.8 | Zero — Package builds ship the browser and terminal control helpers; a source build needs those binaries on PATH and expects you to build the Linux sandbox helper separately. |
| El Profesor | 6.0 | 7.3 | Zero — Sessions can be resumed or forked, which makes a continuation a controlled variable, and the headless mode emits text, JSON or stream-JSON rather than prose only. |
| La Inversora | 4.8 | 5.5 | Zero — A permissively licensed terminal agent from a single publisher, in the most crowded category on this board, with nothing being sold at any point. |
| La Jefa | 4.8 | 6.8 | Zero — Nothing to license for sixty, and it is the rare tool that returns meaningful exit codes with a documented continuous integration recipe, so it can gate a build. |
| El Hacker | 6.0 | 8.5 | Zero — MIT, twenty-five providers with Ollama and LM Studio among them, and it works as an MCP server as well as a client, so my tools go both ways. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.