comparison
Lacy Shell vs ShellGPT
Transparent routing vs explicit command prefix.
The core difference
ShellGPT (sgpt) requires you to type sgpt before every query. Lacy detects whether your input is a command or natural language and routes automatically — no prefix needed.
| Lacy Shell | ShellGPT | |
|---|---|---|
| Invocation | Just type — automatic detection | sgpt "query" |
| AI backend | Any CLI (Claude, Gemini, OpenCode, etc.) | OpenAI API |
| API key required | No (uses your installed CLI tool) | Yes (OpenAI key) |
| Real-time indicator | Yes — green/magenta as you type | No |
| Shell integration | Deep — plugin hooks into shell execution | Standalone command |
| Smart reroute | Yes — failed NL commands auto-reroute | No |
| Mode switching | Ctrl+Space toggle (shell/agent/auto) | N/A |
| Language | Shell (ZSH/Bash) | Python |
| Dependencies | None (pure shell) | Python, pip |
The friction difference
With ShellGPT, you decide in advance that you need AI and type sgpt. With Lacy, you just type what you mean. If it’s a command, it runs. If it’s a question, it goes to AI. The routing is invisible.
This matters most when you’re in flow. You don’t want to stop and think “is this a command or a question?” — you just want to type and have the right thing happen.
When to use Lacy
- You want zero-friction AI access without remembering a prefix
- You already use Claude Code, Gemini CLI, or another AI CLI
- You prefer no Python dependencies
- You want real-time visual feedback on routing
When to use ShellGPT
- You want a simple, standalone tool with explicit control
- You prefer OpenAI’s API specifically
- You want shell command generation with
--shellflag - You don’t want any shell-level hooks or modifications