A recent XDA piece captured a small habit worth killing: screenshotting an error, opening a browser tab, pasting it into a chat, waiting for a fix, and then flipping back to the terminal. Wiring the model into the shell shortens the loop to one command. This roundup covers the best apps for terminal AI assistants on Windows, macOS, and Linux, spanning full AI-native terminals, one-command CLIs that read piped output, and privacy-first local runners. Each pick answers the same question, “help me with this shell error,” but the trade-offs differ.
Quick comparison
| App | Best for | Platforms | Free plan | Starting price | Standout |
|---|---|---|---|---|---|
| Warp | AI-native terminal with block-based history | Windows, macOS, Linux | Yes | Pro plan under $20/mo | Command palette, blocks, inline AI |
| Claude Code | Agentic coding right in the shell | Windows, macOS, Linux | Yes with a Pro plan | Included with Pro | Reads the repo, edits files, runs tests |
| Aider | Pair-programming loop in any repo | Windows, macOS, Linux | Yes | Free, plus model costs | Diffs each change, commits per edit |
| ShellGPT | One-line shell question CLI | Windows, macOS, Linux | Yes | Free, plus API cost | Answers with a runnable command |
| aichat | Multi-provider chat, RAG, shell integration | Windows, macOS, Linux | Yes | Free, plus API cost | Roles, sessions, file context, RAG |
| GitHub Copilot CLI | Copilot suggestions from the terminal | Windows, macOS, Linux | Free tier | Copilot subscription | Deep GitHub integration, explains commands |
| Fig | Auto-complete plus AI hints | macOS, Linux | Yes | Team tier available | Great completion engine, subshell hints |
| Ollama | Local models the CLI can call | Windows, macOS, Linux | Yes | Free | Offline models, OpenAI-compatible API |
What to look for in a terminal AI
Terminal AI is different from a coding chat window in three ways.
- It reads the actual error, so it does not need you to paraphrase
- It runs where the fix lives, so it can suggest a command you paste back
- It sees the shell history, so follow-ups do not restart the conversation
- It should support a private model when the command touches credentials
- It should get out of the way when you know what you are doing
1. Warp, best for an AI-native terminal
Warp is a full terminal reimplemented around blocks, an AI command palette, and shared workflows. Highlight an error block, ask “why did this fail,” and the model reads the surrounding output before answering.
Where it falls short: Warp uses an account by default and syncs some data to the cloud, though a fully local mode exists. Linux support arrived after macOS and Windows and still lags on a few features.
Pricing:
- Free: personal use, generous AI limits.
- Paid: Pro plan under $20/mo for higher limits and team features.
Platforms: Windows, macOS, Linux.
Download: Site
Bottom line: the option to try first if you are open to switching terminals.
2. Claude Code, best for agentic coding in the shell
Claude Code is Anthropic’s CLI that reads a repository, edits files, runs tests, and commits changes under your supervision. Ask it to “fix the failing spec in tests/user_spec.rb” and it does the whole loop.
Where it falls short: a Pro subscription is required and the model has to run against the network. Long, self-directed sessions can get expensive without limits set.
Pricing:
- Free: none for full agentic runs.
- Paid: Anthropic Claude Pro subscription.
Platforms: Windows, macOS, Linux.
Download: Site
Bottom line: the closest thing to a coworker who accepts SSH.
3. Aider, best for a pair-programming loop
Aider sits in a git repo and edits files based on your prompts, committing every change with a message. It supports many models and works well with GPT, Claude, and local runners.
Where it falls short: diff-based edits still need a human review pass, and larger refactors benefit from breaking the ask into smaller prompts.
Pricing:
- Free: open source, no tiers.
- Paid: none for the tool. You pay the model API you use.
Platforms: Windows, macOS, Linux.
Bottom line: pick this when the workflow is “small, reviewed changes committed one by one.”
4. ShellGPT, best for one-line shell answers
ShellGPT is a tiny CLI that takes a natural-language question and returns a runnable command. Prefix a broken command with s or ask “how do I find files larger than 100 MB modified today,” and it prints the answer.
Where it falls short: it is a request-and-response CLI, not a session. Multi-step tasks are better handled by Aider or Claude Code.
Pricing:
- Free: open source, no tiers.
- Paid: none for the tool.
Platforms: Windows, macOS, Linux.
Download: GitHub
Bottom line: the quickest install-to-answer terminal AI.
5. aichat, best for a versatile chat CLI
aichat wraps many providers in one command with roles, sessions, shell integration, and light RAG for local files. Point it at a folder and ask questions about the code inside without leaving the shell.
Where it falls short: the feature surface is broad and takes a config pass to tune, and the RAG layer is basic compared with a purpose-built tool.
Pricing:
- Free: open source, no tiers.
- Paid: none for the tool. You pay the model API you use.
Platforms: Windows, macOS, Linux.
Download: GitHub
Bottom line: the tool for anyone who wants ShellGPT plus sessions and file context.
6. GitHub Copilot CLI, best for Copilot inside the terminal
GitHub Copilot CLI brings the Copilot model into the shell as a suggest-and-explain command. It knows git and gh out of the box, so “how do I revert the last two commits” returns a safe answer with context.
Where it falls short: it is scoped to Copilot’s understanding of the command line, and it depends on a Copilot subscription.
Pricing:
- Free: limited tier.
- Paid: Copilot subscription.
Platforms: Windows, macOS, Linux.
Download: GitHub
Bottom line: the pick for people already paying for Copilot.
7. Fig, best for auto-complete plus AI hints
Fig improves terminal auto-complete with IDE-style suggestions and pairs the completions with AI hints for the current command. It is more of a productivity layer than a chat, and that is the point.
Where it falls short: the project has changed hands since its early days, and Windows support is limited. Check the current maintenance status before committing.
Pricing:
- Free: personal use.
- Paid: team tier for shared config.
Platforms: macOS, Linux.
Download: Site
Bottom line: the pick when good completion matters more than a chat window.
8. Ollama, best for a local model behind any CLI
Ollama exposes an OpenAI-compatible API for local models like Llama, Mistral, and Qwen. Point ShellGPT, aichat, or Aider at it and every prompt stays on the machine.
Where it falls short: local models are smaller than a frontier cloud model, so their answers are simpler. GPU or Apple Silicon speeds them up dramatically.
Pricing:
- Free: open source, no tiers.
- Paid: none.
Platforms: Windows, macOS, Linux.
Bottom line: the private backend to bolt onto any of the CLIs above.
How to pick the right one
- If you want a new terminal that turns AI into a first-class citizen, install Warp.
- If you want the AI to read your repo and edit files, use Claude Code or Aider. Claude Code is agentic, Aider is a pair-programmer.
- If you want to keep your current terminal and answer one shell question at a time, install ShellGPT or aichat. aichat wins on sessions and file context.
- If you already pay for Copilot, GitHub Copilot CLI is the free upgrade.
- If completions are your bottleneck, Fig is the fix.
- If the shell touches secrets or private code, run Ollama locally and point any of the above at it.
FAQ
Can I use a terminal AI without sending my commands to the cloud? Yes. ShellGPT, aichat, and Aider can point at a local Ollama endpoint, and Warp has a local mode. Pick a small model that fits your machine and expect simpler answers than a cloud frontier model.
Which one gives the shortest install-to-first-answer? ShellGPT. It is a single install and a single command. aichat is a close second if you want sessions.
Do these tools understand my repo? Claude Code and Aider do, out of the box. aichat can with a small config pointing it at the folder. The rest are single-command tools that answer without repo context.
Is Warp free for personal use? Yes. Warp Free covers personal usage with generous limits, and the Pro plan under $20/mo lifts them.
Can I bind these to a keybinding? All of them are shell commands, so an alias, a shell function, or a keyboard shortcut in your terminal emulator does the job. Warp does it natively.
