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Harness Active Open source

Aider

Open-source AI pair programming in the terminal, with git-aware edits and multi-model support.

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Get Aider 4 methods
curl -LsSf https://aider.chat/install.sh | sh
Install script macOSLinux
Pricing Free See pricing ↗

Open source under Apache-2.0; you pay the model provider or use an existing subscription.

  • Free Free Open source; bring your own model API key

Prices as listed on 18 Oct 2026.

AboutAider-AI

Aider edits code in a local git repository through a conversational terminal interface. It supports multiple chat modes, automatic commits, many LLM providers, and an experimental browser UI.

Features Verified 1/8 ✓ yes ✗ no ? not verified
?
Worktrees
Keeps parallel work in separate git worktrees?
not verified
?
Parallel agents
Runs several agent sessions at the same time?
not verified
?
Subagents
Can an agent delegate work to child agents?
not verified
?
MCP
Connects to MCP servers and their tools?
not verified
?
Remote access
Can you follow or control sessions from another device?
not verified
?
Cloud sandbox
Runs work in a hosted sandbox rather than on your machine?
not verified
✓
Diff review
Includes a built-in diff or review screen?
yes
?
Plan mode
Has an explicit plan / approve-before-edit step?
not verified
Runs inside4
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