Aider vs OpenCode (2026)

Aider

by Aider (Open Source)

OpenCode

by Anomaly Innovations, Inc

Pros

• ✓Free and open source under the Apache 2.0 license, so the code can be audited, forked and run without a vendor account.
• ✓Works with many model providers, or a local model, through your own API key, so you pay only the provider's usage charges and can switch models at any time.
• ✓Commits every edit to git with a descriptive message, so AI changes can be reviewed with normal git tools or undone with the /undo command.
• ✓Builds a map of the whole repository and runs a linter after each edit, and a watch mode takes instructions written as code comments from any IDE or editor.

Limitations

• ⚠Terminal-first: using it comfortably takes familiarity with the command line, git and managing model API keys.
• ⚠No commercial support, SLA or compliance certification for the tool itself, and data handling depends on the model provider you connect.
• ⚠Model usage is billed by your provider, so spending and rate limits have to be watched and managed with that provider.
• ⚠The latest tagged GitHub release is v0.86.0 from August 2025, and the most recent commit to the repository is from May 2026.

Pros

• ✓Developers can log in with GitHub Copilot or ChatGPT Plus or Pro to reuse existing subscription quotas, or connect any of 75+ providers including local models, with no separate API billing required.
• ✓Multi-session parallel agents run on the same project, and MCP client support covers local and remote servers with OAuth, so tools such as Sentry and Context7 connect inside the same workflow.
• ✓No code or context is stored, the agent is MIT licensed, and Anomaly Innovations publishes a SOC 2 Type 2 report through its Trust Center.

Limitations

• ⚠Permissions start permissive: the Build agent edits files and runs shell commands without an approval prompt until a permission config is written, with only repeated identical calls and paths outside the project gated.
• ⚠Model access is separate from the free agent, so developers pay a provider directly or through Go or Zen, and manage keys and accounts for each provider they use.
• ⚠Enterprise per-seat pricing is quote-only, and the SOC 2 report and Data Processing Agreement are released through the Trust Center on request.