Aider vs OpenCode

Aider and OpenCode are both AI Coding tools (Coding Agents). Below: what each costs, what it does well, its biggest catches, and who should pick which, all from public sources rather than our own testing.

Side by side

AiderOpenCode
CategoryAI Programming · Smart ProgrammingAI Programming · Programming
PricingFree (open source). You pay your LLM provider's token costs. (checked Oct 11, 2026)Free (open source). Go $10/mo, Go Plus $40/mo. Zen pay-as-you-go. (checked Oct 11, 2026)
Pros
  • Free, open-source terminal pair-programmer that works with almost any LLM, local models included
  • Git-native: every change is an atomic commit you can undo
  • Repo map and multi-file edits handle real codebases
  • Free, MIT-licensed terminal coding agent with 75+ providers and local models
  • No subscription gate. Bring your own key
  • Optional Go ($10/mo) and Zen pay-as-you-go model access
Catches
  • Terminal-only: no inline autocomplete or visual diffs
  • You manage context by hand, and setup takes configuration
  • API spend is uncapped. Heavy refactors on frontier models get pricey
  • You pay provider costs, which add up with heavy use
  • Zen needs a $20 minimum balance
  • Terminal-first, so it's less approachable for GUI users
Best forTerminal-first developers who want model choice and clean git history.Terminal developers who want an open, model-agnostic agent.
Skip it ifYou want an IDE with autocomplete and a GUI.You want a polished IDE with included usage.

Which should you pick?

Pick Aider if…

you fit this: terminal-first developers who want model choice and clean git history.

But not if: you want an IDE with autocomplete and a GUI.

Watch out for: Terminal-only: no inline autocomplete or visual diffs.

Pick OpenCode if…

you fit this: terminal developers who want an open, model-agnostic agent.

But not if: you want a polished IDE with included usage.

Watch out for: You pay provider costs, which add up with heavy use.

More options

Sources

Aider

OpenCode

Pros, catches and prices are compiled from public sources (official pricing and docs pages, published reviews, user reports), not hands-on testing. Prices change often, so check the vendor page before you buy.