OpenCode offers a broader configurable agent and subagent framework; Aider offers a focused Git-oriented terminal pair-programming workflow. Both separate client software from model-provider cost.
OpenCode may fit when specialized agents, granular tool permissions, MCP, and broad provider configuration are central requirements.
Aider may fit when the team wants a narrower Git-centered terminal workflow with direct model and key configuration.
Neither open-source client makes cloud inference free, and broader configurability can increase setup and governance work.
Workflow guidance is separated from official product facts and should be tested on representative repository work.
| Decision area | OpenCode | Aider |
|---|---|---|
| Workflow scope | Primary agents, subagents, tools, and terminal workflows. | Terminal pair programming focused on repository changes. |
| Provider support | Many providers, OpenCode services, and local models. | Multiple APIs and OpenRouter through explicit model and key selection. |
| Permissions | Granular allow, ask, and deny rules by tool pattern. | Operational control through CLI, Git workflow, and configured environment. |
| Extensibility | MCP, skills, custom tools, and agent definitions. | Configuration, scripting, editor options, and model integrations. |
| Cost model | Provider usage, optional service, or local hardware. | Provider or aggregator API usage. |
| Adoption burden | More concepts to standardize across a team. | Narrower workflow but still requires key and model governance. |
Do not select an agent from subscription price or repository popularity alone.