Agentic Index
Aider vs OpenCode (2026)
Aider and OpenCode are both free, model agnostic terminal agents with bring your own key economics. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.
Aider is the veteran, with a tree sitter repo map, automatic git commits, and Architect mode pairing a planner model with a cheaper editor model. OpenCode is the newer open source option supporting more than 75 providers with a clean modern terminal experience.
On the Agentic Index coding agent ranking, neither Aider nor OpenCode clears the bar, which asks for all five merge loop capabilities documented in full. Aider does not document integrations and tool calling in full; OpenCode documents two of the five in full. 2 of the 65 vendors in the lane clear it. See the coding agent ranking
This comparison is published by Agentic Index, an independent agentic AI vendor research platform. Aider and OpenCode are each graded against the same 14 capability Agentic Index taxonomy, from the vendor's own public materials under the Agentic Index verification standard, alongside 956 researched vendors. No vendor pays for placement and no vendor has reviewed this page. How this evidence is graded
Choose Aider if
- The repo map is the edge: structured codebase understanding without loading every file.
- Architect mode lets you split planning and editing across two models to cut session cost.
- Millions of installs and a public leaderboard give you a long track record.
Choose OpenCode if
- You want the newer terminal experience and its momentum in the open source community.
- More than 75 providers out of the box covers whichever model stack you run.
- Human oversight scored Full in our matrix, with approvals fitting cautious workflows.
| At a glance | Aider | OpenCode |
|---|---|---|
| Category | Coding agent | Coding agent |
| Entry price | Free / OSS | Free and open source with your own provider keys; OpenCode Go $10 a month or Go Plus $40 a month for curated open models; OpenCode Zen pay as you go per million tokens; Enterprise per seat through sales |
| Free / trial | Free (OSS self-host) | Free (OSS self-host) |
| Pricing confidence | public exact | public exact |
| Feature | A Aider |
O OpenCode |
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Partial
Aider works through git, lint and test commands, suggested shell commands, web scraping and image and voice input, with no MCP client or plugin system. |
Full / Explicit
Built in file, search and shell tools are extended by MCP servers, custom tools, plugins, formatters and LSP servers, with native GitHub and GitLab integrations. |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
Full / Explicit
Architect mode hands a change from a planning model to a separate editor model, and aider then lints, tests and tries to fix errors when a command fails. |
Full / Explicit
Plan then Build modes, parallel agents on one project, and configurable custom agents, commands and Agent Skills carry multi step work. |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
Partial
Work starts from the person through the terminal chat, a one shot --message flag or watch mode comments, with nothing on a schedule, webhook or repository event. |
Full / Explicit
GitHub pull_request, issues and cron schedule events start OpenCode without anyone invoking it, beside the TUI, CLI, desktop, IDE, HTTP server, ACP and GitLab. |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
Full / Explicit
A repository map ranks the repo's files and key symbols over a dependency graph to fit a token budget, with read only files and scraped pages as extra context. |
Partial
Context is assembled per run from file tools, @ references and LSP servers, and no maintained retrieval structure over the customer's code or documents is documented. |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
Partial
Chat history is saved to a file and can be reloaded on the next launch, with no stated lifetime or purge path. |
Partial
Sessions persist locally and can be resumed and shared, but no memory layer the agent writes and reads across sessions is documented. |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Full / Explicit | Full / Explicit |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
No / Not documented
Aider is a local CLI with no hosted service, accounts or organization layer, so no SSO, roles, audit logging or attestation is offered. |
Partial
Enterprise documents SSO through central config, an internal AI gateway, permissions and policies with no stored code or context, but no SOC 2, ISO or other attestation is published. |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Full / Explicit
Every AI edit is a git commit with a generated message that /diff shows and /undo reverts, and the session and full LLM conversation can be logged. |
Partial
Sessions can be shared as a link exposing the full conversation and the TUI shows tool calls, but no audit log, run history or organization level record is documented. |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Full / Explicit | Full / Explicit |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
Partial |
Partial
Agent Skills, custom agents, custom commands and plugins are shareable, but no vendor published catalog of prebuilt agents is documented. |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
Full / Explicit | Full / Explicit |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Partial
Aider can be scripted with --message or its Python Coder class, but the Python API is unsupported and no HTTP API, SDK or MCP server is offered. |
Full / Explicit |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
Full / Explicit
The repository ships a benchmark harness that measures pass rates, cost and timing for aider with a chosen model, and the project publishes its polyglot leaderboard from it. |
Partial
LSP diagnostics, test runs and /undo let the agent correct its own edits, but no evaluation harness, replay or regression testing of agent behavior is documented. |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented
Aider edits files, runs shell commands and scrapes web pages into markdown, but it does not drive a browser or operate software through a graphical interface. |
No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing | A Aider |
O OpenCode |
|---|---|---|
|
Entry price Lowest public entry point |
Free / OSS | Free and open source with your own provider keys; OpenCode Go $10 a month or Go Plus $40 a month for curated open models; OpenCode Zen pay as you go per million tokens; Enterprise per seat through sales |
|
Pricing confidence How public the numbers are |
Public, exact | Public, exact |
|
Billing Primary billing axis |
usage | hybrid |
|
Variable cost Workload / overage exposure |
Medium variable cost | Medium variable cost |
|
Free tier / trial Try before you buy |
Free tier
|
Free tier
|
|
Buying motion Self-serve vs sales call |
Self-serve | Self-serve |
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