OpenCode Review: Transparent coding agent

Overview

OpenCode is an open-source terminal coding agent designed around one principle: transparency. Unlike Claude Code or Codex CLI, which abstract away the agent loop, OpenCode shows you everything. Every prompt it sends to the model, every response it receives, every file it reads, every command it runs — all visible, all auditable.

This transparency isn't just philosophical — it's practical. When OpenCode makes a mistake (and all AI tools do), you can trace exactly why. You can see which file it misread, which assumption it made, which step in its reasoning went wrong. This makes OpenCode uniquely valuable for learning how AI coding agents work and for debugging their failures.

OpenCode is also provider-agnostic. It works with OpenAI, Anthropic, Google, OpenRouter, and local models. You're never locked into a single AI provider.

Key features

• Full transparency — every prompt, response, file read, and command is visible and logged
• Provider-agnostic — works with OpenAI, Anthropic, Google, OpenRouter, Ollama, and more
• Open source — full source available, community-driven
• Terminal-native — runs in your terminal, integrates with your shell workflow
• Multi-file editing — can create, modify, and delete files across your project
• Shell command execution — runs tests, linters, builds as part of its workflow
• Configurable prompts — customize the system prompt and agent behavior
• Session logging — every session is recorded for review and debugging

How it fits your workflow

OpenCode follows a transparent, step-by-step workflow:

1. Describe your task — from the terminal: tell OpenCode what you want to accomplish
2. Watch it work — OpenCode shows you every step: which files it's reading, what it's sending to the model, what the model responds with, what commands it's running
3. Intervene if needed — because you can see everything, you can stop OpenCode mid-task if it's going in the wrong direction
4. Review the output — OpenCode presents a diff of all changes. You review and accept or reject.
5. Learn from the logs — every session is logged. Review past sessions to understand how OpenCode thinks and where it struggles.

This is the most educational AI coding workflow. If you want to understand how AI agents work — not just use them — OpenCode is the best teacher.

Pricing

OpenCode itself is free and open source. You pay for the model you use:

• Free with local models — run Llama, Qwen, or DeepSeek via Ollama at zero cost
• API-based models — standard API pricing from your chosen provider
• Typical costs — similar to Aider and Codex CLI: $0.50-3 per session with GPT-4o or Claude, under $0.10 with cheaper models

No subscription, no seat license, no vendor lock-in.

Strengths

• Maximum transparency — see everything the AI does and why
• Educational value — best tool for understanding how AI coding agents work
• Provider flexibility — not locked into any AI vendor
• Open source — community-driven, inspectable, forkable
• Session logging — review past sessions to improve your prompts
• Intervention-friendly — stop and redirect mid-task when needed

Limitations

• Less polished than Claude Code — rougher UX, fewer convenience features
• Verbose output — seeing every step means a lot of terminal output to parse
• Slower than opaque agents — transparency adds overhead
• Smaller community — fewer users, less documentation, slower development
• No IDE integration — terminal-only, no inline editing or chat sidebar
• Requires more engagement — you need to pay attention to what it's doing

Who it's for

OpenCode is for developers who want to understand their AI tools, not just use them. If you're curious about how AI coding agents work, want to debug their failures, or need full auditability for compliance reasons, OpenCode is the best choice. It's also great for learning — watching OpenCode work teaches you about prompt engineering, agent design, and AI limitations. It's less ideal if you just want to get work done quickly — Claude Code or Cursor will be faster.

Verdict

OpenCode is the most transparent AI coding agent available. It won't be the fastest or the most polished, but it will be the most understandable. For developers who value knowing what their tools are doing — and for anyone who wants to learn how AI agents work — OpenCode is invaluable. Use it alongside a faster tool like Claude Code: OpenCode for understanding, Claude Code for speed.