ChatGPT vs OpenCode: Side-by-Side Comparison 2026
ChatGPT vs OpenCode comparison 2026. Side-by-side features, pricing & capabilities.
ChatGPT is an AI assistant from OpenAI — ai assistant with powerful coding capabilities. OpenCode is a CLI-based coding agent from SST — open-source terminal ai coding agent.
ChatGPT
ChatGPT — Conversational AI from OpenAI. General + Coding.
- ✓ AI chat
- ✓ Test generation
- ✓ Debugging
- ✓ Code review
Free / $8/mo · 6 plans
OpenCode
Open-source terminal AI coding agent from SST. Free with BYOK, or use OpenCode Zen (pay-per-token) and Black (flat-rate subscription at $20/$100/$200/mo) for managed model access.
- ✓ AI chat
- ✓ Agentic mode
- ✓ Multi-file editing
- ✓ Terminal commands
- ✓ Test generation
Free · 2 plans
| Feature | ChatGPT | OpenCode |
|---|---|---|
| Category | Assistant | CLI |
| Starting Price | Free | Free |
| Model Family | GPT / o-series | Multi-model (any) |
| Agentic Mode | — | ✓ |
| Multi-File Editing | — | ✓ |
| Terminal Commands | — | ✓ |
| Documentation | ✓ | — |
| Voice Input | ✓ | — |
| Open Source | No | Yes (MIT) |
Pricing verified Feb 25, 2026. ChatGPT pricing | OpenCode pricing
Key Differences
- Category: ChatGPT is an AI assistant; OpenCode is a CLI-based coding agent.
- Starting price: ChatGPT starts at $8/mo; OpenCode starts at free / BYOK.
- Model family: ChatGPT uses GPT / o-series; OpenCode uses Multi-model (any).
- Agentic mode: OpenCode supports agentic mode; ChatGPT does not.
- Open source: ChatGPT: No. OpenCode: Yes (MIT).
- Bring your own key: OpenCode supports BYOK; ChatGPT does not.
- Platforms: ChatGPT runs on Android, Web, Windows, iOS, macOS; OpenCode runs on Linux, Windows, macOS.
- Provider: ChatGPT is built by OpenAI; OpenCode is built by SST.
- Capabilities: OpenCode has multi-file editing; OpenCode has terminal commands; ChatGPT has voice input.
Which Should You Choose?
Choose ChatGPT if you want AI-powered coding assistance. Choose OpenCode if you want open-source terminal-based coding with model flexibility. Read our full reviews to see which fits your workflow.