ChatGPT vs OpenCode: Side-by-Side Comparison 2026
ChatGPT vs OpenCode comparison for 2026. Features, pricing, AI capabilities, and editor support analyzed side by side to help you choose the right coding tool for your workflow.
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 · 7 plans
OpenCode
Open-source terminal AI coding agent from SST. Free with BYOK, or use Go ($10/mo for curated open-source models), Zen (pay-per-token), or Black (flat-rate subscription at $20/$100/$200/mo, currently paused) for managed model access.
- ✓ AI chat
- ✓ Agentic mode
- ✓ Multi-file editing
- ✓ Terminal commands
- ✓ Test generation
Free / $10/mo · 4 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 May 4, 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 $10/mo.
- 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.