OpenCode
OpenCode is an open-source coding agent you can run in a terminal, desktop app or IDE extension while pointing it at local or hosted models. Developers who already pay for ChatGPT or GitHub Copilot can connect those subscriptions, spin up parallel agent sessions and share session links when collaborating. Optional OpenCode Go subscriptions and Zen pay-as-you-go balances exist for people who want curated model access without managing every provider key themselves. The core agent remains free and open source; paid layers are about model routing and quota convenience. Limitation: free models and BYO keys still incur provider costs outside OpenCode, and Go/Zen fees apply if you rely on their hosted catalogs. Treat agent patches like any Junior engineer work—tests and review remain mandatory.
Key features
- Open-source coding agent for terminal, desktop and IDE
- Bring your own models or connect existing Copilot/ChatGPT access
- Optional Go subscriptions and Zen pay-as-you-go model access
Limitations
The agent binary is free, but model tokens are not—either bring your own paid keys or use OpenCode Go/Zen paid model access; free model options are limited.
Links
Pricing
Price checked: 2026-10-18. Source: official pricing page.
Free plan: Yes (Open-source agent is free; some free models included; bring your own API keys or existing ChatGPT/Copilot subscriptions)
| Plan | Monthly | Annual (per month) | Billing unit | Notes | Source |
|---|---|---|---|---|---|
| Go | $10 | Not listed | flat | Curated open-source coding models with generous usage limits | Source Price checked: 2026-10-18 |
| Go Plus | $40 | Not listed | flat | Higher limits than Go | Source Price checked: 2026-10-18 |
| Zen (pay as you go) | Not listed | Not listed | usage | Prepaid balance: $20 top-up (+$1.23 card processing fee); per-request pricing; auto top-up at $5 | Source Price checked: 2026-10-18 |
"Not listed" means the official page shows no list price for that billing period (often contact sales). We never fill gaps from third-party sites.