OpenCode
The category leader: 75+ providers, LSP integration, large plugin surface. TypeScript/Bun runtime makes it one of the heavier harnesses to run. Development is perceived as closed-off by parts of its community.
| GitHub stars | 209K (updated September 2026) |
|---|---|
| Language | TypeScript |
| License | MIT |
| Bring your own key | Yes |
| Pricing | Free, open source; bring your own provider or subscription logins |
| Footprint | n/a |
| Sandbox | n/a |
| Tokens on our 10-task suite | 10.0M (resolved 9/10) |
Repository: anomalyco/opencode
On our benchmark suite
10-task SWE-bench Verified subset, five agents through the same LiteLLM proxy on Z.ai GLM-5.3, same provider, 600 s per-task cap, vanilla configs. OpenCode measured 10.0M tokens, resolving 9/10 of tasks. Methodology and per-task data: full report.