Introducing the Universal Managed Agents API.Read the announcement

OpenCode

The open-source terminal agent from SST — model-agnostic by design.

Operational

Harness BuilderOpen Source

Models on Brainbase

OpenCode ships no models of its own — that's the point. It runs any platform-billed model, selected per task: Claude, GPT, Gemini, Grok, Kimi, GLM, DeepSeek, and more.

Harnesses by OpenCode

Agent runtimes built by this vendor, managed end-to-end on Brainbase.

Platform-billed

OpenCode

opencode

The open-source terminal agent from SST. Model-agnostic by design — swap models per task without changing the agent, and the home of Auto model routing.

Model delivery · Any platform model, per task

About

OpenCode is the open-source coding agent from the SST team, built to be provider-neutral: one agent surface, any model behind it.

On Brainbase, OpenCode runs as a managed harness with platform billing — swap between frontier and open-weight models per task without changing anything else about your agent.

Try it on Brainbase

One API call boots a managed sandbox on the opencode harness pointed at claude-sonnet-5. Hosting, scaling, and billing are handled for you.

curl -X POST https://api.brainbaselabs.com/v2/agents \
  -H "Authorization: Bearer $BRAINBASE_API_KEY" \
  -d '{
    "title": "my-agent",
    "runtime_kind": "opencode",
    "default_model": "claude-sonnet-5"
  }'

runtime_kind/opencodemodel/claude-sonnet-5