Opencode With CBorg

Opencode.AI is a free open source CLI coding agent.

Installation

To use the CBorg API, you must install Opencode from source to enable LiteLLM provider support.

As of 2026-04-22: The official Opencode release does not yet support LiteLLM-style providers (required for the CBorg configuration below). Until PR #14468 is merged, you need to build from that branch:

git clone https://github.com/anomalyco/opencode.git /tmp/opencode-build \
  && cd /tmp/opencode-build \
  && git fetch origin pull/14468/head:pr-14468 \
  && git checkout pr-14468 \
  && bun install \
  && cd packages/opencode \
  && bun run build --single \
  && ARCH="$(uname -m)" \
  && case "$ARCH" in \
       x86_64)  OPENCODE_ARCH="x64" ;; \
       aarch64) OPENCODE_ARCH="arm64" ;; \
       *) echo "Unsupported arch: $ARCH" && exit 1 ;; \
     esac \
  && cp "dist/opencode-linux-${OPENCODE_ARCH}/bin/opencode" /usr/local/bin/opencode \
  && chmod +x /usr/local/bin/opencode \
  && rm -rf /tmp/opencode-build

Note: This requires Bun to be installed. Once PR #14468 is merged into the official Opencode release, you will be able to install Opencode normally and use the configuration below directly.

Configuration

Save your CBorg API key to the environment and configure the CBorg API provider in ~/.config/opencode/opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "enabled_providers": ["litellm"],
  "model": "litellm/cborg-coder",
  "provider": {
    "litellm": {
      "name": "CBorg API",
      "options": {
        "baseURL": "https://api.cborg.lbl.gov/v1",
        "apiKey": "{env:CBORG_API_KEY}"
      },
      "models": {
        "cborg-coder": {
          "name": "CBorg Coder (Free)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        },
        "gemini-flash": {
          "name": "Gemini Flash ($)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        },
        "gpt-codex": {
          "name": "GPT Codex ($$)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        },
        "claude-sonnet": {
          "name": "Claude Sonnet ($$)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        },
        "claude-opus": {
          "name": "Claude Opus ($$$)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        },
        "gemini-pro-high": {
          "name": "Gemini Pro ($$$)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        },
        "claude-opus-high": {
          "name": "Claude Opus High ($$$$)",
          "textVerbosity": "low",
          "reasoningSummary": "off"
        }
      }
    }
  },
  "mcp": {
    "context7": {
      "type": "remote",
      "url": "https://api.cborg.lbl.gov/mcp/context7",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:CBORG_API_KEY}"
      }
    }
  },
  "tools": {
    "*": true
  }
}

Other models can be also used by adding similar entries under “models”.