1. Set the following variables in your environment:

 
# set authorization and base URL
export ANTHROPIC_AUTH_TOKEN=$CBORG_API_KEY
export ANTHROPIC_BASE_URL=https://api.cborg.lbl.gov

# set fast model; alternative=anthropic/claude-sonnet (more expensive)
export ANTHROPIC_SMALL_FAST_MODEL=anthropic/claude-haiku

# set main model; alternative=anthropic/claude-opus (more expensive)
export ANTHROPIC_MODEL=anthropic/claude-sonnet

# recommended setting
export DISABLE_NON_ESSENTIAL_MODEL_CALLS=1

# recommended setting
export DISABLE_TELEMETRY=1

# recommended setting to reduce model throttling
# however, can be set up to 64000 tokens
# recommended to set to a reasonable limit
export CLAUDE_CODE_MAX_OUTPUT_TOKENS=8192

2. Restart your shell and verify that the environment variables are now present.

env | grep ANTHROPIC

3. Now start Claude Code in your project directory.

cd my-project
claude

4. Optional: Install VS Code Extension

If you are a VS Code user, install “Claude Code for VSCode” extension. When claude is run through the VS Code terminal, it will use VS Code to display highlighted diffs for approval.

Additional Notes

Note: It is strongly recommended to use version control (e.g. Git) with Claude Code projects.

Note: It is recommended to use Claude Code with the official Anthropic models as shown in the above configuration. However, Claude Code may also work with non-Anthropic models via CBorg API.

Budget Issues: Heavy use of Claude Code may quickly exhaust your API usage credits. Direct access to Claude models can be configured via a GCP or AWS cloud project. To get started, please contact Science IT Consulting with a PID to use for recharges and we will help you get setup with a cloud project.