Claude Code (CLI)

Claude Code is the official CLI agent. To route it through ethereal, set an Anthropic-compatible base URL and your key.

export ANTHROPIC_BASE_URL="https://api.ethereal.llc"
export ANTHROPIC_API_KEY="eth-..."

claude

To avoid exporting them every time, add the lines to ~/.zshrc / ~/.bashrc.

Choosing a model

claude --model claude-sonnet-4-6
# or inside a session: /model claude-opus-4-8

For everyday work, keep claude-sonnet-4-6, switch to claude-opus-4-8 for complex tasks, and to claude-haiku-4-5 where you need speed/low cost.

Charges follow the model’s rate for the actual tokens of the session. See your balance and breakdown in your dashboard.