Claude Code

Claude Code uses the Messages API. zro launch starts it with a session-scoped provider configuration and leaves your normal Claude Code config untouched.

zro launch claude --model deepseek-v4.1-flash

Switch models during a session with /model inside Claude Code.

Overriding the Anthropic model

Claude Code refers to models by tier aliases: opus, sonnet, fable, and haiku (used for cheap background tasks). zro launch maps each alias to a Zro model automatically. Override any slot with a repeatable --alias flag:

zro launch claude --model deepseek-v4.1-flash \
  --alias sonnet=glm-5.3 \
  --alias haiku=glm-5.3-flash

Slot names are case-insensitive. Use any model ID from Models.

Manual configuration

Claude Code reads the endpoint root (without /v1):

export ANTHROPIC_BASE_URL="https://zro.moonmath.ai"
export ANTHROPIC_AUTH_TOKEN="sk-..."
export ANTHROPIC_MODEL="deepseek-v4.1-flash"

Use any model ID from Models.

To override a tier alias directly, set the matching ANTHROPIC_DEFAULT_<SLOT>_MODEL variable (OPUS, SONNET, FABLE, or HAIKU):

export ANTHROPIC_DEFAULT_OPUS_MODEL="glm-5.3"
export ANTHROPIC_DEFAULT_HAIKU_MODEL="glm-5.3-flash"