Anthropic (Claude)

Claude models run through the built-in anthropic provider.

Setup

1. Create an API key in the Anthropic Console.
2. Store it as a repo/org secret named ANTHROPIC_API_KEY and pass it in the workflow env:.
3. Select a Claude model and allowlist the provider in .crabd.yml.

.crabd.yml

model: anthropic/claude-sonnet-4-6
providers:
  allowlist: [anthropic]

workflow

- uses: louisescher/crabd@v0
  with:
    model: anthropic/claude-sonnet-4-6
  env:
    ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}

Model specifiers

Use anthropic/<model>, for example:

• anthropic/claude-opus-4-8: most capable, for hard implementation work.
• anthropic/claude-sonnet-5: balanced default.
• anthropic/claude-haiku-4-5: fastest/cheapest, good for triage and light review.

Tips

• Set a per-mode model to spend more only where it matters, e.g. Opus for implement, Haiku for review:

  .crabd.yml

  model: anthropic/claude-haiku-4-5
  modes:
    implement:
      model: anthropic/claude-opus-4-6

• thinking_level (e.g. high) increases reasoning effort for Claude models that support it.