anthropic

Overview ¶

This sample demonstrates the Anthropic plugin, which speaks Anthropic's native Messages API: a streaming flow that generates a joke with a model pinned through anthropic.ModelRef and the Anthropic SDK's own request type as its config.

compat_oai/anthropic reaches the same Claude models through the OpenAI-compatible endpoint instead. What differs is the response: this plugin returns Claude's thinking as Genkit reasoning parts with their signatures preserved, while the compatible endpoint keeps the thinking server-side.

Run it:

export ANTHROPIC_API_KEY=...
go run .

Or with the Dev UI, to call the flow from a browser and read a trace of every run at http://localhost:4000/traces:

curl -sL cli.genkit.dev | bash    # install the Genkit CLI, once
genkit start -- go run .

Or over HTTP. Streaming needs ?stream=true:

curl -N -X POST 'http://localhost:8080/jokesFlow?stream=true' \
  -H "Content-Type: application/json" \
  -d '{"data": {"topic": "bananas"}}'