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Anthropic smoke test

Make two live Anthropic requests, one streamed and one decoded into a typed object.

The example uses streamText for incremental output, then calls generateObject[Answer] with the same model. Set ANTHROPIC_API_KEY before running it and expect both requests to use your Anthropic account.

import std/os
import nimgent
import nimgent/providers/anthropic


type Answer = object
  answer: string
  confidence: int


let model = anthropic(getEnv("ANTHROPIC_API_KEY")).model("claude-sonnet-4-6")


echo "streaming..."
let streamed = streamText(model,
  prompt = "Explain why the sky is blue in one sentence.",
  maxTokens = 1024,
  onEvent = proc (ev: StreamEvent): bool =
    if ev.kind == seTextDelta:
      stdout.write ev.text
      flushFile(stdout)
    true)
echo "\nfinish: ", streamed.finishReason


let structured = generateObject[Answer](model,
  prompt = "Return a one-word answer and an integer confidence from 0 to 100.",
  maxTokens = 1024)
echo "answer: ", structured.value.answer
echo "confidence: ", structured.value.confidence

Run it from the repository root:

Terminal window
ANTHROPIC_API_KEY=... nim c -r examples/anthropic_smoke.nim

View the source example