Streaming not working with Hono Node Server #4154

app.post("/ai", async (c) => {
  const body = await c.req.json();
  const messages = body.messages || [];

  const result = streamText({
    model: openai("o3-mini"),
    messages,
  });

  for await (const chunk of result.toDataStream()) {
    console.log(chunk);
  }

  c.header("X-Vercel-AI-Data-Stream", "v1");
  c.header("Content-Type", "text/plain; charset=utf-8");

  return stream(c, (stream) => stream.pipe(result.toDataStream()));
});