From playground to product

APIs turn a chat model into a building block you can wire into apps. The shape is the same across providers: send messages, get a completion.

from anthropic import Anthropic
client = Anthropic()
resp = client.messages.create(
    model="claude-sonnet-4-5",
    max_tokens=500,
    messages=[{"role":"user","content":"Summarize this ticket: ..."}],
)
print(resp.content[0].text)

What you'll build

• A chatbot with conversation history.
• A copilot that drafts or classifies inside a workflow.
• Streaming responses for a snappy UX.
• Tool use so the model can call your functions.

Takeaway: once you can call the API and handle the response, you can build almost anything.