import anthropicclient = anthropic.Anthropic()response = client.messages.count_tokens( model="claude-3-7-sonnet-20250219", tools=[{"name":"get_weather","description":"Get the current weather in a given location","input_schema":{"type":"object","properties":{"location":{"type":"string","description":"The city and state, e.g. San Francisco, CA",}},"required":["location"],},}], messages=[{"role":"user","content":"What's the weather like in San Francisco?"}])print(response.json())
curl https://api.anthropic.com/v1/messages/count_tokens \--header"x-api-key: $ANTHROPIC_API_KEY"\--header"content-type: application/json"\--header"anthropic-version: 2023-06-01"\--data '{"model":"claude-3-7-sonnet-20250219","thinking":{"type":"enabled","budget_tokens":16000},"messages":[{"role":"user","content":"Are there an infinite number of prime numbers such that n mod 4 == 3?"},{"role":"assistant","content":[{"type":"thinking","thinking":"This is a nice number theory question. Lets think about it step by step...","signature":"EuYBCkQYAiJAgCs1le6/Pol5Z4/JMomVOouGrWdhYNsH3ukzUECbB6iWrSQtsQuRHJID6lWV..."},{"type":"text","text":"Yes, there are infinitely many prime numbers p such that p mod 4 = 3..."}]},{"role":"user","content":"Can you write a formal proof?"}]}'