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docs(readme): mention new token counting endpoint #728

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Nov 4, 2024
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docs(readme): mention new token counting endpoint #728

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14 changes: 13 additions & 1 deletion README.md
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Expand Up @@ -165,7 +165,19 @@ Alternatively, you can use `client.messages.create(..., stream=True)` which only

## Token counting

You can see the exact usage for a given request through the `usage` response property, e.g.
To get the token count for a message without creating it you can use the `client.beta.messages.count_tokens()` method. This takes the same `messages` list as the `.create()` method.

```py
count = client.beta.messages.count_tokens(
model="claude-3-5-sonnet-20241022",
messages=[
{"role": "user", "content": "Hello, world"}
]
)
count.input_tokens # 10
```

You can also see the exact usage for a given request through the `usage` response property, e.g.

```py
message = client.messages.create(...)
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