Count tokens in a Message changedapi/messages/count_tokens
Nearest release: v2.1.322, published 2 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+8added
Lines−0removed
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1,091
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits23to this page, all time
The whole hunk
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10911091
10921092 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
10931093
1094 - `"claude-fable-5-2"`
1095
1096 Built for the most ambitious work in coding, enterprise workflows, and the sciences
1097
1098 - `"claude-mythos-5-2"`
1099
1100 Built for the most demanding cybersecurity and life sciences research, available through verification programs
1101
10941102 - `"claude-haiku-5-5"`
10951103
10961104 Fastest model for high-volume, real-time tasks
No line in this hunk matches that.