Count tokens in a Message changedapi/beta/messages/count_tokens
Recorded here
Lines+1added
Lines−1removed
From line
4,050
where the diff opens
First seen
14 Aug 2026
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Recorded edits25to this page, all time
The whole hunk
from line 4050, old and new numbered
/
from line 4050
40504050 "role": "user"
40514051 }
40524052 ],
4053 "model": "claude-opus-5",
4053 "model": "claude-opus-5-5",
40544054 "system": [
40554055 {
40564056 "text": "Today'\''s date is 2024-06-01.",
No line in this hunk matches that.