Claude Sonnet 4 (retired) pricing observed change: $3/1M in, $15/1M out, $3.75/1M cached → $3/1M in, $3/1M out, $6/1M cached.
The change
What changed
Before: $3/1M in, $15/1M out, $3.75/1M cached
↓
After: $3/1M in, $3/1M out, $6/1M cached
Evidence
Verbatim from source
"Claude Sonnet 4.6 and earlier models use the previous tokenizer."
Trust signals
How we verified this
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Pricing verification
Verification method
🕐
5d ago
Last reconciled
🔗
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Primary citation
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