Anthropic API launches Haiku 5.5 at $0.10/$0.50, halves Sonnet 5.5 cache reads
Haiku 5.5 added to Latest models: input $0.10 / output $0.50 per MTok (prompts >100K: $0.50 / $2.50), cache read $0.01 / write $0.125 (>100K: $0.05 / $0.625). Haiku 4.5 moved to Legacy models with prices unchanged ($1/$5, cache $0.10/$1.25).; Sonnet 5.5 prompt caching read price cut from $0.20 to $0.10 per MTok; cache write ($2.50), input ($2) and output ($10) unchanged.
What changed
Sonnet 5.5 prompt caching read price cut from $0.20 to $0.10 per MTok; cache write ($2.50), input ($2) and output ($10) unchanged.
Haiku 5.5 added to Latest models: input $0.10 / output $0.50 per MTok (prompts >100K: $0.50 / $2.50), cache read $0.01 / write $0.125 (>100K: $0.05 / $0.625). Haiku 4.5 moved to Legacy models with prices unchanged ($1/$5, cache $0.10/$1.25).
Before and after
Oct 5, 2026 vs Oct 8, 2026Sonnet 5.5 prompt caching read price cut from $0.20 to $0.10 per MTok; cache write ($2.50), input ($2) and output ($10) unchanged.
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