Haiku 5.5 launches with prompt-length pricing and migration changes
Haiku base rates depend on the 100K prompt threshold. Sonnet 5.5 cache reads fall to $0.10/M; eligible Max and Team API credits have separate claim and expiry rules.
By Benedict Felix · Updated 8 October 2026
What this changes for UK buyers
Task cost depends on prompt tokens, effort, output acceptance and credit boundaries; a lower rate is not a guaranteed workflow saving.
What buyers should do
Migrate one labelled queue, recount tokens and measure accepted-work cost with escalation and spending controls.
Primary announcement
Anthropic Haiku launch — 7 October 2026 ↗This is a dated source-linked buyer briefing. A vendor announcement does not prove UK account eligibility, an independent performance result or regulatory compliance. Open the primary source and confirm the exact plan before changing a production workflow.
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