Claude Haiku 5.5 slashes prices up to 90% and rewrites agent economics
Anthropic released Claude Haiku 5.5 with an aggressive price cut: average cost drops up to 90% versus Haiku 4.5, alongside cache discounts on Sonnet 5.5 and monthly API credits for Max and Team plans.
The technical leap is real. On OSWorld, which measures a model's ability to operate a computer, it jumps from 15.7% to 72.4%. That moves Haiku out of the cheap but limited tier and into territory where agents are genuinely usable in production.
The catch is the new tokenizer, which burns more tokens per task, so part of the savings erodes. Price per token falls hard, cost per finished job falls less. It mirrors OpenAI's GPT-6 play, where the gap between base and frontier models ranges from five to a hundred times.
For anyone building business automation, the math changes. Model choice stops being a benchmark decision and becomes a cost-per-completed-task decision.
Fabrizio's Analysis:
I looked at the Claude Haiku 5.5 numbers and my first thought was that the price war just entered its brutal phase.
That 72.4% on OSWorld is the number that matters. It means agents that click, navigate, and finish tasks on real interfaces at a cost that was unthinkable yesterday. If it holds in production, my whole automation stack reorganizes around Haiku, with the big models reserved for heavy reasoning.
Watch the tokenizer. Savings per token are real, savings per task are smaller. I made that mistake before and paid the bill at the end of the month. I always measure cost per useful output, never the list price.
Anthropic's move is obvious: compress competitors' margins and own the tier where the volume lives. For those of us who build, it's a golden window, as long as it lasts.
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