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Anthropic's new Claude Haiku 5.5 offers a competitive price point against OpenAI's GPT-6 Luna for workloads under 100k tokens but introduces a less efficient tokenizer that effectively raises costs for longer contexts. The model also enforces reasoning activation by default, which significantly increases latency and expense for complex tasks compared to previous iterations or competitors with more flexible pricing tiers.

Sources coveringSimon Willison, LessWrong, Latent Space, Databricks

What this isA model's reading of the article and related coverage, written for aiqbench. Not the publisher's words.

Claude Haiku 5.5

Simon WillisonOctober 7, 20263 min read

As previously promised, here’s Anthropic’s new fast, low cost model: Introducing Claude Haiku 5.5. The previous Haiku, 4.5, was very much showing its age. It came out almost a year ago, and was priced at $1/million input and $5/million output—relatively expensive even back then, and a full 10x the price of OpenAI’s GPT-6 Luna, released last month.…

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