Anthropic 发布 Claude Haiku 5.5，定价对齐 GPT-6 Luna
Introducing Claude Haiku 5.5
Anthropic 发布快速低价模型 Claude Haiku 5.5，定价为每百万 token 输入 $0.10、输出 $0.50，与 OpenAI 上月发布的 GPT-6 Luna 一致，但超过 100,000 token 后涨至 $0.50/$2.50，而 Luna 在 272,000 token 后才涨到 $0.20/$0.75。Simon Willison 实测发现 Haiku 5.5 使用了更不宽松的 tokenizer，同一长提示词消耗的 token 约为 Haiku 4.5 的 1.25 倍，构成隐性涨价；新模型不支持关闭推理，默认 medium 档。Anthropic 同时宣布将 Sonnet 5.5 的缓存读取价格减半，并为订阅计划增加 API 额度。
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作者实测了 Haiku 5.5 的定价、tokenizer 变化与推理档位表现，读者可据此判断它与 GPT-6 Luna 的成本取舍。
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Introducing Claude Haiku 5.5
7th October 2026
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.
The new Haiku exactly matches the price of GPT-6 Luna—$0.10/$0.50—up to 100,000 tokens. Beyond 100,000 tokens the price increases 5x to $0.50/$2.50. Luna itself has a price increase at 272,000 tokens but only to $0.20/$0.75.
Haiku 5.5 also uses a new, less generous tokenizer. My Claude Token Counter tool shows that the same long prompt uses around 1.25x as many tokens with Haiku 5.5 compared to Haiku 4.5, so there’s a hidden price increase there.
If your workloads fit in 100,000 tokens, Haiku is the same price as Luna and reports higher benchmark scores. Above 100,000 tokens, Luna looks like a much better deal.
The most recent release of llm-anthropic finally fixed it so I don’t need to ship a new version of that plugin for every new model. I tested the new model like this:
Pelicans
Here are pelicans for low, medium, high, xhigh, and max. The new Haiku doesn’t let you disable reasoning, and defaults to medium. I got a good bicycle frame for everything beyond low. The low effort pelican cost 0.0936 cents and took 7 seconds.
This max effort pelican took 5 minutes 9 seconds to generate, but still only cost me 3.3826 cents:
For comparison, here’s the pelican I got a year ago from Haiku 4.5. It sucked at drawing pelicans:
In addition to Haiku 5.5, Anthropic announced today that they are halving the price of cache reads for Sonnet 5.5. They’ve also added API credits to subscription plans:
Claiming this is pleasantly easy: navigate to Settings -> Billing and select the API organization that should benefit from the credits every month:
OpenAI still allow you to use your Codex subscription for personal API use, which works out as a better deal for heavy API users. This new credit scheme goes at least some way to overcoming that difference.
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We're going to need default hard budget caps on pretty much everything - 3rd October 2026; OpenAI DevDay 2026 live blog - 29th September 2026
This is Introducing Claude Haiku 5.5 by Simon Willison, posted on 7th October 2026.
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