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Boris Cherny (@bcherny): Haiku 5.5 is a good Haiku. With 100k token context, it's also 10x cheaper than Haiku 4.5 https://t.co/Vzkq0AIQQz

L3 · BuilderModels & Releases@bcherny· 10/7/2026

Directly impacts cost-benefit calculations for developers and builders using Claude API for their applications.

AI Summary

Claude Haiku 5.5 released with 100k context, costing 75% less than Haiku 4.5 and positioned as Anthropic's cheapest, fastest small model.

Excerpt

Haiku 5.5 is a good Haiku. With 100k token context, it's also 10x cheaper than Haiku 4.5 https://t.co/Vzkq0AIQQz

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Alex Albert (@alexalbert__): For reference, Haiku 4.5 came out on October 15th, 2025 so these two columns are less than a year apart. and oh yeah Haiku 5.5 is also much faster and 75% cheaper... https://t.co/1Zt19kdTYC

Anthropic's Haiku 5.5 is much faster, 75% cheaper, and shows significant performance improvements over Haiku 4.5 released less than a year ago.