Models & Research · Latent.Space

Anthropic launches Claude Haiku 5.5 as a cheaper, faster small model

Anthropic announced Claude Haiku 5.5 on October 7, 2026, positioning it as the company’s cheapest, fastest, and most capable small model so far. The model is aimed at high-volume, cost-sensitive work such as summaries, classification, compaction, and subagent tasks in coding workflows. Anthropic also says Haiku 5.5 is available now across its own platform and major cloud providers. In its launch post, the company reports benchmark gains over Haiku 4.5 and says the new model includes an adjustable effort setting. Anthropic additionally says it cut Sonnet 5.5 cache-read pricing and introduced new monthly API credits for Max and Team subscribers. These are Anthropic’s product and performance claims, not independently verified measurements.

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Originally published 10/10/2026, 10:07:17 PM