Claude Haiku 3.5
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Claude 3.5 Haiku is a large language model by Anthropic. It was released on October 22, 2025 alongside Claude 3.6 Sonnet.
On most of Anthropic’s benchmarks, the model surpassed Claude 3 Opus.
Training
Pretraining data was collected up to July 2024.
Interpretability
- “On the Biology of a Large Language Model” (Lindsey et al, Mar 27, 2025)
- “Circuit Tracing: Revealing Computational Graphs in Language Models” (Ameisen et al, Mar 27, 2025)
- “When Models Manipulate Manifolds: The Geometry of a Counting Task” (Gurnee et al, Oct 21, 2025)