Claude Haiku 4.5

Published

Oct 15, 2025

Claude Haiku 4.5 is an AI model developed by Anthropic (United States), first published in October 2025. It works in the language domain, on tasks such as chat, code generation, language modeling/generation and question answering.

Epoch AI has no training-compute estimate for this model.

Access: API access. Its weights are not openly released.

Full record

Organization: Anthropic
Country of organization: United States
Domain: Language
Task: Chat, Code generation, Language modeling/generation, Question answering
Model accessibility: API access
Open weights: No

Benchmark results

01

Epoch Capabilities Index

ECI Score

142.9