Claude Sonnet 4

Published

May 22, 2025

Claude Sonnet 4 is an AI model developed by Anthropic (United States), first published in May 2025. It works in the language, multimodal and vision domain, on tasks such as code generation, language modeling/generation, quantitative reasoning and 15 more.

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, Multimodal, Vision
Task: Code generation, Language modeling/generation, Quantitative reasoning, Search, Visual question answering, Translation, Image captioning, Instruction interpretation, Mathematical reasoning, Visual puzzles, Code autocompletion, Chat, Character recognition (OCR), Language modeling, Language generation, Text autocompletion, Retrieval-augmented generation, System control
Model accessibility: API access
Open weights: No

Benchmark results

01

Epoch Capabilities Index

ECI Score

142.2