Claude Sonnet 4.5

Release Date: Sep 29, 2025     Creator: Anthropic

Claude Sonnet 4.5 is a high-intelligence model built for complex agents and serious coding work. Strong at multi-step reasoning, planning, and tool-driven tasks.

Model Specifications
Knowledge Cutoff
Jan 2025
Context (VividLLM)
128,000 Tokens
With a context window of 128,000 tokens, this model can 'remember' and analyze up to 192 pages of data at once. This makes it a top choice for debugging entire codebases and summarizing full-length books.
Context (Native)
1,000,000 Tokens
Input ModalitiesTextImagePDF
Output TypeText
Max Output8192
Input Weight
2.00 x (Pro)
Output Weight
1.49 x (Pro)
Industry Benchmarks
Intelligence Index (Artificial Analysis) N/A
Coding Index (Artificial Analysis)N/A
Math Index (Artificial Analysis)N/A
Response Speed
Output Tokens per second N/A
Median Time to First Token SecondsN/A
Launch VividLLM Now => :

Benchmarks accessed via : Artificial Analysis

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