Claude Sonnet 4.5
Premium Legacy Zero Data Retentionby Anthropic Claude
Details
Previous-generation Sonnet with long context and extended thinking
Context window
1M tokens
Max output
64K tokens
Knowledge cutoff
January 2025
Provider
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Anthropic Claude
Pricing
Premium
PDF support
Yes
Zero Data Retention
Yes
Added
May 22, 2025
Replaced
September 1, 2025
Features
Extended thinking
Enabled (10K budget)