Claude 1.3

anthropic

The final Claude 1 release, introducing the breakthrough 100K token context window. Claude 1.3 offered significantly improved long-document understanding and reasoning over earlier versions. This model has been retired and is no longer available for use.

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Example Use Cases

Long document analysis on a budget

Basic reasoning over large inputs

Simple text-heavy workflow

Technical Specifications

Context Window

100,000 tokens

Max Output

4,096 tokens

Cache Miss Cost

$8 per 1M tokens

Non-Reasoning Cost

$24 per 1M tokens

Web Search Cost

$15 per 1K calls

Code Execution Cost

$0.19 per 1K calls

⚠️ Legacy

Made legacy on

Reason

Retired model

Recommended Replacement

Claude Haiku 4.5