No longer supported

This model is legacy (released July 2023) and is no longer actively maintained or recommended by Anthropic. Consider using their current flagship model instead.

legacylegacyllm Proprietary

Claude 2 (Legacy)

by Anthropic· Released July 2023· Cutoff Early 2023

Claude 2 is Anthropic's predecessor to Claude 3, offering strong performance on a wide range of tasks including reasoning, coding, and analysis. It features a 100K token context window and improved safety compared to earlier versions. Now superseded by the Claude 3 family, it remains available for legacy use cases.

Official Site API Docs

Input cost

$8.00 per 1M tokens

Output cost

$24.00 per 1M tokens

Context window

100K tokens

Max output

4096 tokens

Modalities

text

License

proprietary

Capabilities

Text GenerationCode GenerationReasoningAnalysisSummarizationQuestion AnsweringCreative Writing

Best For

Legacy applications requiring a large context window and strong general-purpose language understanding.

Strengths

Large 100K token context window
Strong reasoning and analytical capabilities
Improved safety and helpfulness over Claude 1

Limitations

No vision or multimodal support
Slower inference compared to Claude 3 models
Higher cost per token than newer models
Legacy status may lead to deprecation

Use Cases

Document analysis and summarization

Code generation and debugging

Long-form content creation

Complex reasoning tasks

Customer support chatbots

Data extraction from large texts

Educational tutoring

Improvements Over Previous Model

Context window increased from 9K to 100K tokens compared to Claude 1.3
Improved performance on coding benchmarks (e.g., HumanEval 71.2% vs 56%)
Reduced harmful outputs through enhanced safety training
Better factual accuracy and reduced hallucination rates
Introduced ability to upload files (PDF, TXT, CSV) for analysis

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