anthropic

Claude Opus 4.1

text-to-text
Excels at complex coding, autonomous research, and agent workflows, with advanced reasoning and a 200,000-token context for deep analysis and synthesis.

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anthropicClaude Opus 4.1

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Settings

Advanced settings to control the behavior of the model.

A system prompt that will be prepended to all chat messages to guide the model's behavior. Automatically gets saved to your playground repository.

Controls randomness: 0 = deterministic, 2 = very creative

Maximum length of the response (1-128000 tokens)