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Frontier Lab · Americas

Anthropic

Claude, safety, interpretability

San Francisco, USAFounded 2021
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Models & products

Reasoning
Claude 4 Opus
Frontier reasoning, code
Released 2025Params UndisclosedContext 1M
Text
Claude 4 Sonnet
Balanced coding + chat
Released 2025Params UndisclosedContext 500K

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Building reliable, interpretable, and steerable AI systems. Deep hiring for alignment.
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