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The Domesday Book ofKWJ · AI

Claude Opus 4.7 vs DeepSeek R1

Opus for agentic reliability and compliance; R1 for reasoning at near-zero cost.

Claude Opus 4.7
Anthropic's flagship at the time of this entry: extended thinking on, 1M-token context, the most patient of the frontier models.

Use this when

Production agentic loops, compliance requirements, Anthropic ecosystem.

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DeepSeek R1
The open-weights reasoning model that printed an industry shockwave. Trained at a fraction of frontier-lab costs.

Use this when

Cost-sensitive reasoning, open weights required, self-hosting.

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Cost comparison

Opus $15/$75 per M; R1 free self-hosted (~$2/M via services).