Is Anthropic: Claude Sonnet 4.5 or DeepSeek: R1 cheaper?
DeepSeek: R1 is cheaper ($0.7 / 1M tokens input / $2.50 / 1M tokens output) vs Anthropic: Claude Sonnet 4.5 ($3 / 1M tokens input / $15 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.