Is Claude Sonnet 4.6 or DeepSeek-V4-Flash cheaper?
DeepSeek-V4-Flash is cheaper ($0.14 / 1M tokens input / $0.28 / 1M tokens output) vs Claude Sonnet 4.6 ($3 / 1M tokens input / $15 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.