Is Claude Sonnet 4.6 or GPT-6 Astra cheaper?
Claude Sonnet 4.6 is cheaper ($3 / 1M tokens input / $15 / 1M tokens output) vs GPT-6 Astra ($10 / 1M tokens input / $50 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.