Is OpenAI: GPT-4 Turbo or OpenAI: GPT-5.3 Chat cheaper?
OpenAI: GPT-5.3 Chat is cheaper ($0.33 / 1M tokens input / $2.63 / 1M tokens output) vs OpenAI: GPT-4 Turbo ($1.88 / 1M tokens input / $5.64 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.