Is OpenAI: GPT-3.5 Turbo Instruct or GPT 5 Chat cheaper?
OpenAI: GPT-3.5 Turbo Instruct is cheaper ($0.282 / 1M tokens input / $0.376 / 1M tokens output) vs GPT 5 Chat ($0.236 / 1M tokens input / $1.88 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.