GPT-5.6 on Bedrock costs exactly 10% more than OpenAI direct: the August 2026 cost math

GPT-5.6 on Bedrock costs exactly 10% more than OpenAI direct: the August 2026 cost math Summary. On 30 July 2026 OpenAI cut GPT-5.6 Luna by 80% and Terra by 20%, and Amazon Bedrock applied the same re