OpenAI cuts GPT-5.6 Sol API prices by over 20%

OpenAI reduced GPT-5.6 Sol API pricing by over 20% for three months: input drops 20% to $4 per million tokens, output drops 33% to $20 per million tokens, available at least through November 21, 2026. The discount applies to API and eligible ChatGPT Work and Codex credits, while Pro, Plus, and Business subscription usage remains unchanged.