OpenAI Slashes GPT-5.6 Sol API Pricing in Three-Month Promo

OpenAI cut GPT-5.6 Sol API pricing over 20% for a three-month promotion announced August 21, 2026. Standard-mode short-context rates fell from $5.00 to $4.00 per 1M input tokens and from $30.00 to $20.00 per 1M output tokens. GPT-5.6 Terra pricing dropped 20% as well. Whether rates persist beyond the promotional window remains undisclosed.