OpenAI Cuts GPT-5.6 Sol API Pricing Over 20% in Three-Month Promotion

OpenAI reduced GPT-5.6 Sol API pricing by more than 20% for a three-month promotional period announced August 21, 2026. Standard-mode short-context rates dropped 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 was also cut 20%. Whether rates persist beyond the promotional window remains undisclosed.