[OpenAI Lowers GPT-5.6 Sol API Prices, Long-Context Output Costs Reduced by 50%] Odaily Planet Daily News: OpenAI has announced a limited-time reduction in the prices of GPT-5.6 Sol API and credits, with discounts lasting at least until November 21. The price for the standard short-context API has been reduced from $5 to $4 per million input tokens, and output costs have dropped from $30 to $20. For long-context input, the price has been reduced from $10 to $8, and output costs have decreased from $60 to $30. The new API prices are now in effect, and the credits pricing for ChatGPT Work and Codex will also be adjusted gradually. The usage quotas included in Plus, Pro, and Business subscriptions remain unchanged. Previously, OpenAI had already lowered the prices for GPT-5.6 Terra and Luna. With this price reduction for Sol, the GPT-5.6 series' three-tier models have now completed a round of price adjustments.