OpenAI Cuts GPT-5.6 Sol 50% on Third-Party Gateways Only — $2.50/$15 per Million Tokens Through September 18, With Official API Pricing Untouched
OpenRouter / Vercel Changelog·high signal
OpenRouter and Vercel's AI Gateway both now list GPT-5.6 Sol at a 50% discount — $2.50/M input and $15.00/M output, down from $5.00/$30.00 — while OpenAI's own API docs still show standard pricing. Vercel's changelog dates the promotion precisely: "GPT-5.6 Sol is 50% off on Vercel AI Gateway from August 17 through September 18 on all requests running through AI Gateway." The gateway-only, time-boxed structure reads as targeted price discrimination against the price-sensitive router segment rather than a real list-price cut, and HN commenters tied it directly to Kimi K3 and DeepSeek undercutting frontier US pricing.