GPT-5.6 Sol is now 50% off a lower price OpenAI lowered list pricing for GPT-5.6 Sol, and Vercel's AI Gateway 50% discount now applies to the new lower price through September 18, cutting input costs by 20% and output costs by a third. For example, default tier input/output drops from $2.50/$15.00 to $2.00/$10.00 per million tokens. The model ID is unchanged, so existing requests automatically bill at the new rate. OpenAI lowered list pricing for GPT-5.6 Sol https://vercel.com/ai-gateway/models/gpt-5.6-sol , and the 50% AI Gateway discount https://vercel.com/changelog/gpt-5-6-sol-is-50-off-on-ai-gateway-for-the-next-month now applies to the new, lower price through September 18. Input drops 20%, output drops a third. The discount applies on every OpenAI service tier: Service tier | You pay now input / output | New list price input / output | You paid before input / output | |---|---|---|---| Default | $2.00 / $10.00 | $4.00 / $20.00 | $2.50 / $15.00 | Flex | $1.00 / $5.00 | $2.00 / $10.00 | $1.25 / $7.50 | Priority fast mode | $4.00 / $20.00 | $8.00 / $40.00 | $5.00 / $30.00 | Rates are per million tokens for requests up to 272K tokens. Cached tokens, cache writes, long-context requests above 272K, and the US regional rates all move by the same proportion. See the pricing page https://vercel.com/docs/ai-gateway/pricing for all model rates. The model ID is unchanged, so requests you already send bill at the new price automatically. BYOK https://vercel.com/docs/ai-gateway/authentication-and-byok/byok requests bill at your own rate with OpenAI. To use Sol in a coding agent, run vercel ai-gateway coding-agents setup to connect your agents to AI Gateway, then select openai/gpt-5.6-sol in the agent's model settings. See the coding agents guide https://vercel.com/docs/ai-gateway/coding-agents for setup details. Try it in the playground https://vercel.com/ai-gateway/models/gpt-5.6-sol , or browse every language model https://vercel.com/ai-gateway/models?type=text on the AI Gateway.