OpenAI just cut Sol by 20%. The catch expires November 21.

OpenAI cut GPT-5.6 Sol pricing by over 20% on August 21.

New rate: $4 input, $20 output per million tokens. Down from $5 and $30.

But read the fine print. This is a 3-month promotional price. It reverts on November 21, 2026. No guarantee it extends.

Here is what just happened to your AI budget model.

If your CIO built a financial projection around Sol pricing last week, that projection has a 90-day shelf life. When the promotion ends, your inference costs jump 25% on input and 50% on output. That is not a rounding error. That is a budget crisis hiding in a calendar event.

Meanwhile, DeepSeek V4 Pro costs $0.435 per million input tokens. That is 1/9th of Sol's discounted rate. Moonshot AI's Kimi K3 runs $2.80 input and $14 output through OpenRouter. DoorDash co-founder Andy Fang said Moonshot offered "better quality" at "cheaper cost" for one of their AI experiments. Airbnb and Siemens are already testing Chinese providers.

OpenAI is not cutting prices because it wants to. It is cutting prices because Anthropic's Claude Sonnet 5 intro rate is $2 per million input, and Chinese labs are eating the bottom of the market. Sol held at $5/$30 while Luna dropped 80% and Terra dropped 20% in July. Now Sol is moving too. The flagship is no longer immune.

Audit your AI spend projections today. If you are building on Sol, model two scenarios: the promotional rate and the reversion rate. If the reversion rate breaks your unit economics, you have 90 days to evaluate alternatives. Do not wait until November to discover your AI budget was built on a temporary discount.

SOURCE: https://startupfortune.com/openai-cuts-gpt-56-sol-api-prices-after-holding-the-line-for-months/
VERIFIED: OpenAI official pricing page (developers.openai.com), OpenAI X account August 22 2026, Startup Fortune August 22 2026
SIGNAL: OpenAI is losing pricing power. Enterprise CIOs who budget against promotional rates face a hidden cost cliff in 90 days.