❯ OpenAI cuts GPT-5.6 Sol input price to $4 per million tokens, down over 20%

PRICINGAccording to Reuters, OpenAI cut developer pricing for its flagship model GPT-5.6 Sol on August 21. Under standard short context, the per-million-token input price drops from $5 to $4, and output from $30 to $20 — an effective one-third reduction on the output side. The cuts also cover ChatGPT Work and Codex credit plans, valid for three months. Pro, Plus, and Business subscription prices are unchanged.

CADENCEThis is OpenAI’s second price change in less than a month, after cutting the Terra and Luna models in late July. That density itself is the signal: the price-protection window for frontier models is shortening, compressed from generation-level adjustments to quarterly ones.

RIVALSPressure comes from two directions. On the Anthropic side, Opus 5’s evaluations and rate limits are drawing concentrated developer complaints. On the China side, DeepSeek released an experimental multimodal model benchmarked against Opus 4.8 the same day, while the anonymous Ox Alpha on OpenRouter is handing out free million-token context allowances. Free and cheap are arriving at the same time, making it hard for flagship models to hold their old prices. Enterprises are also engineering their own way out — AT&T slashed its programming-AI spend by 56% by routing employee requests to cheaper models, with quality down just 2 percentage points.

BUDGETSWhat gets directly rewritten is the cost model of application-layer companies. Long-context batch processing, full-codebase scans, and multi-turn agent loops that didn’t pencil out at the old prices fall back into viable range at the new ones; the middle layer that profits purely off API call-price spreads sees margins squeezed another notch. The three-month window also raises a practical issue: buyers’ contract cycles should be renegotiated quarterly, not annually.

▪ SIGNALA three-month limited-time price cut is not a promotion — it’s OpenAI leaving itself an opening to adjust prices again at any time.