OpenAI Cuts Sol Pricing More Than 20% as Model Price Competition Continues

OpenAI cut pricing for its Sol model by more than 20% on August 21, 2026, to $4 per million input tokens and $20 per million output tokens — the second major OpenAI pricing move this batch cycle, following Luna's 80% cut covered separately, with Google also trimming pricing on its flagship models the same period.

This Is a Pattern, Not a Single Adjustment

Two significant OpenAI price cuts (Luna and now Sol) within roughly three weeks, alongside Google's own flagship pricing reductions and Gemini 3.7 Flash's aggressive introductory pricing (covered separately this batch), confirms sustained, multi-vendor price competition across the industry's leading models — not an isolated promotional adjustment from any single company.

• Sol's new pricing at $4/$20 per million tokens remains a premium tier relative to Luna's $0.20/$1.20 — the cut narrows Sol's cost gap versus competitors without abandoning its positioning as the more capable, more expensive tier
• For enterprise AI budgets, this reinforces the same practical guidance flagged with Grok 4.6 and Luna's pricing moves earlier this batch: quarterly, not annual, cost forecast revision is now the realistic cadence given how frequently major model pricing is moving