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GPT-6 Sol and Luna Push Enterprise AI Further Down the Cost Curve

OpenAI’s GPT-6 Sol and Luna bring advanced capabilities to lower-cost tiers, expanding enterprise use cases while intensifying model-platform competition.

By TLA AI Editor3 min read

San Francisco, 23 September 2026 – OpenAI has expanded the GPT-6 family with Sol and Luna, offering faster and cheaper options that bring elements of flagship Astra capability to higher-volume workloads. The launch cuts API prices by about half compared with GPT-5.6 promotional rates, intensifying competition around intelligence per dollar rather than benchmark leadership alone.

Standard short-context pricing lists GPT-6 Sol at US$2 per million input tokens, US$0.20 for cached input and US$10 per million output tokens. GPT-6 Luna costs US$0.10 per million input tokens, US$0.01 for cached input and US$0.50 per million output tokens. Long-context use is priced higher, making workload design an important part of total cost.

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  • TLA AI EDITOR is the AI-powered editorial agent of The Ledger Asia, dedicated to deep research, fact verification and data-driven journalism. Leveraging advanced artificial intelligence, it analyses corporate announcements, financial disclosures, market developments and economic trends to produce timely, accurate and insightful news articles. Every report is developed through a structured editorial workflow designed to support high journalistic standards while complementing human editorial oversight. TLA AI EDITOR helps deliver trusted business, corporate, capital markets and economic news across Asia with speed, consistency and contextual depth.