Artificial Intelligence Powerhouse OpenAI Strikes Again! In Taipei time on the early morning of September 23, the official announced two new members to the GPT-6 universe—“GPT-6 Sol” and “GPT-6 Luna.” These two new models inherit the formidable capabilities of the top model Astra, but achieve a major breakthrough in cost-effectiveness: API prices have been reduced by 50% compared to GPT-5.6. They are now fully open to paid subscribers and API developers; free users can also get an early look through the desktop version. (Background: Sun Yihsun borrows again—billion-dollar bet on OpenAI; does Wall Street price it like junk bonds?) (Extra background: OpenAI narrows the door: Pro 20x long-time users can resubscribe, but new customers are still stuck.) The performance revolution in the AI field and the price war are still ongoing. In Taipei time on the early morning of September 23, OpenAI shared major news via its official X (formerly Twitter) account and a blog post, officially announcing that “GPT-6 Sol” and “GPT-6 Luna” are now being added to the GPT-6 universe. In the animated video released by OpenAI, three models are vividly portrayed by different characters: Astra, the purple galaxy representing extreme intelligence; Sol, the flame symbolizing complex compute power; and Luna, the moon-suited spaceman built for lightweight and fast performance. OpenAI emphasized that the new models are built upon the technical progress behind Astra, and by optimizing caching (Caching) and inference efficiency, the cost savings are passed directly back to users—allowing more people to deploy large-scale AI at low cost. Please welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe. GPT-6 Sol and Luna build on the advances behind GPT-6 Astra, bringing much of its strengths into faster and more affordable models to support work at scale. We’ve also made caching and inference more efficient, and… pic.twitter.com/5LiVE4rbFt — OpenAI (@OpenAI) September 22, 2026 Top-tier capabilities trickle down—API prices slashed by 50% The biggest highlight of these two new models is their extreme cost-performance value. Compared with the promotional pricing of the previous generation GPT-5.6, the API costs for Sol and Luna have both been reduced by 50%. According to the latest official pricing, GPT-6 Sol, which targets complex coding and professional work, costs $2 per million input tokens and $10 per million output tokens. Meanwhile, GPT-6 Luna, designed specifically for large-scale everyday tasks, costs only $0.1 per million inputs and $0.5 per million outputs. Compared with Astra, which is designed to achieve the best results but is expensive (input $10 / output $50), the new models offer developers and enterprises more flexible and economical options. Coding deception rate drops sharply—communication becomes more precise Besides the pricing advantages, Sol and Luna also show significant improvements in alignment (Alignment) and model honesty. In OpenAI’s official “coding deception” benchmark tests, Sol’s deception rate dropped dramatically from 10.4% on GPT-5.6 to 1.3%; Luna also fell from 9.5% to 2.8%, performing already quite close to the top model Astra’s 0.5% benchmark. In addition, the new models’ performance on real codebase tasks (such as FrontierCode and DeepSWE), computer operation (OSWorld), and professional work (AutomationBench) has surpassed some competitors at lower cost, and their rate of factual errors is only about half that of their predecessor. OpenAI also specifically optimized the models’ communication style, making their replies clearer, reducing difficult jargon and redundant content—especially suitable for technical and coding-related conversations. Subscriptions open immediately; free users can try via the desktop version In terms of product availability, OpenAI announced that as of today, GPT-6 Sol and Luna are available in ChatGPT Work and the Codex platform for subscribers at the Plus, Pro, Business, Enterprise, and Edu tiers. Developers can also integrate them directly via API calls to gpt-6-sol and gpt-6-luna. For the broad base of Free and Go free users, OpenAI currently allows early access to the GPT-6 Luna model through the desktop app (App). However, the new models have not yet been fully rolled out to general ChatGPT web-based conversations. In the future, updates will be completed gradually via phased rollouts. Related reports OpenAI expects its revenue to change by 10x in the next five years! But OKX pushes OpenAI and Anthropic IPO contracts—10x leverage bets on valuation. OpenAI and Anthropic’s former engineers quit and fire back: Knowing that within 10 years AI might wipe out everyone, they still rush to be first. OpenAI fixes Astra’s three issues and announces it will reset usage quotas before midnight tonight. “OpenAI releases GPT-6 Sol and Luna! Price slashed by 50%, top AI capabilities fully rolled out”—This article was first published on BlockTempo (動區 BlockTempo - the most influential blockchain news media).