{"slug": "openai-introduces-gpt-6-sol-and-luna", "title": "OpenAI introduces GPT-6 Sol and Luna", "summary": "OpenAI introduced GPT-6 Sol and GPT-6 Luna on September 22, 2026, two models built on methods behind GPT-6 Astra that cut API prices by 50% versus their GPT-5.6 counterparts. GPT-6 Sol is priced at $2 per 1 million input tokens and $10 per 1 million output tokens, while GPT-6 Luna costs $0.10 and $0.50 per 1 million input and output tokens respectively. OpenAI reported GPT-6 Sol scored 33.2% on AutomationBench at its highest reasoning setting versus 26.9% for Claude Opus 5 at maximum effort, at a cost per task of $0.27, and 68.8% on DeepSWE v1.1 versus 69.9% for Claude Fable 5 at roughly 80% lower cost per task.", "body_md": "# OpenAI introduces GPT-6 Sol and Luna\n\n[OpenAI](https://qazinform.com/tag/openai) has [introduced](https://openai.com/index/introducing-gpt-6-sol-and-luna/) [GPT](https://qazinform.com/tag/chatgpt)-6 Sol and GPT-6 Luna, two new models designed to bring the capabilities of its latest GPT-6 generation to a wider range of professional and everyday applications at lower cost, [Qazinform](https://qazinform.com/) News Agency correspondent reports.\n\nThe company said the models were developed using methods similar to those behind GPT-6 Astra, which OpenAI introduced [earlier this month](https://qazinform.com/news/gpt-6-astra-whats-new-c416dd). While Astra remains the company's most capable model, Sol and Luna are aimed at users and developers who need advanced performance at greater speed and lower cost.\n\nPlease welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe.\n\nGPT-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.\n\nWe’ve also made caching and inference more efficient, and… [pic.twitter.com/5LiVE4rbFt](https://t.co/5LiVE4rbFt)\n\n[September 22, 2026](https://x.com/OpenAI/status/2102460975790137662?ref_src=twsrc%5Etfw)\n\nOpenAI said the new models improve on their GPT-5.6 counterparts in professional work, factuality, coding, computer use and communication, while also reducing API prices by 50%.\n\nUnder the new pricing, GPT-6 Sol costs $2 per 1 million input tokens and $10 per 1 million output tokens, compared with $4 and $20 respectively for GPT-5.6 Sol. GPT-6 Luna costs $0.10 per 1 million input tokens and $0.50 per 1 million output tokens, down from $0.20 and $1.20 for GPT-5.6 Luna.\n\nIn professional workflow testing, OpenAI said GPT-6 Sol achieved a 33.2% score on AutomationBench at its highest reasoning setting, compared with 26.9% for Claude Opus 5 at maximum effort. The company reported that Sol's cost per task was $0.27, while Claude Opus 5 cost 11.1 times more in the same evaluation.\n\nGPT-6 Sol also scored 56.4% on Agents' Last Exam, which tests AI agents on complex professional workflows across 55 sub-industries. OpenAI said the model achieved this result at 60% lower cost per task than the highest Claude Opus 5 result in the evaluation.\n\nThe company also reported improvements in factual accuracy. According to OpenAI's internal evaluation based on de-identified conversations in which users had previously flagged factual errors, GPT-6 Sol makes about half as many mistakes as GPT-5.6 Sol. GPT-6 Luna also showed substantial improvement, with higher-effort settings matching GPT-5.6 Sol at a much lower cost.\n\nFor coding, GPT-6 Sol scored 68.8% on the DeepSWE v1.1 evaluation of complex software engineering tasks, compared with 69.9% for Claude Fable 5 at its highest reported setting. OpenAI said Sol achieved the result at approximately 80% lower cost per task. GPT-6 Luna scored 66.6%, with OpenAI reporting significantly lower costs than comparable competitor models.\n\nThe new models also improve computer-use performance. On the OSWorld 2.0 offline evaluation, GPT-6 Sol achieved a 60.5% score at its highest reasoning setting, compared with 60.3% for Claude Opus 5 at medium effort, while costing approximately 80% less per task.\n\nOpenAI said Sol and Luna also adopt the communication improvements introduced with Astra, including clearer responses, less jargon, fewer unnecessary details and shorter answers while retaining substantive information.\n\nGPT-6 Sol and GPT-6 Luna are available in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users. Free and Go users can access GPT-6 Luna through the desktop app. The models are not yet available in Chat, although OpenAI said it plans to roll them out there gradually.\n\nEarlier, [Qazinform](https://qazinform.com/) News Agency reported that Sam Altman [challenged](https://qazinform.com/news/sam-altman-challenges-estimates-of-chatgpts-water-use-ad23cb) estimates of ChatGPT’s water use.", "url": "https://wpnews.pro/news/openai-introduces-gpt-6-sol-and-luna", "canonical_source": "https://qazinform.com/news/openai-introduces-gpt-6-sol-and-luna-4f805f", "published_at": "2026-09-23 14:09:00+00:00", "updated_at": "2026-09-23 14:32:29.623018+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "generative-ai", "ai-products", "ai-agents"], "entities": ["OpenAI", "GPT-6 Sol", "GPT-6 Luna", "GPT-6 Astra", "GPT-5.6 Sol", "GPT-5.6 Luna", "Claude Opus 5", "Claude Fable 5"], "alternates": {"html": "https://wpnews.pro/news/openai-introduces-gpt-6-sol-and-luna", "markdown": "https://wpnews.pro/news/openai-introduces-gpt-6-sol-and-luna.md", "text": "https://wpnews.pro/news/openai-introduces-gpt-6-sol-and-luna.txt", "jsonld": "https://wpnews.pro/news/openai-introduces-gpt-6-sol-and-luna.jsonld"}}