Following the release of its flagship GPT-6 Astra, OpenAI has expanded its latest model generation with two new additions – GPT-6 Sol and GPT-6 Luna. The two models bring Astra’s architectural improvements, including lower hallucination rates, enhanced multi-step reasoning, and refined writing, down to lower operational costs. OpenAI says these models also provide higher speed and efficiency across consumer plans.
In essence, you get a taste of OpenAI’s flagship models at a more accessible price point.
GPT-6 Sol vs Luna: What’s on offer
GPT-6 Sol: The Sol variant is engineered for multi-step agentic tasks, complex writing, and deep technical research. It reduces factual errors by half compared to its predecessor while approaching Astra-level accuracy.
GPT-6 Luna: The Luna variant is a lightweight, high-speed model built for quick answers, document summarisation, and daily conversational drafting.
Who can access GPT-6 and at what price
Unlike the previous versions of GPT, there are certain limitations to how you can access the latest versions of the GPT-6 model.
| Subscription tier | Monthly price | Available GPT-6 Models |
| ChatGPT Free | Rs 0 / month | • GPT-6 Luna (Accessible exclusively via the ChatGPT Desktop App for macOS & Windows) • Standard web chat continues on legacy models |
| ChatGPT Plus | ~Rs 1,980 / month | • GPT-6 Astra (Full access)• GPT-6 Sol (Inside ChatGPT Work mode & workspace)• GPT-6 Luna (Fast chat engine & desktop) |
| ChatGPT Team | ~Rs 2,480 to Rs 2,980 / user/month | • GPT-6 Astra (Higher usage limits)• GPT-6 Sol (ChatGPT Work & Codex workspaces)• GPT-6 Luna |
| ChatGPT Pro | ~Rs 19,820 / month | • GPT-6 Astra (Uncapped / Priority reasoning) • GPT-6 Sol (Full access)• GPT-6 Luna |
Hence, here’s how one can access GPT-6 via ChatGPT in India:
Free and desktop users: Free tier subscribers using the standalone ChatGPT Desktop app get access to GPT-6 Luna, providing a significantly faster and more factual desktop assistant for quick, everyday tasks at no cost.
Plus and Pro subscribers: Paid users gain targeted choice. Switching to GPT-6 Sol inside ChatGPT Work mode for deep, extended multi-step assignments is recommended, while users can retain access to the full GPT-6 Astra model for advanced reasoning and computer-use tasks.