OpenAI улучшила GPT-5.6 Sol и открыла GPT-5.6 Luna бесплатным пользователям

OpenAI on August 11, 2026 announced two updates to ChatGPT at once: the improved GPT-5.6 Sol became more accurate and stable, while GPT-5.6 Luna is now open to free users with no limits on the number of chats.

What changed in GPT-5.6 Sol

GPT-5.6 Sol received improvements in accuracy and response stability. According to the OpenAI blog, the update reduces the number of cases where the model produced contradictory or inconsistent results for similar queries — a typical problem with large language models, especially noticeable during iterative work.

Sol is the flagship version in the GPT-5.6 lineup, aimed at complex tasks: multi-step reasoning, working with large documents, and in-depth analysis. After the update, it remains available to paid ChatGPT subscribers.

What free ChatGPT users get

GPT-5.6 Luna is now available to free users with no limits on the number of everyday chats — this is the main change for the broad audience.

• Unlimited chats with GPT-5.6 Luna — for free accounts
• Improved accuracy and stability of GPT-5.6 Sol — for paid subscribers
• Luna is optimized for everyday tasks: questions and answers, text processing, information lookup
• Sol remains the model for complex and resource-intensive requests

Luna is a lightweight version of the model, designed for the typical requests of the majority of users. Previously, the free ChatGPT tier implied message limits and restricted access to modern models. The expansion removes these barriers in the everyday use segment.

"ChatGPT now offers an improved GPT-5.6

Sol with enhanced accuracy and stability, as well as unlimited everyday chats with GPT-5.6 Luna for free users," — according to the official OpenAI blog from August 11, 2026.

Why OpenAI split the lineup into Sol and Luna

The two-model strategy — powerful for paying audiences and lightweight for free users — is a classic freemium scheme: broad reach without a subscription supports user base growth, while a portion of the audience eventually transitions to paid tiers for more advanced capabilities. OpenAI's competitors — Anthropic with Claude and Google with Gemini — apply a similar approach.

Expanding free access lowers the entry barrier and strengthens ChatGPT's position in the market where AI assistants compete for the user's primary interaction. According to analyst data, it is precisely the habit of a specific interface that determines the long-term choice of a paid tier.

What this means

The GPT-5.6 Sol update reinforces the value of paid subscriptions, while the Luna expansion lowers the entry threshold for new users — OpenAI is simultaneously working with both audience segments without sacrificing one for the other.

Frequently asked questions

How does GPT-5.6 Sol differ from GPT-5.6 Luna?

GPT-5.6 Sol is the flagship model for complex tasks, available to paid subscribers; on August 11, 2026 it received improved accuracy and stability. GPT-5.6 Luna is a lightweight version for everyday tasks, now available to free ChatGPT users with no limits on the number of chats.

Is a subscription required to access GPT-5.6 Luna?

No. GPT-5.6 Luna is available without a paid subscription — free ChatGPT users get unlimited chats for everyday tasks. Access to GPT-5.6 Sol remains a privilege of paid tiers.