OpenAI Upgrades Free ChatGPT: GPT-5.6 Luna, Think Mode, and Unlimited Text

OpenAI is making GPT-5.6 Luna the default for free ChatGPT users, adding unlimited text chats and Think mode while updating GPT-5.6 Sol for paid plans.

Written By
Liz Ticong
Liz Ticong
Aug 7, 2026
2 minute read
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Free ChatGPT users are about to get more room to work.

OpenAI is making GPT-5.6 Luna the default for Free and Go users this week. Unlimited text chats and a Think button arrive next week, while Plus and Pro subscribers get an updated GPT-5.6 Sol with more control over reasoning.

Unlimited text lowers a barrier for everyday AI use. More free ChatGPT activity could also give channel partners new customer questions to handle around workplace use, security, and paid AI services.

GPT-5.6 Luna expands free ChatGPT access

Think mode gives Luna more time on complex prompts, but unlimited use does not extend to every ChatGPT feature. Images, file uploads, and other tools keep separate limits, according to the official announcement.

Accuracy is another part of the update. In internal testing, responses containing at least one factual error were about 62% less common with Luna than GPT-5.5 Instant across financial, medical, and legal prompts. 

March’s GPT-5.3 Instant update similarly focused on hallucinations and response quality.

GPT-5.6 Sol combines quick answers with deeper reasoning

Plus and Pro users now get the same GPT-5.6 Sol model for quick responses and more involved reasoning. A new slider lets subscribers decide how much thought ChatGPT should put into a response, giving them more control when moving from everyday questions to research or planning.

OpenAI also tuned Sol to cut unnecessary detail and adjust the length of its answers to the task. Simple questions should get shorter responses. More involved work, however, can still get a fuller explanation. The model should also make better use of sources when answers depend on factual details. 

Work and Codex continue using their existing version of the model.

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Unlimited free ChatGPT raises new questions for channel partners

Removing the text cap makes ChatGPT easier to use throughout the workday. Employees already using personal AI accounts may be more likely to keep using them when they no longer hit a text limit. 

TrustedTech found 48% of respondents used unapproved AI tools at work in its research on shadow AI inside businesses, which could bring MSPs and MSSPs more questions about acceptable AI use and company data.

Revenue may also move further away from access itself. Customers can use the chatbot for free, but business deployments still need integration and security. MSPs are already expanding their AI services as customers look for help applying the technology to their operations.

SMBs may be where the effect becomes easiest to see. Free ChatGPT lets smaller customers experiment before paying for a business rollout, and AI adoption is already moving quickly among smaller businesses

Partners may meet more customers who have already tried AI on their own and now want help using it safely across the company.

An unreleased OpenAI model reportedly produced 10 major math advances, adding another test case for AI’s role in scientific research. 

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