OpenAI Gives Free ChatGPT Users Unlimited Text Chats and a 'Think' Button

OpenAI is removing its standard text-chat limits for Free and Go users starting next week, while adding a new "Think" button for harder questions, the company announced Thursday.

Starting next week, Free and Go users will have unlimited standard text chats, while limits will continue to apply to file uploads, images, and other tools. The "Think" button — arriving next week and subject to abuse guardrails — lets free users tap GPT-5.6 Luna to give the model more time to work through harder questions.

This week, OpenAI is updating ChatGPT's default model for Free and Go users to GPT-5.6 Luna. According to OpenAI, ChatGPT now has 1 billion weekly users.

For Plus and Pro subscribers, GPT-5.6 Sol in ChatGPT is being updated with "more reliable facts, more focused answers," and a new reasoning slider. The updated Sol is designed to make fewer mistakes, especially when answers depend on dates, numbers, sources, rules, or assumptions.

Plus and Pro users can now use a new slider to choose how much thought ChatGPT puts into each response. Both the updated Sol and the slider are available starting today.

The Numbers: What OpenAI Reported

GPT Model Comparison Matrix
METRIC	GPT-5.5 INSTANT	GPT-5.6 LUNA (FREE/GO)	GPT-5.6 SOL (PLUS/PRO)
Factual Errors	Baseline	~62% less common	~68% less common
Target Users	Default fast-response model	Free/Go default	Plus / Pro
Availability	Default model	This week: model rollout; Next week: Think rollout	Available today
Key Feature	Fast responses for everyday questions	GPT-5.6 Luna + Think button	Slider for reasoning depth

*According to OpenAI's internal evaluation of financial, legal, and medical prompts. Not independently verified by Petatech24.

What Remains Unclear

OpenAI has not detailed how the "Think" button's abuse safeguards will work or what usage limits, if any, will apply after the rollout.

Key Takeaways

• Free users get unlimited text chats — not unlimited access to every ChatGPT tool. File uploads, images, and other tools will still have limits.

• The "Think" button arrives separately from the Luna model rollout, appearing next week. It uses GPT-5.6 Luna, not GPT-5.6 Sol.

• Plus and Pro subscribers get an updated GPT-5.6 Sol with more reliable facts and a new reasoning slider, available starting today.

• OpenAI's factual-error reduction figures (62% and 68%) are company-reported, based on internal evaluations across financial, legal, and medical prompts, and have not been independently verified by Petatech24.

Feature Rollout Quick Summary
CHANGE	WHO GETS IT	WHEN
Unlimited text chats	Free / Go users	Next week
GPT-5.6 Luna as default model	Free / Go users	This week
"Think" button for harder questions	Free / Go users	Next week
Updated GPT-5.6 Sol (more reliable facts)	Plus / Pro users	Available today
Reasoning slider	Plus / Pro users	Available today

Sourcing & Editorial Transparency

• Primary Sources: OpenAI ChatGPT Release Notes, OpenAI Help Center — GPT-5.6 in ChatGPT

• User Metrics: OpenAI says ChatGPT now has 1 billion weekly users.

• Legal/Verification Disclaimer: The factual error reduction metrics are based on OpenAI's internal evaluations and have not been independently verified by this publication. All other claims are attributed to their respective sources.

• Editorial Independence: This report was produced independently by the editorial team.

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