OpenAI announced on 6 August 2026 that unlimited text chats are coming to all users on ChatGPT, and that GPT-5.6 Luna will replace GPT-5.5 as the default model for Free and Go users. The rollout is staged rather than immediate. As reported by TechCrunch on 6 August, the GPT-5.6 Sol upgrade for Plus and Pro users was available that day, the Free and Go changes were described as arriving this week, and unlimited text chats along with a new Think button were stated as arriving next week.
What OpenAI said is changing, and what is not
OpenAI said on 6 August 2026 that the cap on text chats is going away for everyone using ChatGPT. It is text chats specifically. Separate limits remain in place for files, images, voice and image generation, each of which keeps its own allowance. So the change removes the ceiling on the most common way people use the product without making the whole product unmetered.
The default model changes for the largest group of users
Under OpenAI's 6 August 2026 announcement, GPT-5.6 Luna becomes the default model for Free and Go users, replacing GPT-5.5. Plus and Pro users move to GPT-5.6 Sol, which OpenAI said was available on the day of the announcement. That is a meaningful detail for anyone tracking how their brand is described in AI answers: the model generating answers for the free tier, which is the largest tier, is not the same model paying subscribers are using.
New controls: a Think button and a thinking slider
OpenAI said Free and Go users get a new Think button for complex questions, stated as arriving next week. Plus and Pro users get a thinking slider that adjusts how much thought the model puts into an answer. Both put the depth of reasoning under user control rather than leaving it to the model's own routing, which means the same question can now produce a quicker answer or a more considered one depending on what the person clicked.
Who gets what, and when OpenAI said it arrives
The staging matters more than usual here, because none of the headline changes landed all at once. The table below sets out each change against the audience and the timing OpenAI gave on 6 August 2026.
| Change | Who gets it | Timing stated on 6 August |
|---|---|---|
| GPT-5.6 Sol upgrade | Plus and Pro users | Available that day |
| GPT-5.6 Luna as default, replacing GPT-5.5 | Free and Go users | Arriving this week |
| Unlimited text chats | All ChatGPT users | Arriving next week |
| Think button | Free and Go users | Arriving next week |
Why a bigger free tier matters to brands
TechCrunch noted that ChatGPT recently crossed 1 billion weekly users. Removing the message cap from the free tier widens the pool of people who can treat ChatGPT as an everyday research and product-research surface without paying for it, and the people who were previously rationing their questions are the ones most affected. For brands, that enlarges the audience competing to be cited in front of, which is the practical substance of ChatGPT SEO work.
The default model change compounds it. If most people are on the free tier and the free tier's default model changes, then the answers most people see are being produced by different weights than they were last week. Anyone monitoring how often and how accurately their brand appears in AI search answers should expect their readings to move for reasons that have nothing to do with their own content.
What this means for Thai marketers
TechCrunch reports no Thailand-specific rollout detail and no Thai usage figures, and no country restriction was stated in the announcement as reported. Nothing below is a claim about what OpenAI said regarding Thailand.
The reasonable inference is straightforward. Thai users sit in the free tier in large numbers, so a free tier without a message cap means more product questions asked in Thai, by people who would previously have stopped when they hit the limit. That raises the value of having Thai-language content that an answer engine can quote cleanly: specific figures, plain claims, and pages that answer the question directly rather than circling it. It also raises the cost of having no Thai-language coverage at all, since an engine with nothing to cite in Thai will cite something else.
Frequently asked questions
Are unlimited ChatGPT text chats live right now?
No. OpenAI announced them on 6 August 2026 and stated they were arriving next week, so the announcement and the availability are separate events. The Sol upgrade for Plus and Pro was the part available on the day.
Is this live in Thailand?
The source does not say. TechCrunch's report contains no Thailand-specific rollout detail, and no country restriction was stated either way. Treat the timing above as the global staging OpenAI gave, not as a confirmed Thai availability date.
Which model will most ChatGPT users be on?
GPT-5.6 Luna, since OpenAI made it the default for Free and Go users in place of GPT-5.5. Plus and Pro users get GPT-5.6 Sol instead. The largest user segment and the paying segments are therefore on different defaults.
Does unlimited mean every limit is gone?
No. The removal applies to text chats. OpenAI said separate limits remain for files, images, voice and image generation, so heavy use of those formats still runs into a ceiling.
Do I have to do anything as a marketer?
The source does not say, and it makes no recommendation to marketers. The change worth reacting to is the size of the free-tier audience rather than the feature itself, and the sensible first move is a reading of how your brand currently appears in ChatGPT answers before and after the rollout lands.
If you want to know how your brand is described when someone asks ChatGPT about your category, in Thai or in English, Relevant Audience can measure it and show you what is driving the answer.
