On August 6, 2026, OpenAI announced the removal of text chat rate limits in its ChatGPT Free and Go plans. Simultaneously, the standard model will switch from GPT-5.5 Instant to GPT-5.6 Luna, and a "Think" button will be added to encourage deeper thinking on complex questions.

However, the term "unlimited" has conditions. It only applies to text communication; file uploads, image loading, voice mode, and image generation remain restricted.

This video clarifies the changes in the Free, Go, Plus, and Pro plans, the exact scope of "unlimited," the often misunderstood mechanism of the Think button, and important points to consider to avoid misinterpretations.

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Timeline
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00:00 Opening | Free becomes unlimited
00:40 Chapter 1: What has changed?
02:59 Chapter 2: The exact details of unlimited
05:22 Chapter 3: The true nature of the Think button
07:41 Chapter 4: What will happen to the paid plan?
09:42 Important points | To avoid misunderstandings
11:03 Summary

*The timeline is a guideline based on the script. Please adjust it to match the actual length after recording.

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This time's key points
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▶ Changes to the Free Go Plan (3 points)
・The standard model will switch from GPT-5.5 Instant to GPT-5.6 Luna (gradually starting the week of August 6th)
・The rate limit for text chat will be removed (starting the following week)
・Addition of a "Think" button. Encourages deeper thinking with complex questions (starting the following week)
・Guardrails to prevent abuse will be applied

▶ Three tiers of the GPT-5.6 family
・Sol: Flagship. For complex inference, coding, and agents
・Terra: Balanced. GPT-5.5 level performance at a low cost
・Luna: Lightweight, fast, and low cost. For everyday use ← This is what's coming free this time
*The free version is not the top-of-the-line model, but the lightweight version of the same 5.6 generation.

▶ The exact scope of "unlimited" ★ Most important
・Unlimited only applies to text communication.
・Restrictions remain on: file uploads / image loading / voice mode / image generation
・Using it to repeatedly ask questions with attached photos, or generating a large number of images, is not included.

▶ How the Think button works (points that are easily misunderstood)
・Pressing it does not switch to a more powerful model (such as Sol).
・It is a mechanism that gives additional thinking time to the same Luna.
・It can be used effectively within the scope of text chat, but
combining it with files or images may result in those restrictions.

▶ Changes to Plus and Pro plans (effective immediately from August 6th)
・GPT-5.6 Sol update: Automatically adjusts the level of detail according to the complexity of the question. Presenting the core issue first,

Reducing unnecessary formatting and extraneous information
Factual errors reduced by approximately 68% compared to the previous model (OpenAI internal evaluation)
Thinking slider: Users can adjust the amount of thought put into the answer (web, mobile, desktop)
Instant and Thinking are integrated into the same model, improving consistency of tone
There are no changes to the Sol version for Work and Codex

▶ Examples of improvements shown by the official source
Question: "If I cycle from Mission to Ocean Beach after work, will I get wet?"
Old model: Detailed list of rain, wind, temperature, fog, beach warnings, etc.
New Sol: First concludes "You will not get wet." The main problem, he pointed out, was the headwind, not the rain, and suggested only a light windbreaker.

▶ Rollout
• August 6th (Announcement Date): Sol update and Thinking slider for Plus/Pro → Immediately
• Week of August 6th: GPT-5.6 Luna defaulted to Free and Go
• The following week: Unlimited text chat and Think button for Free and Go
• There may be a delay of several days depending on the region and account.

▶ Notes
• "Unlimited" is for text only. Restrictions on images, audio, and files remain.
• The figures of 62%/68% reduction in factual errors are both based on OpenAI's internal evaluation.

Measured using financial, medical, and legal prompts, and not verified by a third party.
• The rollout is gradual. It is not a bug if it hasn't changed yet.
• The lightweight Luna model will be available for free. The difference between this model and higher-end models becomes apparent in demanding tasks.
Before deciding to cancel your paid subscription because it's now unlimited, we recommend checking which features were limiting your usage.

▶ Background
This update coincides with ChatGPT surpassing 1 billion weekly active users.
OpenAI positions this as "a concrete step towards richer intelligence."

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　Supplement
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This video is based on information released as of August 7, 2026.
Specifications and service scope may change in the future.
This video does not recommend subscribing to or canceling any specific plan.

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