OpenAI is lifting the cap on text-based conversations for all ChatGPT users, including those on the free tier. Starting next week, free and Go users will have unlimited text chats powered by the new GPT-5.6 Luna model, which replaces GPT-5.5 as the default. The company announced the change on August 6, the same day it confirmed ChatGPT had crossed 1 billion weekly users.
The move addresses a longstanding friction point. Free users previously hit message limits that forced them to wait or upgrade. Now the only remaining caps apply to files, images, voice, and image generation.
What changes for free and Go users
ChatGPT Just Went Unlimited: Free GPT-5.6 Luna, Think Button & More
GPT-5.6 Luna becomes the default model immediately. Unlimited text chats and a new "Think" button roll out next week. The Think button lets users request higher reasoning power for complex questions, essentially borrowing deeper inference time on demand.
OpenAI shared internal benchmarks: GPT-5.6 Luna produces 62% fewer factual errors than GPT-5.5-Instant. That gap matters for anyone relying on the free tier for research, drafts, or quick answers.
Plus and Pro tiers get GPT-5.6 Sol and a thinking slider
Paid subscribers receive an upgraded GPT-5.6 Sol model, tuned for quick tasks: web research, planning, writing, and decision support. OpenAI describes the outputs as "more compact" and claims a 68% reduction in factual errors versus GPT-5.5-Instant.
The headline feature for Plus and Pro is a thinking slider. Rather than a binary Think button, paying users can dial up or down how much compute the model spends reasoning through a query. Complex, multi-step problems get more thought; simple lookups get fast answers. The updated GPT-5.6 Sol is available to Plus and Pro users starting today.
One detail worth noting: the GPT-5.6 Sol powering Codex and Work remains unchanged. The upgraded version applies only to general ChatGPT conversations.
What's still limited
Unlimited text chats does not mean unlimited everything. OpenAI is keeping separate caps on file uploads, image analysis, voice mode, and image generation. The company did not disclose specific numbers, but these limits have historically been the levers that push power users toward Plus or Pro.
For teams evaluating ChatGPT against alternatives, the free tier is now a more credible option for text-heavy workflows. But anyone relying on multimodal features still needs to weigh the upgrade.
Logicity's Take
OpenAI is clearly betting that removing friction at the free tier drives habit formation and eventual upgrades. With 1 billion weekly users, even a small conversion lift is massive. Competitors like Google Gemini and Anthropic's Claude still impose stricter free-tier limits. This move pressures them to respond, but the real question is whether OpenAI's usage-based caps on images and files become the new upsell chokepoint.
Relevant for users evaluating how their data is handled across major AI chatbots
Rollout timeline
GPT-5.6 Sol for Plus and Pro users is live now. Free and Go users get GPT-5.6 Luna as the default this week. Unlimited text chats and the Think button arrive next week.
OpenAI did not announce pricing changes. Plus remains $20 per month; Pro is $200 per month. The question for decision-makers: does unlimited free-tier text reduce the case for Plus, or does the thinking slider create enough differentiation to hold the line?
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Source: TechCrunch / Ivan Mehta
OpenAI clarifies Luna positioning, reveals accuracy improvements and new response controls for paid users
The new article adds OpenAI's official clarification that GPT-5.6 Luna is still an upgrade from GPT-5.5 Instant despite being the smallest in the family. It includes specific factual accuracy statistics (62% error reduction for Luna, 68% for Sol compared to GPT-5.5 Instant). It also reveals GPT-5.6 Sol improvements for paying users including better response formatting and a new slider for adjusting response depth.
Plus and Pro Users Get GPT-5.6 Sol and New Thinking Controls
The new article adds details about Plus and Pro tier upgrades including an updated GPT-5.6 Sol model with more reliable answers, a new slider feature letting users control thinking time, and the Think button for Free users. It also includes a quote from OpenAI and user statistics (1 billion active users, 2 million businesses) from CFO Sarah Friar.
Manaal Khan
Tech & Innovation Writer
Produced with AI assistance and reviewed by the Logicity editorial team. Learn more in our Editorial Policy.
