OpenAI has announced a major upgrade for free and “Go” tier ChatGPT users, offering unlimited text interactions without automatic downgrades to lower-performing models during ongoing conversations.
Beginning this week, OpenAI is rolling out GPT-5.6 Luna as the default engine for free-tier users, replacing the existing GPT-5.5 Instant model. In addition, free and Go users will gain access to a new “Think” toggle next week, allowing them to control the reasoning depth and analytical detail applied to model responses. While text messaging capacity will no longer face hard limits, standard usage caps remain applicable for file uploads and image generation.
Concurrently, OpenAI updated its premium GPT-5.6 Sol model for Plus and Pro subscribers to deliver more direct, concise, and accurate responses. Internal evaluations indicate that the updated GPT-5.6 Sol model achieves a 68 percent reduction in factual error rates regarding dates, statistics, citations, and assumptions within financial, medical, and legal queries compared to GPT-5.5 Instant.
Key Highlights of the OpenAI Update:
- Unlimited Texting: Free and Go tier users receive unlimited text interactions without model downgrades.
- New Default Model: GPT-5.6 Luna replaces GPT-5.5 Instant as the primary free-tier engine.
- Reasoning Control: “Think” button introduced for free users to adjust analytical depth.
- Premium Enhancements: GPT-5.6 Sol updated for Plus/Pro users, reducing factual error rates by ~68%.
📊 Fact-Sheet Summary
- Company: OpenAI.
- Product: ChatGPT (Free, Go, Plus, Pro Tiers).
- New Free Engine: GPT-5.6 Luna.
- New Feature: “Think” toggle for customizable reasoning depth.
- Premium Model: GPT-5.6 Sol (Enhanced accuracy, 68% lower error rate in complex domains).
- Limitations Retained: File upload and image generation usage caps remain in place.AINews
