OpenAI makes GPT-5.6 Luna the free ChatGPT default with unlimited text
OpenAI made GPT-5.6 Luna the default for Free and Go users and announced unlimited text chats, while updating GPT-5.6 Sol for Plus and Pro users; OpenAI says ChatGPT serves one billion people weekly.
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Why it moved the index
Unlimited free access to a current general model at a service with one billion weekly users directly expands deployment reach and potential systemic dependence. Magnitude 38 reflects exceptional distribution but not a new frontier capability, and confidence 88 reflects a dated primary rollout with clear limits.
Assessment history
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R1
Toward 38 · confidence 88
Initial inclusion from OpenAI's dated rollout materially expanding default and unlimited free access to GPT-5.6 Luna.
11 Aug 2026
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DoomBench assesses “OpenAI makes GPT-5.6 Luna the free ChatGPT default with unlimited text” as evidence moving toward doom, with magnitude 38 and confidence 88 out of 100 in the deployment reach category.
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The DoomBench assessment of “OpenAI makes GPT-5.6 Luna the free ChatGPT default with unlimited text” is based on reporting from OpenAI and records the editorial rationale, source quality, attribution, and revision history.
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DoomBench summarizes “OpenAI makes GPT-5.6 Luna the free ChatGPT default with unlimited text” as follows: OpenAI made GPT-5.6 Luna the default for Free and Go users and announced unlimited text chats, while updating GPT-5.6 Sol for Plus...
https://www.doombench.com/news/openai-makes-gpt-5-6-luna-the-free-chatgpt-default-with-unlimited-text-2026-08-06