OpenAI Updates GPT-5.6 Sol in ChatGPT, Expands GPT-5.6 Luna Access for Free Users on August 6, 2026
On August 6, 2026, OpenAI released an updated version of GPT 5.6 Sol in ChatGPT with improved factual accuracy and a reasoning effort slider for Plus and Pro u…
Published on MyPrivateClaw
Aug 6, 2026, 11:34 PM UTC
Coverage date
Aug 6, 2026
Last updated
Aug 6, 2026, 11:34 PM UTC
News summary
The August 6, 2026 update delivers more focused answers and fewer factual errors—68% fewer with GPT 5.6 Sol than with GPT 5.5 Instant on financial/medical/legal prompts, and 62% fewer with GPT 5.6 Luna—along with a reasoning effort slider for Plus and Pro users, based on internal evaluation by OpenAI that has not been independently verified. Starting August 6, 2026, GPT 5.6 Luna becomes the default model for Free and Go ChatGPT users, with unlimited text chats and a new Think button for deeper reasoning expected the following week subject to abuse guardrails; limits still apply for file uploads, images, and other tools. The version of GPT 5.6 Sol that powers ChatGPT Work and Codex is not changing as part of this August release; those environments still use the July released versions. OpenAI treats both August release GPT 5.6 Sol and GPT 5.6 Luna as High capability in Cybersecurity and B…