# GPT-5.6 update brings Luna to free users and an effort… — QANATONE > OpenAI says the updated GPT-5.6 Sol makes roughly 60% fewer factual errors. Free and Go users get a new default model. Kaynak: https://www.qanatone.com/en/haber/gpt-5-6-sol-luna-guncellemesi/ --- [News](https://www.qanatone.com/en/haber/) # GPT-5.6 update brings Luna to free users and an effort slider 6 Aug 2026 1 min read News · Models OpenAI says the updated GPT-5.6 Sol makes roughly 60% fewer factual errors. Free and Go users get a new default model. ## Who gets what In the August 6 update, Plus and Pro users got an updated GPT-5.6 Sol with a slider to choose how much effort ChatGPT spends on a response. Free and Go users got GPT-5.6 Luna as the new default, with a Think button for harder questions. ## Measured change OpenAI reports roughly 60% fewer factual errors for Sol across three prompt sets, plus gains of 15.6 points on HealthBench Professional and 8.5 on HealthBench Hard. It also published dedicated under-18 safety evaluations for the first time. ## More articles [News · Models ### Meta Superintelligence Labs ships coding agent Muse Code 5 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/meta-muse-code-kodlama-ajani/)[News · Search ### AI-driven orders on Shopify tripled in a year 5 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/shopify-yapay-zeka-siparisleri/)[News · Infrastructure ### AMD data center revenue doubles; Anthropic signs up for 2 GW 4 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/amd-veri-merkezi-anthropic-2-gigavat/)[Data · Lead handling ### What actually changes when you answer a lead in five minutes? 4 Aug 2026 · 4 min](https://www.qanatone.com/en/haber/talebe-bes-dakikada-donmek/)[News · Ads ### Google Ads ends new campaign-level broad match, pushes AI Max 3 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/google-ads-genis-eslesme-ai-max/)[News · Models ### Alibaba opens 2.4T-parameter Qwen3.8-Max in its cloud 3 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/qwen3-8-max-2-4-trilyon/)[News · Payments ### Visa to buy behavioral biometrics firm BioCatch for $2.4 billion 3 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/visa-biocatch-2-4-milyar-dolar/)[News · Policy ### EU AI Act: labelling rules start, high-risk duties delayed 2 Aug 2026 · 1 min](https://www.qanatone.com/en/haber/ab-yapay-zeka-yasasi-seffaflik-kurallari/)