{"id":7620,"date":"2025-08-12T19:05:54","date_gmt":"2025-08-12T10:05:54","guid":{"rendered":"https:\/\/sinbidays.com\/gpt-5-hallucinations-have-they-really-decreased\/"},"modified":"2026-03-09T15:37:53","modified_gmt":"2026-03-09T06:37:53","slug":"gpt-5-hallucinations-have-they-really-decreased","status":"publish","type":"post","link":"https:\/\/sinbidays.com\/en\/gpt-5-hallucinations-have-they-really-decreased\/","title":{"rendered":"GPT-5 hallucinations\u2014have they really decreased?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Hallucination.webp\" alt=\"\" class=\"wp-image-3237\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Hallucination.webp 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Hallucination-300x200.webp 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Hallucination-768x512.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">\u201cWith GPT-5, there won\u2019t be hallucinations anymore, right?\u201d<\/figcaption><\/figure>\n\n<p><br\/><\/p>\n\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1714963467738367\" crossorigin=\"anonymous\"><\/script><!-- click-breeze --><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1714963467738367\" data-ad-slot=\"8109743087\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n<figure class=\"wp-block-pullquote\"><blockquote><p>\u201cIn August 2025, GPT-5 was finally released.<br\/>The AI community\u2014and the whole world\u2014buzzed with excitement.\u201d<\/p><\/blockquote><\/figure>\n\n<p>That day, I happened to get a chance to try the new <strong>GPT-5<\/strong>.<br\/>With the excitement of \u201cHow different will it be this time?\u201d, I started testing right away.<\/p>\n\n<p><br\/><\/p>\n\n<p>\u25bc Want to learn about GPT-5 performance?<\/p>\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-shinbidays wp-block-embed-shinbidays\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"fUedlZagtP\"><a href=\"https:\/\/sinbidays.com\/en\/chatgpt-5-launch-tips-for-when-performance-seems-to-have-declined\/\">ChatGPT-5 Launch: Tips for When Performance Seems to Have Declined<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;ChatGPT-5 Launch: Tips for When Performance Seems to Have Declined&#8221; &#8212; \uc2e0\ube44\ub370\uc774\uc988 (ShinbiDays)\" src=\"https:\/\/sinbidays.com\/en\/chatgpt-5-launch-tips-for-when-performance-seems-to-have-declined\/embed\/#?secret=9zLWyG4QmG#?secret=fUedlZagtP\" data-secret=\"fUedlZagtP\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">First impressions \u2014 less warmth, but more accuracy?<\/h2>\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Features.webp\" alt=\"\" class=\"wp-image-3240\" style=\"width:526px;height:auto\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Features.webp 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Features-300x200.webp 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Features-768x512.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">ChatGPT-5, the one with a cool, detached vibe<\/figcaption><\/figure>\n\n<p>My first experience using GPT-5 was a bit unexpected.<br\/>The conversation felt colder and more formal than before.<br\/>It felt like talking to a professor who\u2019s full of knowledge, but with less emotion behind it.<\/p>\n\n<p>But the performance numbers showed a clear change.<br\/>OpenAI said this GPT-5 reduced <strong>hallucinations<\/strong>\u2014errors where it presents non-facts as if they were true\u2014<br\/>by <strong>more than 45%<\/strong>.<br\/>In particular, in <strong>Thinking mode<\/strong>, it reportedly dropped by up to <strong>65%<\/strong>.<\/p>\n\n<p>And from what I actually experienced,<br\/>I didn\u2019t see hallucinations at all.<br\/>Everything included predictability based on logic and numerical calculation.<br\/>Still, in a way, you could also see it as creativity decreasing.<br\/>After all, the world sometimes moves by unseen forces.<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">Official benchmark results \u2014 checking the numbers<\/h2>\n\n<p>Looking at the published benchmarks,<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>LongFact-Concepts<\/strong>: 0.7%<\/li>\n\n\n\n<li><strong>LongFact-Objects<\/strong>: 0.8%<\/li>\n<\/ul>\n\n<p>Considering that the previous model (o3) was 4.5% and 5.1% respectively, that\u2019s a major improvement.<br\/>GPT-5 definitely seems more cautious when it comes to factual accuracy.<\/p>\n\n<p>In an interview, someone even said it felt like it dropped by 90%.<br\/>From my perspective too, it feels like it\u2019s almost gone.<br\/>That said, in fields with many variables, it can still be wrong,<br\/>but that\u2019s less \u201challucination\u201d and more a limitation in the AI\u2019s capability.<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">But it\u2019s still not perfect<\/h2>\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"782\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Confusion.webp\" alt=\"\" class=\"wp-image-3239\" style=\"width:551px;height:auto\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Confusion.webp 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Confusion-300x293.webp 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Confusion-768x751.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">They say hallucinations haven\u2019t been solved completely.<\/figcaption><\/figure>\n\n<p>What\u2019s interesting is that, as I mentioned, there are still moments when it gets things wrong.<br\/>According to a Guardian report, GPT-5<br\/>said things like \u201cthere are three Bs in blueberry,\u201d<br\/>or even invented states that don\u2019t exist\u2014<br\/>and other basic mistakes were reported as well.<\/p>\n\n<p>In other words, <strong>hallucinations have decreased, but they haven\u2019t disappeared completely<\/strong>.<\/p>\n\n<p>Still, articles can sometimes be light on solid evidence,<br\/>so the surest way is probably to experience ChatGPT-5 for yourself.<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">Conclusion \u2014 it\u2019s definitely smarter, but verification is always essential<\/h2>\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Verification.webp\" alt=\"\" class=\"wp-image-3241\" style=\"width:540px;height:auto\" srcset=\"https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Verification.webp 800w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Verification-300x300.webp 300w, https:\/\/sinbidays.com\/wp-content\/uploads\/2025\/08\/ChatGPT5-Verification-150x150.webp 150w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">That said, don\u2019t be too suspicious either \ud83d\ude42<\/figcaption><\/figure>\n\n<p>GPT-5 is clearly more accurate, and the change is especially noticeable in Thinking mode.<br\/>But you still need to remember that it can be wrong.<\/p>\n\n<p>In the end, always use AI answers as \u201creference material,\u201d<br\/>and build the habit of verifying important decisions and facts yourself.<\/p>\n\n<p>Above all, developing the ability to judge what\u2019s true\u2014<br\/>isn\u2019t that an advantage in the age of AI?<\/p>\n\n<p>Today, we looked into ChatGPT-5 hallucinations.<br\/>Thanks again for joining me.<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cWhat changes did you notice while using GPT-5?<br\/>Share your thoughts in the comments!\u201d<\/p>\n<\/blockquote>\n\n<p><\/p>\n\n<!-- value-touch -->\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1714963467738367\" data-ad-slot=\"1544334733\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>\u201cIn August 2025, GPT-5 was finally released.The AI community\u2014and the whole world\u2014buzzed with excitement.\u201d That day, I happened to get a chance to try the new GPT-5.With the excitement of \u201cHow different will it be this time?\u201d, I started testing right away. \u25bc Want to learn about GPT-5 performance? First impressions \u2014 less warmth, but more accuracy? My first experience using GPT-5 was a bit unexpected.The conversation felt colder&#8230;<\/p>\n","protected":false},"author":1,"featured_media":7621,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[2115],"tags":[3593,2386,3590,3592,3591],"class_list":["post-7620","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai-automation","tag-ai-errors","tag-chatgpt","tag-gpt-hallucinations","tag-gpt-5","tag-thinking"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GPT-5 hallucinations: why they happen and how to reduce them<\/title>\n<meta name=\"description\" content=\"Even in GPT-5, the \u201challucination\u201d problem still occurs. 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