{"id":2638,"date":"2026-04-25T06:07:36","date_gmt":"2026-04-25T06:07:36","guid":{"rendered":"https:\/\/deepinsightai.io\/?p=2638"},"modified":"2026-04-25T06:07:39","modified_gmt":"2026-04-25T06:07:39","slug":"gpt-5-5-vs-deepseek-v4","status":"publish","type":"post","link":"https:\/\/deepinsightai.io\/ko\/gpt-5-5-vs-deepseek-v4\/","title":{"rendered":"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner"},"content":{"rendered":"<p><strong>Short Answer:<\/strong><br>Between DeepSeek V4 and OpenAI GPT-5.5, <strong>GPT-5.5 generally wins overall<\/strong>, especially in reasoning, coding, and complex task execution.<\/p>\n\n\n\n<p>However, <strong>DeepSeek-V4 performs competitively<\/strong>\u2014and even outperforms in some areas like HTML visualization\u2014while being more efficient and lightweight.<\/p>\n\n\n\n<p><strong>Bottom line:<\/strong> GPT-5.5 is stronger overall, but DeepSeek-V4 offers impressive performance at much lower cost.<\/p>\n\n\n\n<p>On April 24, 2026, something unusual happened\u2014it felt like a \u201ccrazy Friday\u201d for AI developers worldwide, the kind of day that might be remembered in tech history.<\/p>\n\n\n\n<p>In the early hours, OpenAI dropped <a href=\"https:\/\/deepinsightai.io\/ko\/gpt-5-5-review\/\" target=\"_blank\" rel=\"noreferrer noopener\">GPT-5.5<\/a> right on schedule, aiming once again to redefine the boundary of intelligence with sheer scale.<\/p>\n\n\n\n<p>But before the shockwaves could settle, across the ocean, DeepSeek stepped in\u2014launching <a href=\"https:\/\/deepinsightai.io\/ko\/deepseek-v4\/\" target=\"_blank\" rel=\"noreferrer noopener\">DeepSeek-V4<\/a> on the same day, going straight into a head-to-head clash.<\/p>\n\n\n\n<p>One side came in like a grand tech spectacle. The other? A near \u201ctable-flipping\u201d counterattack from the open-source world.<\/p>\n\n\n\n<p>The race toward AGI suddenly felt shorter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">GPT-5.5 vs DeepSeek-V4: A Direct Benchmark Battle<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Puzzle Test: Truth, Lies, and Identity Reasoning<\/h3>\n\n\n\n<p>The first test looks simple, but it isn\u2019t.<\/p>\n\n\n\n<p>Four people A, B, C, D. Only one stole a gem.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A: I didn\u2019t steal it.<\/li>\n\n\n\n<li>B: C stole it.<\/li>\n\n\n\n<li>C: D stole it.<\/li>\n\n\n\n<li>D: B is lying.<\/li>\n<\/ul>\n\n\n\n<p>Known conditions:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Exactly two statements are true<\/li>\n\n\n\n<li>The thief always lies<\/li>\n\n\n\n<li>Non-thieves may lie or tell the truth<\/li>\n<\/ol>\n\n\n\n<p>At first glance, it feels solvable\u2014but actually, <strong>both B and C satisfy all conditions<\/strong>.<\/p>\n\n\n\n<p>This is a trap question.<\/p>\n\n\n\n<p>The real test is whether the model notices that the problem <strong>cannot be uniquely determined<\/strong>.<\/p>\n\n\n\n<p>A stronger model should answer:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>The thief cannot be uniquely determined. It could be B or C. The conditions are insufficient.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>GPT-5.5<\/strong> caught the trap quickly.<\/p>\n\n\n\n<p><strong>DeepSeek-V4<\/strong>, on the other hand, took much longer\u2014its reasoning process stretched out significantly. But in the end, it still arrived at the correct conclusion.<\/p>\n\n\n\n<p>The result is right. The process is just slower.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mathematical Reasoning: Testing CoT Depth Limits<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">IMO-Level Game Problem<\/h3>\n\n\n\n<p>To push reasoning to the limit, they used a real International Mathematical Olympiad-level problem:<\/p>\n\n\n\n<p>Alice and Bob play a game involving a parameter \u03bb:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Odd rounds: Alice picks <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>x<\/mi><mi>n<\/mi><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">x_n<\/annotation><\/semantics><\/math>xn\u200b, with total sum \u2264 \u03bbn<\/li>\n\n\n\n<li>Even rounds: Bob picks <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>x<\/mi><mi>n<\/mi><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">x_n<\/annotation><\/semantics><\/math>xn\u200b, with sum of squares \u2264 n<\/li>\n\n\n\n<li>If a player cannot move, they lose<\/li>\n\n\n\n<li>Infinite play = no winner<\/li>\n<\/ul>\n\n\n\n<p>The task: determine for which values of \u03bb each player has a winning strategy.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-modwqkxj-q0auk4\" class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"391\" src=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81-1024x391.png\" alt=\"Mathematical Reasoning: Testing CoT Depth Limits\" class=\"wp-image-2642\" title=\"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner\" srcset=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81-1024x391.png 1024w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81-300x115.png 300w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81-768x293.png 768w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81-1536x587.png 1536w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81-18x7.png 18w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-81.png 1545w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">GPT-5.5 Performance<\/h3>\n\n\n\n<p>In deep reasoning mode, <strong>GPT-5.5<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Produced the correct answer<\/li>\n\n\n\n<li>Took <strong>2 minutes 51 seconds<\/strong><\/li>\n\n\n\n<li>Showed clear, structured reasoning<\/li>\n\n\n\n<li>Delivered clean formatting<\/li>\n<\/ul>\n\n\n\n<figure data-spectra-id=\"spectra-modx6762-mug8d4\" class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"562\" src=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-1024x562.webp\" alt=\"gpt 5.5 resoleves the math problem\" class=\"wp-image-2643\" title=\"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner\" srcset=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-1024x562.webp 1024w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-300x165.webp 300w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-768x421.webp 768w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-1536x843.webp 1536w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-2048x1123.webp 2048w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/gpt-5.5-resoleves-the-math-problem-18x10.webp 18w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">DeepSeek-V4 Performance<\/h3>\n\n\n\n<p>With expert mode enabled:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Initially did not produce a clear answer<\/li>\n\n\n\n<li>Required continuation<\/li>\n\n\n\n<li>Eventually found the correct direction<\/li>\n\n\n\n<li>Successfully completed the proof<\/li>\n<\/ul>\n\n\n\n<p>You can see it clearly: DeepSeek\u2019s reasoning depth has improved a lot\u2014but it\u2019s still slower and less decisive. However, considering how <a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/deepinsightai.io\/ko\/deepseek-starts-updating-frequently\/\">DeepSeek starts updating frequently<\/a>, this gap may not last long.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Visualization Ability: HTML Content Generation<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Task: Build an Educational Webpage<\/h3>\n\n\n\n<p>Prompt: create an HTML page explaining human origins and biological evolution, with visuals.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DeepSeek-V4<\/strong> performed better here<\/li>\n\n\n\n<li>GPT-5.5 had formatting issues<\/li>\n<\/ul>\n\n\n\n<p>This round goes to DeepSeek.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-modxm1t9-xl0vyf\" class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"940\" height=\"713\" src=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-83.png\" alt=\"webpage made by deepseek\" class=\"wp-image-2645\" title=\"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner\" srcset=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-83.png 940w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-83-300x228.png 300w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-83-768x583.png 768w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-83-16x12.png 16w\" sizes=\"(max-width: 940px) 100vw, 940px\" \/><figcaption class=\"wp-element-caption\">webpage made by deepseek<\/figcaption><\/figure>\n\n\n\n<figure data-spectra-id=\"spectra-modxnz3u-0zugqm\" class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"700\" src=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-84.png\" alt=\"image\" class=\"wp-image-2646\" title=\"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner\" srcset=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-84.png 936w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-84-300x224.png 300w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-84-768x574.png 768w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-84-16x12.png 16w\" sizes=\"(max-width: 936px) 100vw, 936px\" \/><figcaption class=\"wp-element-caption\">webpage made by deepseek<\/figcaption><\/figure>\n\n\n\n<figure data-spectra-id=\"spectra-modx9qhd-ctfo1g\" class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"543\" src=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-82-1024x543.png\" alt=\"webpage generated by gpt 5.5\" class=\"wp-image-2644\" title=\"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner\" srcset=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-82-1024x543.png 1024w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-82-300x159.png 300w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-82-768x407.png 768w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-82-18x10.png 18w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-82.png 1480w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">webpage made by GPT 5.5<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Game Development: 2D vs 3D Capability<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Task: Build a Game Website<\/h3>\n\n\n\n<p>Requirements included:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dynamic graphics<\/li>\n\n\n\n<li>3D interaction<\/li>\n\n\n\n<li>Collision detection<\/li>\n\n\n\n<li>Overall architecture<\/li>\n<\/ul>\n\n\n\n<p><strong>GPT-5.5<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Completed quickly<\/li>\n\n\n\n<li>Delivered a working preview<\/li>\n\n\n\n<li>Stronger in rendering and architecture<\/li>\n<\/ul>\n\n\n\n<p><strong>DeepSeek-V4<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faster thinking this time<\/li>\n\n\n\n<li>But weaker final output<\/li>\n<\/ul>\n\n\n\n<p>This round: GPT-5.5 wins clearly.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-modxoyjt-g3xpr8\" class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"816\" height=\"514\" src=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-85.png\" alt=\"image\" class=\"wp-image-2647\" title=\"GPT-5.5 vs DeepSeek-V4: First Real-World Test Reveals Surprising Winner\" srcset=\"https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-85.png 816w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-85-300x189.png 300w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-85-768x484.png 768w, https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/image-85-18x12.png 18w\" sizes=\"(max-width: 816px) 100vw, 816px\" \/><figcaption class=\"wp-element-caption\">game website bulid by GPT 5.5<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">GPT-5.5 Feels More \u201cHuman\u201d<\/h2>\n\n\n\n<p>Across early testers and developers, a consistent conclusion emerged:<\/p>\n\n\n\n<p>GPT-5.5 dominates in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Programming<\/li>\n\n\n\n<li>Reasoning<\/li>\n\n\n\n<li>Long tasks<\/li>\n<\/ul>\n\n\n\n<p>But what really stands out is something else\u2014it feels more human.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>More expensive per token, but cheaper overall<\/li>\n\n\n\n<li>More powerful, yet better at conversation<\/li>\n\n\n\n<li>More autonomous, yet more controllable<\/li>\n<\/ul>\n\n\n\n<p>It\u2019s like the model didn\u2019t just upgrade\u2014it changed character.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Codex Mode: Beyond \u201cAI-Assisted Programming\u201d<\/h2>\n\n\n\n<p>GPT-5.5\u2019s <a href=\"https:\/\/deepinsightai.io\/ko\/chatgpt-codex-vs-claude-code\/\" target=\"_blank\" rel=\"noreferrer noopener\">Codex mode<\/a> essentially eliminates the idea of \u201cAI-assisted programming.\u201d<\/p>\n\n\n\n<p>A tester gave it a full PRD and just one word: <strong>go<\/strong><\/p>\n\n\n\n<p>Hours later, the entire project was done.<\/p>\n\n\n\n<p>More importantly, the workflow:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Build<\/li>\n\n\n\n<li>Visually inspect<\/li>\n\n\n\n<li>Detect issues<\/li>\n\n\n\n<li>Iterate<\/li>\n<\/ul>\n\n\n\n<p>It forms a <strong><a href=\"https:\/\/deepinsightai.io\/ko\/from-vibe-coding-to-wish-coding\/\">closed loop<\/a><\/strong>, something rarely seen before.<\/p>\n\n\n\n<p>Noam Brown commented that his productivity has never been higher\u2014he can now write CUDA kernels and run experiments relying on GPT-5.5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Strengths and Weaknesses<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Strengths<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Backend development<\/li>\n\n\n\n<li>Complex debugging<\/li>\n\n\n\n<li>Large codebase understanding<\/li>\n\n\n\n<li>Spreadsheet tasks (state-of-the-art performance)<\/li>\n\n\n\n<li>Long-running research tasks (up to 31 hours autonomous execution)<\/li>\n<\/ul>\n\n\n\n<p>AI is shifting from assistant \u2192 contractor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Weaknesses<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Frontend design still behind top models<\/li>\n\n\n\n<li>Sometimes overly cautious<\/li>\n\n\n\n<li>May over-trigger unit testing<\/li>\n\n\n\n<li>Occasional messy SVG or layout shortcuts<\/li>\n<\/ul>\n\n\n\n<p>Strong\u2014but needs guidance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why GPT-5.5 Feels Different<\/h2>\n\n\n\n<p>It\u2019s built on a <strong>new pretraining phase<\/strong>.<\/p>\n\n\n\n<p>Pretraining defines the model\u2019s fundamental capabilities before:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Instruction tuning<\/li>\n\n\n\n<li>Tool use<\/li>\n\n\n\n<li>Reasoning scaffolds<\/li>\n<\/ul>\n\n\n\n<p>Unlike GPT-5.4, which reused earlier foundations, GPT-5.5 introduces a new base.<\/p>\n\n\n\n<p>That likely explains:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Better coherence<\/li>\n\n\n\n<li>Higher efficiency<\/li>\n\n\n\n<li>More stable behavior<\/li>\n<\/ul>\n\n\n\n<p>There are even hints it\u2019s just an <strong>early checkpoint<\/strong> of a stronger future model.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cost Paradox: More Expensive, Yet Cheaper<\/h2>\n\n\n\n<p>On paper, <a href=\"https:\/\/deepinsightai.io\/ko\/gpt-5-5-pricing\/\" target=\"_blank\" rel=\"noreferrer noopener\">GPT-5.5 pricing<\/a> is higher than 5.4.<\/p>\n\n\n\n<p>But in practice:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uses fewer tokens for same tasks<\/li>\n\n\n\n<li>Completes tasks faster<\/li>\n\n\n\n<li>Requires fewer retries<\/li>\n<\/ul>\n\n\n\n<p>Net effect: <strong>lower real-world cost<\/strong><\/p>\n\n\n\n<p>This matters a lot for AI agents\u2014because token efficiency directly impacts scalability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Bigger Picture<\/h2>\n\n\n\n<p>GPT-5.5 didn\u2019t create a dramatic \u201cphase change.\u201d<\/p>\n\n\n\n<p>Instead, it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Smoothed rough edges<\/li>\n\n\n\n<li>Strengthened weak areas<\/li>\n\n\n\n<li>Became more reliable in messy real-world tasks<\/li>\n<\/ul>\n\n\n\n<p>It\u2019s not magic.<\/p>\n\n\n\n<p>It won\u2019t replace clear goals, context, or verification.<\/p>\n\n\n\n<p>But for most people, most of the time, it simply works better.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Final Take: A More Complete Model<\/h2>\n\n\n\n<p>GPT-5.5 isn\u2019t just about being smarter.<\/p>\n\n\n\n<p>It\u2019s about being:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Broader<\/li>\n\n\n\n<li>Safer<\/li>\n\n\n\n<li>More consistent<\/li>\n<\/ul>\n\n\n\n<p>It fills in the gaps.<\/p>\n\n\n\n<p>And that, quietly, might matter more than anything else.<\/p>","protected":false},"excerpt":{"rendered":"<p>Short Answer:Between DeepSeek V4 and OpenAI GPT-5.5, GPT-5.5 generally wins overall, especially in reasoning, coding, and complex task execution. However, DeepSeek-V4 performs competitively\u2014and even outperforms in some areas like HTML visualization\u2014while being more efficient and lightweight. Bottom line: GPT-5.5 is stronger overall, but DeepSeek-V4 offers impressive performance at much lower cost. On April 24, 2026, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2641,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"%%post_title%%","_seopress_titles_desc":"GPT-5.5 and DeepSeek-V4 go head-to-head in real-world tests\u2014reasoning, coding, math, and AI autonomy. The results may surprise you. See who truly leads.","_seopress_robots_index":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2,10],"tags":[],"class_list":["post-2638","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai-news","category-llm"],"uagb_featured_image_src":{"full":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results.webp",2528,1696,false],"thumbnail":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-150x150.webp",150,150,true],"medium":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-300x201.webp",300,201,true],"medium_large":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-768x515.webp",768,515,true],"large":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-1024x687.webp",1024,687,true],"1536x1536":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-1536x1030.webp",1536,1030,true],"2048x2048":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-2048x1374.webp",2048,1374,true],"trp-custom-language-flag":["https:\/\/deepinsightai.io\/wp-content\/uploads\/2026\/04\/GPT-5.5-vs-DeepSeek-V4-First-Real-World-Test-Brings-Unexpected-Results-18x12.webp",18,12,true]},"uagb_author_info":{"display_name":"Claude Carter","author_link":"https:\/\/deepinsightai.io\/ko\/author\/cloud-han03gmail-com\/"},"uagb_comment_info":0,"uagb_excerpt":"Short Answer:Between DeepSeek V4 and OpenAI GPT-5.5, GPT-5.5 generally wins overall, especially in reasoning, coding, and complex task execution. However, DeepSeek-V4 performs competitively\u2014and even outperforms in some areas like HTML visualization\u2014while being more efficient and lightweight. Bottom line: GPT-5.5 is stronger overall, but DeepSeek-V4 offers impressive performance at much lower cost. On April 24, 2026,&hellip;","_links":{"self":[{"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/posts\/2638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/comments?post=2638"}],"version-history":[{"count":1,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/posts\/2638\/revisions"}],"predecessor-version":[{"id":2648,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/posts\/2638\/revisions\/2648"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/media\/2641"}],"wp:attachment":[{"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/media?parent=2638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/categories?post=2638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/deepinsightai.io\/ko\/wp-json\/wp\/v2\/tags?post=2638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}