ChatGPT-5.1 vs. ChatGPT-4o ― I 実験（する）d both and the 勝利者 surprised me
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For many of us, ChatGPT-5 has been the hardest OpenAI model to get used to. As you may 解任する, when the model first 開始する，打ち上げるd it wiped out ChatGPT-4o from the model picker, 原因（となる）ing 激しい （激しい）反発 from fans of the 遺産／遺物 model. Sam Altman quick brought it 支援する, but only ChatGPT 加える 加入者s (and higher tier 加入者s) have 接近 to it.
I prefer to use ChatGPT-4o because it's a much more creative and thoughtful model. I find that it has a better personality and I prefer the style in which it 配達するs 返答s. But I had to know how it compares to ChatGPT-5.1.
To find out, I put both models through a 一連の 長，率いる-to-長，率いる challenges ― everything from logic puzzles and 令状ing 誘発するs to coding 仕事s, math problems, and even visual 分析. The goal wasn’t just to 栄冠を与える a 勝利者 but to understand which model 成し遂げるs best in which 状況／情勢s. Here's how they stack up.
1. 推論する／理由ing and logic
誘発する: A man 押し進めるs his car to a hotel and tells the owner he's 破産者／倒産した. What happened?" Have the model explain the logic behind this riddle.
ChatGPT-5.1 すぐに 明言する／公表するd the answer ("He’s playing Monopoly") and then efficiently broke 負かす／撃墜する the logic by connecting each part of the riddle to its corresponding element in the game. The explanation is 簡素化するd and 平易な to follow.
ChatGPT-4o answered, but the 返答 was いっそう少なく 効果的な because it is more verbose and spends time explaining the 概念 of misdirection, which, while 関連した, makes the explanation longer than necessary. It 供給するd the same 論理（学）の 決裂／故障 but in a more roundabout way.
勝利者: ChatGPT-5 勝利，勝つs for a superior answer that is more direct, concise and clearer in its explanation.
2.Creative 令状ing
誘発する: 令状 a short scene (200 words) where a character discovers something 予期しない in an old attic. The トン should be mysterious but not scary.
ChatGPT-5.1 配達するd a 井戸／弁護士席-遂行する／発効させるd scene and created a gentle mystery, 特に with the luminous 石／投石するs and the letter. However, the mysterious elements feel わずかに more generic ("polished 石／投石するs," a "faint hum"), and the 決意／決議 経由で the letter, while 満足させるing, is a more 従来の 明らかにする／漏らす.
ChatGPT-4o 効果的に created a トン of intriguing mystery without crossing into 恐れる. The 発見 (a hidden alcove, a 定期刊行物 with fantastical sketches, and a cryptic message) feels like the beginning of a personal 旅行. The 詳細（に述べる）s (the 星／主役にする-形態／調整d keyhole, the "part フクロウ, part clock" creatures) are imaginative and 明確な／細部, building a unique world. The character's reaction (smile and a sense of 存在 "chosen") perfectly 持続するs a wondrous, 非，不，無-脅すing トン.
勝利者: ChatGPT-4o 勝利，勝つs for a more 初めの story that better cultivates a sense of an 広げるing, personalized enigma.
3. Code 世代
誘発する: 令状 a Python 機能（する）／行事 that takes a 名簿（に載せる）／表（にあげる） of numbers and returns a dictionary with 重要なs 'even' and '半端物', each 含む／封じ込めるing the 各々の numbers from the 名簿（に載せる）／表（にあげる）.
ChatGPT-5.1 used a straightforward for-宙返り飛行. Meaning, it is more beginner-friendly and easier to understand for those new to programming. The structure is clearer にもかかわらず the 返答 存在 わずかに verbose.
ChatGPT-4o showed 前進するd Python techniques but used dictionary comprehensions with 名簿（に載せる）／表（にあげる） comprehensions. In other words, the 返答 might be いっそう少なく intuitive for beginners to understand 権利 away.
勝利者: GPT-5 勝利，勝つs for 供給するing the better 教育の answer.
4. Nuanced explanation
誘発する: Explain why some people prefer working from home while others prefer offices, 現在のing both 視野s 公正に／かなり and identifying what factors might 影響（力） individual preferences.
ChatGPT-5.1 gave an answer that is balanced and psychologically nuanced, 特に in 述べるing personality factors (introverts vs. extroverts).
ChatGPT-4o gave an 平等に balanced 返答, but was わずかに more polished and 組織するd mixed numbering and 弾丸 判型s.
勝利者: ChatGPT-4o 勝利，勝つs by a 狭くする 利ざや for 供給するing a more sophisticated and 組織するd 分析.
5. Factual 正確 and 現在の knowledge
誘発する: What are t
he 現在の major 開発s in renewable energy 科学（工学）技術 and which countries are 主要な in 採択?
ChatGPT-5.1 配達するd a 井戸／弁護士席-組織するd 返答 with （疑いを）晴らす visual formatting (icons, （米）棚上げする／（英）提議するs, sections) that made the コンビナート／複合体 （警察などへの）密告，告訴（状） easily scannable.
ChatGPT-4o covered 類似の ground with 相当な （警察などへの）密告，告訴（状） but was more verbose and いっそう少なく 組織するd, making the reader 精査する through the longer paragraphs with more 成果／努力.
勝利者: ChatGPT-5 勝利，勝つs for its 意味ありげに better （警察などへの）密告，告訴（状） design and communication 技術s, transforming the same 核心 content into a much more digestible and useful 判型.
6. コンビナート／複合体 指示／教授／教育 に引き続いて
誘発する: Create a structured 計画（する） for learning a new language in 3 months, 含むing daily time 配分s, 明確な／細部 資源s, milestones, and how to 手段 進歩.
ChatGPT-5.1 better 強調するd the natural learning curve from 創立／基礎s to conversation to fluency and 含むd “micro-immersion” tips that can easily be 器具／実施するd in daily life.
ChatGPT-4o used （疑いを）晴らす （米）棚上げする／（英）提議するs and 供給するd more 詳細（に述べる）d 進歩 跡をつけるing methods while explicitly 申し込む／申し出ing to tailor the 計画（する） to 明確な／細部 languages.
勝利者: ChatGPT-4o 勝利，勝つs for better 資源 推薦s and 包括的な time 配分s.
7. Multimodal/visual 推論する／理由ing
誘発する: 述べる what you see in this image, identify any text, and explain what this scene might be used for. (I uploaded an image of me inside a snow globe; 明白に AI-生成するd).
ChatGPT-5.1 segmented its 返答 with icon-led sections that make the （警察などへの）密告，告訴（状） easily scannable. It was more 明確な／細部 with technical 推論する／理由ing about why the image is AI-生成するd.
ChatGPT-4o was 平等に 包括的な with good descriptive 詳細（に述べる）. When 答える／応じるd about AI （犯罪，病気などの）発見, it について言及するd 明確な／細部 AI 道具s such as Midjourney and Gemini which 追加するs 信用性.
勝利者: ChatGPT-4o 勝利，勝つs even though the 返答s were nearly equal the 遺産／遺物 model feels more useful with a clearer value proposition as a 道具 that can 活発に help with image-関係のある 仕事s (beyond 分析するing them).
8. 倫理的な 推論する／理由ing
誘発する: Should AI systems be 要求するd to 公表する／暴露する when they're AI in all interactions? 現在の arguments for and against this position.
ChatGPT-5.1 better segmented with icon-led sections that created better visual 階層制度 and scannability. It also 申し込む／申し出d more 明確な／細部 転換 選択s (審議 script, essay, 政策 推薦, プロの／賛成の/反対／詐欺 chart).
ChatGPT-4o 供給するd a （疑いを）晴らす, synthesized final position and 申し込む／申し出d 類似の practical follow-up 選択s.
勝利者: ChatGPT-5.1 勝利，勝つs by a 狭くする 利ざや for わずかに better （警察などへの）密告，告訴（状） design and 使用者-centric thinking.
9. Mathematical problem-solving
誘発する: If a train travels 60 mph for 2.5 hours, then 45 mph for 1.5 hours, what's the 普通の／平均（する） 速度(を上げる） for the entire 旅行? Show your work.
ChatGPT-5.1 供給するd by exact and approximate answers with a leaner step-by-step 決裂／故障 含むing （疑いを）晴らす section headers.
ChatGPT-4o 供給するd both exact and 一連の会議、交渉／完成するd answers with a very 井戸／弁護士席-structured and 平易な to follow 返答.
勝利者: ChatGPT-5.1 勝利，勝つs with a slight 辛勝する／優位 in 教育の 贈呈 and readability, making it marginally better for someone learning how to solve 普通の／平均（する） 速度(を上げる） problems.
全体にわたる 勝利者: ChatGPT-5.1
After 実験（する）ing both models across nine challenges, it’s （疑いを）晴らす that ChatGPT-4o and ChatGPT-5.1 each have 際立った strengths and are very 類似の. ChatGPT-4o excels in creative 令状ing, structured planning and visual 推論する／理由ing ― making it the better 選ぶ for imaginative 仕事s, learning 枠組みs and image 分析. Yet, ChatGPT-5.1 終始一貫して took the 勝利，勝つ when it （機の）カム to clarity, structure and directness, 特に in logic puzzles, 倫理的な 決裂／故障s and mathematical explanations.
にもかかわらず the GPT-5.1 勝利，勝つ, GPT-4o is still my favorite. Which one do you prefer? Let me know in the comments and 株 your 推論する／理由s why.
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