タグ: OpenAI

When OpenAI released GPT-4o in 2024, it was widely praised for its creativity, speed, and emotional warmth. For many, it felt like a breakthrough in AI interaction—lively, expressive, and deeply human-like. Then, almost overnight, GPT-4o vanished from the ChatGPT interface, replaced by GPT-5, which—despite major upgrades—has left a significant part of the user base feeling cold, alienated, and frustrated. This article covers why this shift has upset so many users, what GPT-5 does differently, and most importantly, how to keep using GPT-4o today—even if OpenAI no longer features it in ChatGPT. Why People Are Upset About GPT-5 Users feel misledOpenAI had previously implied GPT-4o would stick around. But it disappeared […]

OpenAI just dropped GPT-5, the most anticipated AI model release of 2025. After months of speculation and hype surrounding what many expected to be a revolutionary leap toward artificial general intelligence, the company has finally unveiled its latest flagship model. With ChatGPT now serving 700 million weekly users worldwide, the pressure was on OpenAI to deliver something truly groundbreaking. GPT-5 arrives as a unified system rather than a single model, designed to automatically choose the right approach for each task. Sam Altman positioned this release as bringing “a team of PhD-level experts in your pocket,” promising significant improvements in reasoning, coding, health advice, and creative tasks. The lineup includes multiple […]

OpenAI just dropped its first open-weight models since GPT-2 — a big move that shifts its usual strategy. Announced on August 5, the new models, called gpt-oss, are fully open-source under the Apache 2.0 license. That means anyone can download them, tweak them, and run them locally without any restrictions. This release comes as open-source AI is gaining momentum, with players like Meta and Mistral pushing strong alternatives. gpt-oss includes two models: Both are optimized to run directly on local hardware — no internet, no API needed — and still support features like chain-of-thought reasoning, tool use, and large context windows. While OpenAI continues to build out its paid API offerings, […]

On July 17, OpenAI has unveiled ChatGPT Agent—a general-purpose AI assistant that not only talks but acts. More than just a chatbot, this new system can autonomously browse websites, use APIs, manipulate spreadsheets, run code in a terminal, generate editable documents—and crucially, do all of this using its own virtual computer. While Silicon Valley has been buzzing for over a year about so-called AI agents—intelligent software that can perform multi-step tasks on your behalf—OpenAI’s rollout marks one of the first times that such capabilities are available to mainstream users. Starting this week, subscribers to ChatGPT Pro, Plus, and Team plans can activate Agent Mode to let the model plan their week, generate pitch decks, […]

Update — July 12, 2026: That browser shipped as ChatGPT Atlas in October 2025, and OpenAI is now shutting Atlas down on August 9, 2026. OpenAI is preparing to launch its own AI-powered web browser, reportedly arriving within weeks. Built on Chromium and tightly integrated with ChatGPT, the browser is designed to compete directly with Google Chrome and reshape how people interact with the web. This move is about more than user experience. It’s a strategic push to take control of the same data stream that fuels Google’s core business. Chrome, used by over 3 billion people, captures vast amounts of behavioral data—searches, clicks, and browsing patterns—all of which feed […]

Have you ever wondered what you’d look like with natural lock-curls, how you’d look 30 years older, or maybe what fashion style fits your facial features best? With the right prompt, you can upload your own photo and find out! From playful edits to professional-level transformations, AI can handle it all and you don’t even need any photo editing experience. But here’s the key: it all depends on how you write the prompt. A small change in wording can mean the difference between stunning and kinda off. The way you describe the look, the lighting, or even the background can guide the AI toward vastly different results — so precision […]

Most people use AI to create images from scratch. But here’s the twist: ChatGPT can now take your photo and instantly transform it into something jaw-dropping. Whether you want to turn a selfie into anime, your pet into a Pixar character, or your cityscape into a watercolor painting, ChatGPT’s GPT-4o native image generator can now do all of that. If you’ve tried this before and ended up with results that didn’t match what you imagined, you’re not alone. Often, the issue lies in the way the prompt is written. Even small wording changes can drastically affect what the AI generates. We’ve tested hundreds of popular styles and found the 10 […]

人工知能の次の進化がもうすぐそこまで来ている。オープンAIが開発したGPT-5は、これまでで最も高機能でインテリジェントなマルチモーダル言語モデルになりつつある。最近のOpenAIのポッドキャストで、CEOのサム・アルトマンは、「今年の夏以降」にリリースされる予定であることを明らかにした。しかし、具体的に何を期待すべきなのだろうか？GPT-5は、単にパラメータや生のパワーを増やしただけではない。受動的なテキストジェネレーターから、前例のない深さで推論し、適応し、行動を起こすことができる自律エージェントへと、AIシステムの設計と使用方法の根本的な転換を告げるものだ。この新世代は、モダリティ（テキスト、音声、画像、そしておそらく[...]）を横断して操作できるようになるだろう。

AI競争がかつてないほど過熱している。2025年5月現在、OpenAI、Anthropic、Google、xAIはいずれも最新のフラッグシップモデル、ChatGPT（GPT-4.5/4.1）、Claude 4（Claude 3.7 Sonnet）、Gemini 2.5 Pro、Grok 3を発表している。それぞれが、知能、創造性、推論、道具の使用における大きな飛躍を約束しており、今回の誇大宣伝は単なるマーケティングではない。これらのモデルは純粋により便利で、より有能で、多くの場合、衝撃的なほど優れている。しかし、疑問が残る。どれが実際にベストなのだろうか？答えは、あなたが何を求めているかによる。コーディングや技術的な作業を得意とするものもあれば、会話やリアルタイムの知識、巨大なドキュメントを扱うことを得意とするものもある。はっきりしているのは、私たちはついに[...]を手に入れたということだ。

2025年5月22日、AnthropicはClaude 4シリーズを発表した。この2つの次世代AIモデルは、バーチャルコラボレーターができることを再定義するように設計されている。クロード・オーパス4は、これまでで最もパワフルなモデルであり、クロード・ソネット4は、日常的な使用に最適化された、よりスリムで高速なオプションです。これらのモデルは共に、転換期を意味する。これまでのアップデートが漸進的な改良を加えてきたのに対し、クロード4は、推論し、記憶し、長期間にわたって自律的に動作するAIへの本格的な飛躍である。拡張されたツール使用、並列推論、実世界のコーディングベンチマークにおける記録破りのパフォーマンスにより、Claude 4は大規模言語モデルが達成できることの新たな基準を設定します。Claude 4 Sonnetは、最新の[...]とともに、Fello AIで利用できるようになりました。