OpenAIは、ThinkingとProのバリエーションを含むGPT-5.4をリリースし、エージェント的タスクと知識労働の改善を目指す。このアップデートは、コンピュータ使用機能の強化と事実誤認の減少を特徴とし、米国防総省との契約論争後のAnthropicとの競争の中で行われた。モデルは有料ユーザーと開発者に即時提供される。
2026年3月5日、OpenAIは加速したリリーススケジュールの一環として、GPT-5.4 ThinkingとGPT-5.4 Proを含む新しいモデルファミリーGPT-5.4をリリースした。これは今週初めにGPT-5.3 Instantが発売されたのに続く。同社はGPT-5.4を、コンピュータ使用タスク向けに明示的に設計された初のモデルと位置づけ、デスクトップやアプリケーションのスクリーンショットに基づいてキーボードとマウス入力を発行可能にした。多アプリ操作をサポートし、コーディング、データ分析、AIエージェントの監督などのエージェント的活動に最適化され、計算能力とコストの効率が向上している。
X上でのOpenAIのGPT-5.4リリースに対する反応は、強化された推論、コーディング、エージェントワークフロー、知識労働向けコンピュータ使用機能への興奮と、エンタープライズ重視、高コスト、パーソナリティ退行、ベンチマーク対実世界性能への懐疑という批判が混在している。
BREAKING: @OpenAI just released GPT-5.4 and it is AMAZING.
— Dan Shipper 📧 (@danshipper) 5. maaliskuuta 2026
We spent a week @every putting it through real engineering tasks from code reviews to planning workflows and using it inside of our @openclaw setups.
The verdict: OpenAI is back in the coding race.
- Its planning…
I've been testing GPT-5.4 for the last week.
— Matt Shumer (@mattshumer_) 5. maaliskuuta 2026
In short, it is the best model in the world, by far.
It's so good that it's the first model that makes the “which model should I use?” conversation feel almost over.
The biggest surprise: I barely use Pro anymore!
If you know me,… pic.twitter.com/9ChoYf17cr
It finally happened-my personal move 37 or more. I am deeply impressed. The solution is very nice, clean, and feels almost human. While testing new models in the last few weeks, I felt this coming, but it's an eerie feeling to see an algorithm solve a task one has curated for… https://t.co/Enwz7dPYkL
— Bartosz Naskręcki (@nasqret) 5. maaliskuuta 2026
GPT-5.4 is out. I've been playing with it for the last week, and here's my honest take 👇
— claire vo 🖤 (@clairevo) 5. maaliskuuta 2026
What I love:
- Speaks more like a human than 5.2/5.3
- 1m token context window
- tool use is :chefs-kiss: first model where i've experienced a true "go investigate and fix" experience that…
OpenAI feels focused on enterprise only now. They have codex for the devs and they’re also giving ChatGPT to the devs too. All they seem to care about is speed, reasoning and treating the remaining users like kids. Hurry up and release 5.4 thinking so I can just make my point and…
— Donna.exe (@_EdgeOfTheWeb) 5. maaliskuuta 2026
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On February 5, 2026, Anthropic and OpenAI simultaneously launched products shifting users from chatting with AI to managing teams of AI agents. Anthropic introduced Claude Opus 4.6 with agent teams for developers, while OpenAI unveiled Frontier and GPT-5.3-Codex for enterprise workflows. These releases coincide with a $285 billion drop in software stocks amid fears of AI disrupting traditional SaaS vendors.
OpenAI has released a new AI model, GPT-5.4-Cyber, exclusively to verified cybersecurity professionals. The fine-tuned version of its GPT-5.4 model aims to test defenses against jailbreaks and adversarial attacks. This move follows Anthropic's recent announcement of its own powerful model.
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Google has released Gemini 3.1 Pro, an updated version of its flagship AI model, emphasizing improvements in problem-solving and reasoning. The model is available in preview for developers and consumers starting today. It builds on the Gemini 3 release from November.
OpenAI has released ChatGPT 5.4, which includes new features focused on spreadsheets. The update brings specialized tools for Microsoft Excel and Google Sheets. This development highlights an emphasis on productivity applications.
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OpenAI has officially discontinued its GPT-4o model for ChatGPT on February 13, 2026, following an announcement in January. The move shifts focus to newer versions like GPT-5.2, though a small group of users is expressing grief and pushing for restoration through the #keep4o campaign.
OpenAI is developing a desktop superapp that merges its ChatGPT chatbot, Codex coding platform and Atlas browser to improve user experience. The initiative, led by applications CEO Fidji Simo, aims to simplify efforts amid a focus on core products. This follows recent announcements of smaller GPT-5.4 models.
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Anthropic has launched Claude Opus 4.7, a new AI model designed to assist developers with complex coding tasks. The company emphasized its improved instruction-following and memory capabilities. This release follows the earlier announcement of the more advanced Claude Mythos Preview.