Illustration comparing AI models: GPT-5.2 highlighted in the center with icy, warning visuals, flanked by GPT-4 on the left and Claude 4.5 on the right. The image emphasizes controversy around GPT-5.2, with a snowflake icon, warning symbol, and the text “Why Is GPT-5.2 So Controversial?” suggesting strong benchmarks but negative user reception.
AIニュース

GPT-5.2 Is a Monster on Benchmarks – So Why Do Users Hate It?

OpenAI is under real pressure again. In late 2025, Google’s Gemini 3 and Anthropic’s Claude Opus 4.5 closed what used to be a comfortable performance gap. Benchmarks tightened. User sentiment shifted. For the first time in years, OpenAI was no longer the unquestioned leader across reasoning, coding, and everyday usability at the same time. Just weeks after GPT-5.1 — and only a couple of months after GPT-5.0 — OpenAI shipped GPT-5.2. Internally, this followed what multiple reports describe as a “Code Red” moment: a company-wide push to improve ChatGPT’s competitiveness after Gemini 3 began outperforming OpenAI models on several internal and external evaluations. On paper, GPT-5.2 looks like a major […]

Thumbnail showing a glowing AI brain inside a central glass sphere with four colored orbs orbiting it, each containing logos representing GPT-5.1, Gemini 3, Grok 4.1 and Claude 4.5, above the headline text ‘The Best AI in November 2025?’ on a dark blue gradient background.
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The Best AI of November 2025: Gemini 3 vs GPT-5.1 vs Grok 4.1 vs Claude 4.5

TL;DR: November 2025 killed the “one chatbot for everything” era: Gemini 3 leads hard reasoning and Generative UI, GPT-5.1 balances a fast Instant mode with a deep Thinking mode, Grok 4.1 dominates EQ and real-time news, and Claude Sonnet 4.5 is the safest coder. Meanwhile, open-weights models like DeepSeek V3, Llama 4 and Qwen3 bring frontier-level intelligence to cheap APIs and consumer GPUs and multi-model hubs like Fello AI let you combine them all in a single app. If you don’t have time to read the full deep dive, here is the quick map based on our testing and the latest benchmarks. Best For Top Pick Why? Complex Science & […]

A minimalist illustration on an orange background showing a smiling cartoon man standing next to a friendly robot with a brain icon on its chest. Above them, the text reads “Claude Sonnet 4.5” in large font with the Anthropic logo. Below the characters, a bold banner states: “Here Is All You Need To Know.” The style is clean, flat, and simple, resembling retro comic art.
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AnthropicがClaude Sonnet 4.5を発表：コードと複雑なタスクのために構築されたフロンティアAI

2025年9月29日、Anthropicは最新のフロンティアAIモデルであるClaude Sonnet 4.5をリリースし、同社がこれまでに開発したモデルの中で最も能力が高く、最も整合性のあるモデルと位置づけた。このリリースは、これまでのクロード・ソネットとオーパスのリリースの基礎の上に構築されており、持続的な自律パフォーマンス、コーディング能力、ツールの使用、安全行動の測定可能な改善に焦点を当てています。Anthropicは、2ヶ月弱の社内テストの後、API、Amazon Bedrock、Google Vertex AIにおいてClaude Sonnet 4.5を本番稼動させました。 このモデルは現在、Claude.aiとAPIアクセスを通じてすべてのユーザーが利用可能で、間もなくFello AIに統合される予定です。その内容を詳しく見てみよう。