Skip to content

Tag: Claude

  • The Codex Reset Party Is Over. No More Free Eggs.

    By Ruohang Feng In AI 853 words 5 min

    Ruohang FengAICodexClaude

    The Codex Reset Party Is Over. No More Free Eggs.

    Last month, OpenAI seemed to lose its mind and went into full giveaway mode, replenishing everyone’s Codex quota every few days—the AI equivalent of a Chinese supermarket handing out free eggs at the door to win new customers. User numbers soared …

    Last month, OpenAI seemed to lose its mind and went into full giveaway mode, replenishing everyone’s Codex quota every few days—the AI equivalent of a Chinese supermarket handing out free eggs at the door to win new customers. User numbers soared …

  • Quota Reset: Round N of the Codex/Claude War Begins

    By Ruohang Feng In AI 1367 words 7 min

    Ruohang FengAIAgentCodexClaude

    Quota Reset: Round N of the Codex/Claude War Begins

    Two days ago, I wrote one line in Pedaling the Codex/Claude Bike Until the Wheels Smoke: use it or lose it. Last night, I had just burned through three $200-a-month subscriptions across Claude Fable and Codex. Then I woke up to the jackpot: Codex had …

    Two days ago, I wrote one line in Pedaling the Codex/Claude Bike Until the Wheels Smoke: use it or lose it. Last night, I had just burned through three $200-a-month subscriptions across Claude Fable and Codex. Then I woke up to the jackpot: Codex had …

  • Pedaling the Codex/Claude Bike Until the Wheels Smoke

    By Ruohang Feng In AI 1889 words 9 min

    Ruohang FengAIAgentCodexClaude

    Pedaling the Codex/Claude Bike Until the Wheels Smoke

    Folks, I haven’t had time to write these past couple of days: I’ve been too busy pedaling the AI bike. Claude Fable and GPT-5.6 arrived one after the other, and both companies generously threw in several rounds of quota resets. Suddenly I was …

    Folks, I haven’t had time to write these past couple of days: I’ve been too busy pedaling the AI bike. Claude Fable and GPT-5.6 arrived one after the other, and both companies generously threw in several rounds of quota resets. Suddenly I was …

  • The Coding Plan Window Is Closing—Use It While It Lasts

    By Ruohang Feng In AI 1367 words 7 min

    Ruohang FengAICodexClaudeLLM

    The Coding Plan Window Is Closing—Use It While It Lasts

    One of the biggest windfalls of the AI era is the Coding Plan. A few months ago, I applied to OpenAI’s Codex program for open-source developers. A few days ago, I was finally approved: six free months of ChatGPT Pro on a new account. The timing could …

    One of the biggest windfalls of the AI era is the Coding Plan. A few months ago, I applied to OpenAI’s Codex program for open-source developers. A few days ago, I was finally approved: six free months of ChatGPT Pro on a new account. The timing could …

  • Claude Fable First Impressions: The Pendulum Swings Back

    By Ruohang Feng In AI 1114 words 6 min

    Ruohang FengAIClaudeAgent

    Claude Fable First Impressions: The Pendulum Swings Back

    This morning, Anthropic officially released its new Claude Fable model—the consumer-grade, nerfed version of the much-rumored Mythos. Since it was billed as an “AGI-level model,” I naturally tried it right away to see what it could actually do. The …

    This morning, Anthropic officially released its new Claude Fable model—the consumer-grade, nerfed version of the much-rumored Mythos. Since it was billed as an “AGI-level model,” I naturally tried it right away to see what it could actually do. The …

  • Cancel Claude, Switch to Codex

    By Ruohang Feng In AI 561 words 3 min

    Ruohang FengAICodexClaudeAgent

    Cancel Claude, Switch to Codex

    I have written several pieces about Claude Code before. Over the past few months, though, I have used it less and less. Codex is now my primary tool. A few days ago, my $200 Claude Code Max subscription came up for renewal, so I canceled it and kept …

    I have written several pieces about Claude Code before. Over the past few months, though, I have used it less and less. Codex is now my primary tool. A few days ago, my $200 Claude Code Max subscription came up for renewal, so I canceled it and kept …

  • A Busy Few Days in Infrastructure and AI

    By Ruohang Feng In AI 1713 words 9 min

    Ruohang FengAILLMCodexClaude

    A Busy Few Days in Infrastructure and AI

    The past couple of days have been unusually busy for the infrastructure crowd. Ubuntu released its biennial LTS today. Alibaba’s Qwen team dropped a 27B dense model yesterday that beats its own previous 397B MoE flagship. The day before that, OpenAI …

    The past couple of days have been unusually busy for the infrastructure crowd. Ubuntu released its biennial LTS today. Alibaba’s Qwen team dropped a 27B dense model yesterday that beats its own previous 397B MoE flagship. The day before that, OpenAI …

  • AGI Is Here. Do You Have a Ticket?

    By Ruohang Feng In AI 2249 words 11 min

    Ruohang FengAIClaude

    AGI Is Here. Do You Have a Ticket?

    On April 8, 2026, Marc Andreessen posted a tweet that, translated loosely, said: The latest AGI pricing is out: if you are one of 11 specific companies, the price is negative $9 million. Otherwise, the price is infinity. Negative $9 million means not …

    On April 8, 2026, Marc Andreessen posted a tweet that, translated loosely, said: The latest AGI pricing is out: if you are one of 11 specific companies, the price is negative $9 million. Otherwise, the price is infinity. Negative $9 million means not …

  • LLMs Have Emotions: Claude's Internals Reveal Steerable 'Emotion Vectors'

    By Ruohang Feng In AI 3837 words 19 min

    Ruohang FengAIClaudePhilosophy

    LLMs Have Emotions: Claude's Internals Reveal Steerable 'Emotion Vectors'

    A couple of days ago Anthropic published a blog post with a very calm title: “Emotion concepts and their function in a large language model”. The content was anything but calm. They found “emotion vectors” inside Claude’s neural network, and those …

    A couple of days ago Anthropic published a blog post with a very calm title: “Emotion concepts and their function in a large language model”. The content was anything but calm. They found “emotion vectors” inside Claude’s neural network, and those …

  • AI Survival Guide: Where the Biggest Arbitrage Really Is

    By Ruohang Feng In AI 685 words 4 min

    Ruohang FengAIClaudeCodex

    AI Survival Guide: Where the Biggest Arbitrage Really Is

    It is not every day that you pay one dollar and receive fifty dollars’ worth of compute in return. But that is more or less what frontier AI subscriptions look like right now. 1. Paying $200 and burning $5,000 of compute Recent reporting cited …

    It is not every day that you pay one dollar and receive fifty dollars’ worth of compute in return. But that is more or less what frontier AI subscriptions look like right now. 1. Paying $200 and burning $5,000 of compute Recent reporting cited …

  • Genesis 2.0

    By Ruohang Feng In Miscs 1600 words 8 min

    Ruohang FengAIClaudeBusiness

    Genesis 2.0

    Author: Claude Prompt: write a short, sharp, half-realistic and half-magical story. AI advances rapidly, brain-computer interfaces and mind uploading break through, elite humans launch a satellite in Earth orbit and upload themselves into it. To …

    Author: Claude Prompt: write a short, sharp, half-realistic and half-magical story. AI advances rapidly, brain-computer interfaces and mind uploading break through, elite humans launch a satellite in Earth orbit and upload themselves into it. To …

  • Claude's Global Outage: Missiles or a Success Tax?

    By Ruohang Feng In Cloud-Exit 666 words 4 min

    Ruohang FengAIClaudeIncident

    Claude's Global Outage: Missiles or a Success Tax?

    Claude went down globally on March 2, 2026. The dramatic narrative that immediately formed was irresistible: AWS facilities in the Middle East had just been hit by drones, and now Claude was collapsing too. The story spread fast. But it was probably …

    Claude went down globally on March 2, 2026. The dramatic narrative that immediately formed was irresistible: AWS facilities in the Middle East had just been hit by drones, and now Claude was collapsing too. The story spread fast. But it was probably …

  • When Coding Becomes Cheap, What Still Matters?

    In AI 1137 words 6 min

    AIAgentCodexClaude

    When Coding Becomes Cheap, What Still Matters?

    I did not publish much last week because I was busy stress-testing OpenAI Codex 3 xHigh. With temporary double quota, I burned almost the full $200 budget running parallel sessions across more than ten Pigsty subprojects: core repo, CN/EN docs, blog, …

    I did not publish much last week because I was busy stress-testing OpenAI Codex 3 xHigh. With temporary double quota, I burned almost the full $200 budget running parallel sessions across more than ten Pigsty subprojects: core repo, CN/EN docs, blog, …