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7 AI stories from May 25-26, 2026: Anthropic Mythos surfaces in Claude Code, xAI launches Grok Build CLI, Pope Leo XIV AI encyclical, and four more product and industry updates.

· by Pondero Newsdesk · 7 stories

AI news daily brief: 2026-05-26

Seven stories from May 25-26, 2026: one restricted model leak, one coding agent launch, one papal encyclical on AI governance, one compute infrastructure deal in talks, one search ranking update, one workforce restructuring, and one batch of productivity integrations.

Anthropic Mythos model toggle surfaces briefly in Claude Code and Claude Security

On May 25, 2026, users reported seeing a toggle labeled "Mythos" appearing in the public Claude Code and Claude Security interfaces, with the model string identified as claude-mythos-1-preview. Anthropic removed the toggle from both surfaces within hours. Anthropic originally announced Claude Mythos Preview on April 7, 2026, at the time stating the model would not be made publicly available. Per Anthropic's red-team blog at red.anthropic.com, the company now says it looks forward "to making Mythos-class models available through a general release" once it has developed "far stronger safeguards." Mythos is described by Anthropic as its highest-capability model. Anthropic has not confirmed whether a Claude Code integration would be gated by subscription tier. Read more: Anthropic red-team blog, BleepingComputer.

xAI launches Grok Build CLI beta for SuperGrok and X Premium Plus subscribers

xAI published Grok Build on May 25, 2026, as a CLI-based coding agent for SuperGrok and X Premium Plus subscribers. Users install the tool with a single curl command into a terminal session. Per xAI's announcement, Grok Build runs in two modes: plan mode, where users review and comment on AI-generated steps before execution begins, and execute mode, where approved changes show up as clean diffs. Per xAI, the tool supports MCP servers, custom plugins, hooks, and subagents that run in parallel for larger tasks. xAI noted that Grok Build reads Claude Code instruction files and the AGENTS.md format used by other tools. The product is in beta as of launch. Read more: xAI announcement.

Pope Leo XIV releases first encyclical calling AI development an epochal challenge for human dignity

Pope Leo XIV published his first encyclical, titled "Magnifica Humanitas: On Safeguarding the Human Person in the Time of Artificial Intelligence," on May 25, 2026. The document carries a signature date of May 15, the 135th anniversary of Pope Leo XIII's labor encyclical "Rerum Novarum." Per Vatican News, the encyclical addresses human dignity, the future of work, truthfulness in AI-generated content, autonomous weapons, and the concentration of power in AI systems. The document does not call for an AI moratorium. It frames responsible AI development as a moral obligation and calls for international governance structures. The Pope warned against allowing technology to be controlled by only a few, citing the principle of universal destination of goods. Read more: Vatican News.

Anthropic and Microsoft in early talks to add Maia 200 chip as a third compute source

Anthropic is in early talks to use Microsoft's Maia 200 custom AI chip on Azure, CNBC confirmed on May 21, 2026, citing a person familiar with the matter who asked not to be named. No deal has been signed. Microsoft announced the Maia 200 in January 2026 but has not yet made it available to external Azure customers. Per CNBC, Microsoft CEO Satya Nadella said on the company's April earnings call that Maia 200 offers more than 30% better tokens per dollar compared with current silicon in Microsoft's fleet. Anthropic already has a 10-year AWS arrangement worth more than $100 billion using Trainium chips, per CNBC, and also relies on Google Cloud. Microsoft invested $5 billion in Anthropic and Anthropic committed to spending $30 billion on Azure, per the same report. Both companies declined to comment. Read more: CNBC.

Google May 2026 core update finishes rollout over the weekend

Google's May 2026 broad core update completed its rollout over the weekend of May 24-25, 2026, per Search Engine Roundtable tracking of Google's Search Status Dashboard. The update began rolling out around May 22. It follows the March 2026 core update. Google has not published specific guidance on what the update targeted, consistent with its standard practice. Early signals from webmaster communities show higher volatility for AI-assisted content sites compared with editorially controlled sites. Google has not confirmed whether the update incorporated any new signals related to Google AI Mode, which launched at I/O 2026. Read more: Search Engine Roundtable.

ClickUp cuts 22 percent of staff and introduces million-dollar salary bands for AI-era roles

ClickUp CEO Zeb Evans announced on May 21, 2026, that the company would cut 22 percent of its workforce. Per TechCrunch's May 25 analysis, Evans framed the decision as a structural bet on AI rather than cost-cutting. The company has deployed approximately 3,000 internal AI agents across departments, per a Fortune report cited by TechCrunch. Evans described the new structure as a "100x org" and said salary bands would reach $1 million per year in cash for employees who remain and create outsized impact using AI. ClickUp was last valued at $4 billion in 2021, per TechCrunch. Evans told TechCrunch the company is measuring productivity gains from its agent deployment and plans to offer a related product to customers. Read more: TechCrunch.

xAI adds Vercel, Canva, Gamma, and S&P Global connectors to Grok

On May 22, 2026, xAI rolled out four new third-party connectors for Grok: Vercel (build and deploy websites), Canva (create and edit designs), Gamma (build presentations), and S&P Global (pull live market data), per a May 22 announcement captured by Digg. The new connectors join existing Grok integrations including Google Drive, Gmail, Outlook, SharePoint, Microsoft Teams, and Salesforce, per xAI's connector documentation. xAI has not published a timeline for additional connectors. Read more: Digg summary, xAI connector docs.

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