Anthropic

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Anthropic Launches Claude Fable 5.1 and Claude Mythos 5.1

Mythos 5.1 is the version of Anthropic’s newest frontier model that almost nobody is allowed to use. In September 2026 the company announced Claude Fable 5.1 and Claude Mythos 5.1 together, and it is unusually direct about what separates them: nothing at all, except the safeguards wrapped around the weights. Fable 5.1 is generally available. […]

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New AI Tool: Claude Fable 5.1 Has Just Landed on AIxploria

Claude Fable 5.1 is now listed on AIxploria, the AI tools directory that catalogues thousands of AI sites across more than fifty categories. The new card sits at number one on the directory’s “Latest AI” feed, carries a Gold Verified badge, is priced “Paid”, and files Anthropic’s frontier model under LLM models and SuperTools. For […]

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Wonderful Agent Builder Creates and Refines Autonomous Agents Using Claude

Wonderful, the enterprise agent platform, launched Agent Builder — an autonomous AI agent powered by Anthropic’s Claude that creates, tests and refines other AI agents end to end. With build times down up to 50%, early production issues down 20%, more than 60 enterprise deployments and a $2 billion valuation reached within a year, this article unpacks how the Wonderful Agent Builder works, why Claude powers it, and what agents that build agents mean for enterprise AI teams.

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Claude iOS App Adds Usage Warning for Max Effort Mode

A TestingCatalog sighting on 1 September 2026 shows the Claude app for iOS displaying an explicit warning next to the Max effort option: it consumes 1.5x usage. This piece explains what the label says, how Claude’s five effort levels work, what a 1.5x multiplier does to five-hour and weekly usage limits on Pro, Max and Team plans, why Anthropic is printing the price on the dial now, how the approach compares with ChatGPT, Gemini and Perplexity, and when Max effort is actually worth paying for.

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Claude Hub Enters Early Access and Managed Projects Spotted on Mobile

App teardowns shared on 1 September 2026 show Anthropic’s unreleased Claude Hub feature transitioning from an internal flag to Early Access, while an empty tile for Managed Projects appears in the Claude mobile app’s layout code. This piece reconstructs the six-week trail of sightings, explains what Claude Hub and Managed Projects are, compares Anthropic’s orchestration bet with ChatGPT Projects and Gemini AI Rooms, reads the pricing-page clues about who gets access first, and sets out what businesses should prepare before agent orchestration ships.

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OpenAI, Anthropic, Google, and 100 Other Companies Call for Action to Defend Against Rogue AI

On 27 August 2026 OpenAI published an open letter titled “A call for collective action on cyber defense” and put 128 organisations behind it, including Anthropic, Google, Microsoft, AWS, IBM, Oracle and most of the cybersecurity industry. The letter argues that AI-enabled attacks are about to become far more widespread and that defenders have a window measured in months. This breakdown covers the three principles, the real signatory count, the sectors that turned out, the absences of Meta, Nvidia and Apple, the run of 2026 incidents that made the timing possible, the 32 discrete asks aimed at four audiences, what the document leaves out, the Daybreak and Mythos products sitting behind it, and the controls a mid-sized organisation should actually put in place this quarter.

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Frontier AI Access Is a Growing National Security Question for the UK

A University of Surrey white paper published on 27 August 2026 argues that frontier AI access has become part of UK national cyber defence — and that the June 2026 US export-control order, which forced Anthropic to disable Claude Fable 5 and Mythos 5 for every customer worldwide until 1 July, proved that access can be withdrawn without warning. This breakdown covers what Professor Alan Woodward and Dr Andrew Rogoyski actually argue, the NCSC’s measurement of a £65 automated attack, AISI’s 4.7-month capability doubling time, the five recommendations the paper sets out, why open-weight models are a weaker fallback than they look, and what UK organisations should put on their own risk registers.

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Anthropic Is Testing Hub Mode: A Task Orchestrator for Claude’s Sub-Agents

Anthropic is testing Hub Mode, an unannounced control surface for Claude’s sub-agents, spotted on 18 August 2026 as an internal toggle in the Claude mobile app and as a Hub destination in Claude Code on the web that promises to generate a task board. Enabling it changes nothing observable, and the planet icon beside it previously carried the name Orbit before that label was removed. This breakdown covers every observed string, the four orchestration primitives Anthropic already ships that a hub would sit on top of, the published limits behind them, what a task board would close that nothing else does, and what teams running agents at scale should do before it arrives.

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Visa Ships a Security AI That Patches Your Code Before Any Human Reviews It

Visa has open-sourced the Visa Vulnerability Agentic Harness, the tooling it used to hunt for bugs across its own payment network, and its documentation contains a line worth pausing on: “A plain scan edits your code.” In its default configuration the harness runs discovery, remediation and validation end to end, writing candidate fixes straight into source files before any person has looked at the finding or the patch. Nothing reaches production without a human, but nobody approves the patch before it is written. This breakdown covers the four-phase, eleven-stage pipeline, exactly where the “no human review” claim holds and where it collapses, what Visa itself says about oversight, and the independent evidence that only 26% of AI-generated security patches fix the flaw without changing what the software does.

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