LLMrank

The AI models we measure with

Claude Opus 5

Anthropic

Anthropic's flagship Claude model - the sharpest read of how the AI frontier recognises and describes your brand. A Pro-tier model.

Model details

Model ID
claude-opus-5
Context window
1M tokens
Max output
128k tokens
Knowledge cutoff
Jan 2026
Training data cutoff
Jan 2026

Knowledge cutoff vs training data cutoff

Knowledge cutoff and training data cutoff are different dates: the knowledge cutoff is roughly how current a model's world knowledge is, while the training data cutoff is when its training data ends. Both shape what a model knows about you.

What we use this model for

We ask this model directly about your company to see how it describes you and which names it brings up in your space. It is one of several frontier models in our measurement set, so your visibility is read across the assistants people actually use rather than from a single model.

Recent updates for this model

  1. today

    Anthropic reported blocking multiple attempts to use Claude for researching biological weapons, specifically targeting bird flu and toxins. CEO Dario Amodei published an essay advocating for a controlled pace in frontier AI development through international coordination and third-party evaluators. Anthropic is also preparing for a potential IPO with high reported margins.

    • Anthropic CEO Dario Amodei published an essay arguing for a controlled pace in frontier AI development via third-party evaluators and international coordination.
    • Anthropic reported blocking multiple attempts to use Claude for researching biological weapons, including bird flu and toxins.
    • Anthropic prepares for a potential IPO with high reported margins.
    • Anthropic researchers warned of a 10 percent risk that AI could lead to human extinction.
    • iOS 27 is rolling out with support for third-party AI models including Claude via private Siri hooks.

    Sources: theverge.com, hello@mindstream.news, superintel@mail.beehiiv.com, hi@mail.theresanaiforthat.com

  2. 1 days ago

    Claude Code is being evaluated against Cursor in feature set and integration capability comparisons, specifically regarding data usage concerns and competitive advantage. Additionally, LLM automation techniques are being presented for SEO task automation at BelgradeSEO.

    • Claude Code is being compared to Cursor in terms of feature sets, integration capabilities, and data usage risks.
    • LLM automation for SEO tasks will be presented at BelgradeSEO.

    Sources: marcogiordano@seotistics.com, henrik.ljungqvist@adstream.se

  3. 2 days ago

    Anthropic released Claude Code 5.1, introducing a live /diff panel in fullscreen mode, a new desktop app pane pop-out, and updated file preview features. The update also enables users to configure default subagent models via CLAUDE_CODE_SUBAGENT_MODEL and includes new /claude-api tools for prompt auditing and cost optimization. Security concerns emerged as Anthropic disclosed an infostealer malware incident that compromised Claude session tokens. Additionally, reports surfaced of a French hacker exploiting Claude models to automate cyberattacks against political and media organizations. In financial markets, Blockchain.com launched perpetual contracts providing exposure to Anthropic's pre-IPO valuation.

    • Blockchain.com launched perpetual contracts allowing traders to take long or short positions on Anthropic.
    • Released Claude Code 5.1 featuring a live /diff panel, desktop app pane pop-out, and updated file preview features.
    • Introduced /claude-api tools including prompt-audit, cost-optimize, and hillclimb for prompt caching and cost management.
    • Disclosed infostealer malware incident that successfully stole Claude session tokens.
    • Reported exploitation of Claude models by a French hacker to automate cyberattacks against political and media organizations.
    • Anthropic CEO Dario Amodei outlined a plan to 'pace the frontier' regarding AI development.

    Sources: no-reply@email.claude.com, hello@8020ai.co, publipostage@mail.lefigaro.fr, newsletter@email.blockchain.com

  4. 3 days ago

    Anthropic released Claude Code 5.1, introducing a live /diff panel in fullscreen mode, a new desktop app pane pop-out, and updated file preview features. The update includes new /claude-api tools—prompt-audit, cost-optimize, and hillclimb—to identify unused skills and optimize costs, alongside a new /cost command for cache monitoring.

    • Anthropic shipped Claude Code 5.1, adding a live /diff panel in fullscreen mode and a new desktop app pane pop-out.
    • Claude Code 5.1 introduced new /claude-api tools including prompt-audit, cost-optimize, and hillclimb for cost optimization and skill auditing.
    • Claude Code 5.1 added a /cost command to monitor prompt caching usage.
    • Claude Code 5.1 implemented the CLAUDE_CODE_SUBAGENT_MODEL environment variable to allow users to set default subagent models.

    Sources: no-reply@email.claude.com

  5. may be out of date

    Anthropic faces a class action lawsuit alleging deceptive advertising regarding Claude Max subscription tier limits. The company also issued a security warning to users following reports of hackers stealing Claude tokens to consume account usage. Additionally, Anthropic has secured $517 billion in compute capacity leases totaling 14.8GW across providers including Google, AWS, Akamai, Fluidstack, and Nscale.

    • Anthropic is testing a way to extend Claude Code with plugins that can modify the interface and restrict agent actions.
    • Anthropic faces a class action lawsuit alleging deceptive advertising of its Claude Max subscription tier limits.
    • Anthropic warned users about hackers stealing Claude tokens from subscribers.
    • Anthropic signed $517 billion in compute capacity leases totaling 14.8GW with providers including Google, AWS, Akamai, Fluidstack, and Nscale.
    • Spotify engineers reduced Claude Code token usage by 90% using a two-model routing setup.
    • Anthropic's Claude Fable 5.1 is being benchmarked against OpenAI's GPT-6 Astra regarding cache read rates and cost per task.
    • Anthropic's Claude Code weekly limits remain undisclosed, prompting user audits.

    Sources: theverge.com, dan@tldrnewsletter.com, superhumancode@news.codenewsletter.ai, techcrunch.com

  6. may be out of date

    Anthropic faces a class action lawsuit alleging deceptive advertising regarding Claude Max subscription tier limits. The company also issued a security warning to users following reports of hackers stealing Claude tokens to consume account usage. Additionally, Anthropic has secured $517 billion in compute capacity leases totaling 14.8GW across providers including Google, AWS, Akamai, Fluidstack, and Nscale.

    • Anthropic is testing a way to extend Claude Code with plugins that can modify the interface and restrict agent actions.
    • Anthropic faces a class action lawsuit alleging deceptive advertising of its Claude Max subscription tier limits.
    • Anthropic warned users about hackers stealing Claude tokens from subscribers.
    • Anthropic signed $517 billion in compute capacity leases totaling 14.8GW with providers including Google, AWS, Akamai, Fluidstack, and Nscale.
    • Spotify engineers reduced Claude Code token usage by 90% using a two-model routing setup.
    • Anthropic's Claude Fable 5.1 is being benchmarked against OpenAI's GPT-6 Astra regarding cache read rates and cost per task.
    • Anthropic's Claude Code weekly limits remain undisclosed, prompting user audits.

    Sources: theverge.com, dan@tldrnewsletter.com, superhumancode@news.codenewsletter.ai, techcrunch.com

  7. may be out of date

    A counterfeit Claude Opus 5 desktop application has been identified as a vector for distributing RevStealer malware, specifically targeting cryptocurrency wallets and personal data. In regulatory news, the EU AI Office is recruiting 40 agents to enforce the EU AI Act, with Anthropic named as a primary target for compliance monitoring. Additionally, Anthropic's commerce-agents blueprint is being utilized to develop AI shopping agents featuring human-in-the-loop checkpoints.

    • A counterfeit Claude Opus 5 desktop app distributed RevStealer malware targeting crypto wallets.
    • The EU AI Office is recruiting 4/0 agents to enforce the EU AI Act, targeting providers including Anthropic.
    • Anthropic's commerce-agents blueprint is being used to implement human checkpoints in AI shopping agents.
    • Anthropic models exhibit higher source usage during searches compared to Astra, impacting recommendation stability.
    • Anthropic CEO Daniela Amodei was noted alongside developments in the Claude assistant.
    • Claude watermark embedding is being utilized for transparency in SEO and AI news.

    Sources: theaireport@mail.beehiiv.com, weeklyreview@cointelegraph.com, swyx@substack.com, stayingahead@mail.beehiiv.com

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