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Anthropic's Claude Opus 4.7 faces user backlash over performance decline and security concerns

Anthropic has released Claude Opus 4.7, which shows mixed performance compared to competitors like Gemini and GPT 5.4. Users report significant frustration, claiming the model has been "nerfed" and exhibits decreased reasoning capabilities, leading to a decline in its usefulness for coding and complex tasks. Concerns are also being raised about potential security risks associated with Anthropic's "Mythos" tool, prompting calls for greater regulatory oversight. AI

Summary written by gemini-2.5-flash-lite from 12 sources. How we write summaries →

IMPACT User dissatisfaction with Claude Opus 4.7 suggests a potential shift in market dynamics and highlights the growing importance of model reliability and security.

RANK_REASON New model release from a major AI lab accompanied by significant user complaints and emerging security concerns.

Read on AI Explained →

Anthropic's Claude Opus 4.7 faces user backlash over performance decline and security concerns

COVERAGE [12]

  1. AI Explained TIER_1 · AI Explained ·

    Claude Opus 4.7 - A New Frontier, in Performance … and Drama

    Claude Opus 4.7 just dropped, but behind every headline lies a deeper story. From a bonanza of benchmarks, to seeing the fruits of one of the biggest mega-projects in US history, to sneaky Mythos disclaimers, to Anthropic admitting compute restraints and, forcing lower capability…

  2. Mastodon — sigmoid.social TIER_1 · [email protected] ·

    'TrustFall' Convention Exposes Claude Code Execution Risk # ai # risk # hacking # ki # repository # claude # gemini # llm # supplychain # trustfall # attack htt

    'TrustFall' Convention Exposes Claude Code Execution Risk # ai # risk # hacking # ki # repository # claude # gemini # llm # supplychain # trustfall # attack https://www. darkreading.com/application-se curity/trustfall-exposes-claude-code-execution-risk

  3. Mastodon — sigmoid.social TIER_1 · [email protected] ·

    Anthropic Mythos: supposedly so good at finding security flaws it might be "too dangerous to use" Anthropic Claude: so riddled with critical security flaws (and

    Anthropic Mythos: supposedly so good at finding security flaws it might be "too dangerous to use" Anthropic Claude: so riddled with critical security flaws (and obvious to anyone competent) it actuallly *is* too dangerous to use # AI

  4. Mastodon — fosstodon.org TIER_1 日本語(JA) · [email protected] ·

    Will Anthropic's "Mythos" Be a Turning Point for Cybersecurity? | WIRED.jp https://www.yayafa.com/2793804/ #AgenticAi #AI #Anthropic #Anthropic /Anthropic #ArtificialGeneralIntelligence

    Anthropicの「Mythos」はサイバーセキュリティの転機となるか | WIRED.jp https://www. yayafa.com/2793804/ # AgenticAi # AI # Anthropic # Anthropic /アンソロピック # ArtificialGeneralIntelligence # ArtificialIntelligence # Claude /クロード # エージェント型AI # サイバーセキュリティ /CyberSecurity # セキュリティ /Security # ハッカー /Hacker # 人…

  5. r/Anthropic TIER_1 · /u/Gabelawn ·

    How many are feeling this sense of betrayal?

    <!-- SC_OFF --><div class="md"><p>When I started using Claude last year, it was a revelation, miles better than the sycophantic, sociopathic OpenAI, in most respects far superior to Gemini (with it's bizarre, stubborn fixations). ​</p> <p>I used it for coding; I used it for brain…

  6. r/Anthropic TIER_1 · /u/Needsupgrade ·

    Man opus is so utterly dumb now it's like sonnet 3.5 or something. How long until they stop throttling down the inference? I might have to switch because even though opus was superior model, others have begun beating it because they actually still have reasoning intact.

    <!-- SC_OFF --><div class="md"><p>Anyone else experiencing this damn near unusable level of dumb in the model. </p> <p>What's the best model for real world usage right now?</p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/user/Needsupgrade"> /u/Ne…

  7. r/Anthropic TIER_1 · /u/darweth ·

    Question regarding complaints about Opus 4.7 and yadda yadda - if I'm not coding/building/creating something do I even have to worry about these issues? Honestly, Sonnet does most of I use Claude for quite capably. I often notice Opus does worse. Maybe because I don't prep it as thoroughly always.

    <!-- SC_OFF --><div class="md"><p>For those of us who use Claude mainly for research on philosophy, history, religion, reviewing and enhancing or finding holes in TTRPG crap, does any of this have much of an impact? I rarely feel the need to use Opus for anything. I just use Sonn…

  8. Mastodon — mastodon.social TIER_1 · [email protected] ·

    Regulators lag banks in AI as Anthropic’s Mythos raises oversight concerns Regulators and global standard‑setting bodies have stepped up warnings about the risk

    Regulators lag banks in AI as Anthropic’s Mythos raises oversight concerns Regulators and global standard‑setting bodies have stepped up warnings about the risks posed by the rollout of AI across the financial sector. # Economy # Tech # Anthropic # ArtificialIntelligence https://…

  9. Mastodon — mastodon.social TIER_1 · [email protected] ·

    AI stocks tumble following report over OpenAI’s growth targets OpenAI CFO Sarah Friar expressed concerns to other leaders over the company's ability to pay for

    AI stocks tumble following report over OpenAI’s growth targets OpenAI CFO Sarah Friar expressed concerns to other leaders over the company's ability to pay for future computing contracts if revenue did not grow fast enough, the report said. # Economy # Tech # AI # OpenAI https://…

  10. Mastodon — mastodon.social TIER_1 · [email protected] ·

    Regulators lag banks in AI as Anthropic’s Mythos raises oversight concerns Regulators and global standard‑setting bodies have stepped up warnings about the risk

    Regulators lag banks in AI as Anthropic’s Mythos raises oversight concerns Regulators and global standard‑setting bodies have stepped up warnings about the risks posed by the rollout of AI across the financial sector. # Economy # Tech # Anthropic # ArtificialIntelligence https://…

  11. Mastodon — mastodon.social TIER_1 · [email protected] ·

    Mythos # AI is such a security threat that it won't be released to the public. So who is going to be using it? https://www. theguardian.com/technology/202 6/apr

    Mythos # AI is such a security threat that it won't be released to the public. So who is going to be using it? https://www. theguardian.com/technology/202 6/apr/22/what-is-anthropic-mythos-ai-threat-global-cybersecurity # ArtificialIntelligence

  12. Mastodon — mastodon.social TIER_1 · DrMikeWatts ·

    Mythos # AI is such a security threat that it won't be released to the public. So who is going to be using it? https://www. theguardian.com/technology/202 6/apr

    Mythos # AI is such a security threat that it won't be released to the public. So who is going to be using it? https://www. theguardian.com/technology/202 6/apr/22/what-is-anthropic-mythos-ai-threat-global-cybersecurity # ArtificialIntelligence