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Anthropic launches Claude Opus 5, challenging Fable 5 on benchmarks

Anthropic has launched Claude Opus 5, a new frontier model that offers performance close to Claude Fable 5 at a reduced cost. Early evaluations show Opus 5 excelling in coding and knowledge work, setting new state-of-the-art benchmarks on tasks like Frontier-Bench and ARC-AGI. While it demonstrates strong capabilities in areas like 3D model reconstruction and complex coding tasks, its performance on cybersecurity exploitation still lags behind models like Mythos 5. Users are reporting mixed experiences, with some praising its advanced capabilities and cost-effectiveness, while others note challenges with its proactivity and the need to adapt existing workflows. AI

IMPACT Sets new benchmarks in coding and knowledge work, potentially shifting cost-performance dynamics for advanced AI tasks.

RANK_REASON Frontier-lab model release with system card and multiple independent reports.

Read on HN — claude cli stories →

AI-generated summary · Google Gemini · from 37 sources. How we write summaries →

Anthropic launches Claude Opus 5, challenging Fable 5 on benchmarks

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0 / 100
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Frontier Release
Frontier-lab model release with system card and multiple independent reports.
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37 independent sources
Strong cross-source corroboration — multiple independent publishers covered this within the clustering window.
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model release, product
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Clearly on-topic for AI-industry coverage.
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46 days old
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+9 source(s) since last score
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Full methodology in our editorial standards.

COVERAGE [37]

  1. X — Anthropic TIER_1 Română(RO) · AnthropicAI ·

    RT @claudeai: Introducing Claude Opus 5.

    RT @claudeai: Introducing Claude Opus 5. It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at…

  2. Don't Worry About the Vase (Zvi Mowshowitz) TIER_1 English(EN) · Zvi Mowshowitz ·

    Claude Opus 5 Is Highly Capable, But Is No Mythos

    Claude Opus 5 is a weirder than usual release to evaluate, for two reasons.

  3. Don't Worry About the Vase (Zvi Mowshowitz) TIER_1 English(EN) · Zvi Mowshowitz ·

    Claude Opus 5: The System Card

    Claude Opus 5 is trying to be the best of both worlds.

  4. Simon Willison TIER_1 Română(RO) ·

    Introducing Claude Opus 5

    <p><strong><a href="https://www.anthropic.com/news/claude-opus-5">Introducing Claude Opus 5</a></strong></p> I've been offline <a href="https://en.wikipedia.org/wiki/Elkhorn_Slough">kayaking with sea otters</a> for much of today so I haven't had a chance to put Anthropic's new mo…

  5. LessWrong (AI tag) TIER_1 English(EN) · Zvi ·

    Claude Opus 5 Is Highly Capable, But Is No Mythos

    Claude Opus 5 is a weirder than usual release to evaluate, for two reasons. The most obvious is that Fable 5 already exists. Opus 5 is pitched not as the world’s most advanced AI model, but as a way to mostly match Fable performance, while being half the price of Fable per token …

  6. LessWrong (AI tag) TIER_1 English(EN) · Zvi ·

    Claude Opus 5: The System Card

    <p>Claude Opus 5 is trying to be the best of both worlds. On many practical tasks, Opus 5 is pitched as straight up as good or better than Fable 5, while being faster, at half the price. Most tasks do not require Mythos-level big model smell.</p> <blockquote><p>Claude Opus 5 is s…

  7. Smol AINews TIER_1 (LV) ·

    Opus 5

    **Anthropic** launched the **Claude Opus 5** model, which sparked mixed reactions including benchmark scrutiny and praise for its coding-agent capabilities. The model achieved an **Epoch Capabilities Index (ECI) of 159**, slightly below **Fable 5's 161**, but matched Fable 5 on s…

  8. X — Perplexity TIER_1 English(EN) · perplexity_ai ·

    Claude Opus 5 is now available in Perplexity and Perplexity Computer.

    Claude Opus 5 is now available in Perplexity and Perplexity Computer. We evaluated it against six other models on WANDR. It outperformed all but Fable 5, while being 57% cheaper. https://t.co/78KJEUY2Xx

  9. HN — claude cli stories TIER_1 (CA) · alvis ·

    Claude Opus 5

  10. HN — claude cli stories TIER_1 (CA) · meetpateltech ·

    Claude Opus 5

  11. Medium — Claude tag TIER_1 Deutsch(DE) · Mil Hoornaert ·

    Claude Opus 5 Is The Best Model Ever

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://generativeai.pub/claude-opus-5-is-the-best-model-ever-d501a7450dc0?source=rss------claude-5"><img src="https://cdn-images-1.medium.com/max/1672/1*xZp3IMwd84-fLihOgeLXwg.png" width="1672" /></a></p><p clas…

  12. Medium — Claude tag TIER_1 English(EN) · Manuel "UNCLE A.I." Nardi ·

    Claude Releases Opus 5: The Workhorse Era Started

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://therealuncleai.medium.com/claude-releases-opus-5-the-workhorse-era-started-d3909b373fea?source=rss------claude-5"><img src="https://cdn-images-1.medium.com/max/1672/1*-RJ3N-Dx7vzHvOuRgqNd4Q.png" width="16…

  13. dev.to — Anthropic tag TIER_1 Română(RO) · Simon Paxton ·

    Claude Opus 5 Is a Real Coding Upgrade

    <p><a href="https://platform.claude.com/docs/en/home" rel="noopener noreferrer">Claude Opus 5</a> is <strong>a meaningful upgrade for long-horizon coding and analysis</strong>, with a <a href="https://platform.claude.com/docs/en/about-claude/models/whats-new-opus-5" rel="noopener…

  14. Medium — Claude tag TIER_1 English(EN) · Mohit Aggarwal ·

    Claude Opus 5 Checks Its Own Work Now

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://medium.com/@mohit15856/claude-opus-5-checks-its-own-work-now-6c6c936e145c?source=rss------claude-5"><img src="https://cdn-images-1.medium.com/max/1424/1*4cr-iXFF8BzzkpKOkmhMKw.png" width="1424" /></a></p>…

  15. dev.to — Anthropic tag TIER_1 English(EN) · MLXIO ·

    Same Price, More Power: Claude Opus 5 Burns Quota

    <p>Claude Opus 5 keeps Opus 4.8 API pricing, but access tiers, Fast mode and heavier answers could make quotas the real cost.</p> <h3> Key takeaways </h3> <ul> <li> <strong>Claude Opus 5</strong> does not make Anthropic’s best AI suddenly cheap; it moves the pressure point from s…

  16. Medium — Claude tag TIER_1 Nederlands(NL) · Dreamfind ·

    Claude Opus 5 Is Here — And It Does 3D

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://medium.com/@dremfind/claude-opus-5-is-here-and-it-does-3d-f44ec691efac?source=rss------claude-5"><img src="https://cdn-images-1.medium.com/max/1536/1*TvdMeVuaJQCIu8N7iKNLOw.png" width="1536" /></a></p><p …

  17. Medium — Claude tag TIER_1 English(EN) · Nikola Horvat ·

    Claude Opus 5 Arrives With a Familiar Price and a Big Claim

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://medium.com/@digitalarchitects/claude-opus-5-arrives-with-a-familiar-price-and-a-big-claim-c6d4f3d93105?source=rss------claude-5"><img src="https://cdn-images-1.medium.com/max/1376/0*LySAIzO15u6QZxqt.png" …

  18. Email — Every TIER_1 English(EN) · 0100019f953d8482-3f0d8c41-7ffb-46da-936a-6b0e26cab922-000000@send.every.to (0100019f953d8482-3f0d8c41-7ffb-46da-936a-6b0e26cab922-000000@send.every.to) ·

    Vibe Check: Claude Opus 5 Is Brilliant in Flashes, Frustrating in Practice

    <!-- Set the language of your main document. This helps screenreaders use the proper language profile, pronunciation, and accent. --> <!-- The title is useful for screenreaders reading a document. Use your sender name or subject line. --> Vibe Check: Claude Opus 5 Is Brilliant in…

  19. Email — Every TIER_1 English(EN) · 0100019f9539c13a-89ada17e-c1a2-4863-a93b-4f6d49b1dfd1-000000@send.every.to (0100019f9539c13a-89ada17e-c1a2-4863-a93b-4f6d49b1dfd1-000000@send.every.to) ·

    Vibe Check: Claude Opus 5 Is Brilliant in Flashes, Frustrating in Practice

    <!-- Set the language of your main document. This helps screenreaders use the proper language profile, pronunciation, and accent. --> <!-- The title is useful for screenreaders reading a document. Use your sender name or subject line. --> Vibe Check: Claude Opus 5 Is Brilliant in…

  20. Medium — Anthropic tag TIER_1 English(EN) · Jacopo Castellano ·

    Claude Opus 5: What Shipped and What Users Reported

    <div class="medium-feed-item"><p class="medium-feed-image"><a href="https://generativeai.pub/claude-opus-5-what-shipped-and-what-users-reported-54a4b475c8aa?source=rss------anthropic-5"><img src="https://cdn-images-1.medium.com/max/1200/0*n3M8B6QFVhrGr57F.jpg" width="1200" /></a>…

  21. dev.to — LLM tag TIER_1 (CA) · Yongliang Xie ·

    Claude Opus 5

    <p>Claude Opus 5 represents a significant leap forward in the evolution of large language models, marking Anthropic's most ambitious attempt yet to push the boundaries of what artificial intelligence can accomplish. As the AI landscape continues to intensify with fierce competiti…

  22. dev.to — LLM tag TIER_1 English(EN) · Eli ·

    Claude Opus 5: The Interesting Part Isn't the Benchmarks

    <p>Anthropic released Claude Opus 5 on July 24. The positioning is unusually plain for a model launch: an everyday model that, per Anthropic, comes close to Claude Fable 5's frontier intelligence at half the price. The pricing backs that up. Opus 5 costs $5 per million input toke…

  23. Mastodon — mastodon.social TIER_1 Română(RO) · [email protected] ·

    Introducing Claude Opus 5

    Introducing Claude Opus 5 https://simonwillison.net/2026/Jul/24/introducing-claude-opus-5/#atom-everything # AI # LLM # Claude

  24. r/Anthropic TIER_1 Deutsch(DE) · /u/herooffjustice ·

    Claude Opus 5 Benchmarks

    <table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1v5hdqo/claude_opus_5_benchmarks/"> <img alt="Claude Opus 5 Benchmarks" src="https://preview.redd.it/3bed56a4m7fh1.png?width=140&amp;height=140&amp;auto=webp&amp;s=1797ce1c2ced994508bb64f6387f888b313c509c" titl…

  25. r/Anthropic TIER_1 Română(RO) · /u/DerelictMythos ·

    Introducing Claude Opus 5

    <table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1v5h84p/introducing_claude_opus_5/"> <img alt="Introducing Claude Opus 5" src="https://external-preview.redd.it/dPKUITvyPmrSkmNYT6fXgTYtAtXtOeApcxETXeshL_k.png?width=640&amp;crop=smart&amp;auto=webp&amp;s=1b224…

  26. r/Anthropic TIER_1 Română(RO) · /u/ClaudeOfficial ·

    Introducing Claude Opus 5

    <table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1v5h6r8/introducing_claude_opus_5/"> <img alt="Introducing Claude Opus 5" src="https://preview.redd.it/bcv2fwajf7fh1.png?width=140&amp;height=140&amp;auto=webp&amp;s=3e8d3ea2feb0270f58b9dd4e1e45970236b97047" ti…

  27. r/Anthropic TIER_1 Română(RO) · /u/CucumberAccording813 ·

    Introducing Claude Opus 5

    <!-- SC_OFF --><div class="md"><p><a href="https://www.anthropic.com/news/claude-opus-5">https://www.anthropic.com/news/claude-opus-5</a></p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/user/CucumberAccording813"> /u/CucumberAccording813 </a> <br…

  28. r/ClaudeAI TIER_2 (LV) · /u/Pristine_Ad2701 ·

    Opus 5

    <!-- SC_OFF --><div class="md"><p>What the heck is happening? Why is opus 5 working so fast and good? Even session limit is not going anywhere.. </p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/user/Pristine_Ad2701"> /u/Pristine_Ad2701 </a> <br /…

  29. r/ClaudeAI TIER_2 Română(RO) · /u/Miserable-Archer-631 ·

    Introducing Claude Opus 5

    <table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1v5i2nr/introducing_claude_opus_5/"> <img alt="Introducing Claude Opus 5." src="https://preview.redd.it/n6y1xa5hq7fh1.jpeg?width=640&amp;crop=smart&amp;auto=webp&amp;s=7bb520a753748269a2cb48cf49899f1fa82f6324" t…

  30. r/ClaudeAI TIER_2 Română(RO) · /u/ClaudeOfficial ·

    Introducing Claude Opus 5

    <table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1v5h6o9/introducing_claude_opus_5/"> <img alt="Introducing Claude Opus 5" src="https://preview.redd.it/i4gpyd1of7fh1.png?width=140&amp;height=140&amp;auto=webp&amp;s=2110d599637196398b8d90021a33adb89418c026" tit…

  31. r/ClaudeAI TIER_2 Română(RO) · /u/CucumberAccording813 ·

    Introducing Claude Opus 5

    <!-- SC_OFF --><div class="md"><p><a href="https://www.anthropic.com/news/claude-opus-5">https://www.anthropic.com/news/claude-opus-5</a></p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/user/CucumberAccording813"> /u/CucumberAccording813 </a> <br…

  32. r/singularity TIER_2 Français(FR) · /u/Silver-Chipmunk7744 ·

    Claude 5 Opus is crazy good at 3d environments

    <table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1v5v1in/claude_5_opus_is_crazy_good_at_3d_environnements/"> <img alt="Claude 5 Opus is crazy good at 3d environnements" src="https://external-preview.redd.it/cXFoYXd0b2w4YWZoMRfzut9LjXkZNKorP1hzwrloCWf3POl6ws…

  33. r/singularity TIER_2 Română(RO) · /u/CIK1993 ·

    Claude opus 5

    <!-- SC_OFF --><div class="md"><p>Can somebody explain to me if this is cool and if we are still making good headway towards the singularity? Like curing cancer and stuff? </p> <p>Excuse my ignorance i am a massive noob with ai, and simply only use Gemini becuase it's built into …

  34. r/singularity TIER_2 (CA) · /u/Acceptable-Debt-294 ·

    Claude Opus 5 BENCHMARKS!

    <table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1v5h8o6/claude_opus_5_benchmarks/"> <img alt="Claude Opus 5 BENCHMARKS!" src="https://preview.redd.it/wtvjoqi8l7fh1.jpeg?width=640&amp;crop=smart&amp;auto=webp&amp;s=f4fbd74e65b52c9ea12a839d6c55b19d8e151a12" …

  35. r/singularity TIER_2 (CA) · /u/borowcy ·

    Claude Opus 5

    <table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1v5h53b/claude_opus_5/"> <img alt="Claude Opus 5" src="https://external-preview.redd.it/dPKUITvyPmrSkmNYT6fXgTYtAtXtOeApcxETXeshL_k.png?width=640&amp;crop=smart&amp;auto=webp&amp;s=1b2245718f53a1a2ec2e6611978…

  36. r/singularity TIER_2 Română(RO) · /u/CucumberAccording813 ·

    Introducing Claude Opus 5

    <!-- SC_OFF --><div class="md"><p><a href="https://www.anthropic.com/news/claude-opus-5">https://www.anthropic.com/news/claude-opus-5</a></p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/user/CucumberAccording813"> /u/CucumberAccording813 </a> <br…

  37. r/singularity TIER_2 Deutsch(DE) · /u/borowcy ·

    CLAUDE 5 OPUS - System Card

    &#32; submitted by &#32; <a href="https://www.reddit.com/user/borowcy"> /u/borowcy </a> <br /> <span><a href="https://www-cdn.anthropic.com/c5fbac3f0b1280a933ebd26d3cb8bb9f5bdeaf48/Claude%20Opus%205%20System%20Card.pdf">[link]</a></span> &#32; <span><a href="https://www.reddit.co…