Anthropic launches Claude Opus 4.8 as Mythos-class AI model nears public release
28 Sources
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Anthropic Says a Mythos-Class AI Model Will Be Available Soon
Expertise Artificial intelligence, home energy, heating and cooling, home technology. Anthropic's most capable generative AI model is still in the hands of a select few organizations and cybersecurity professionals, but the most powerful Claude model you can use now is getting an upgrade. Claude
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Claude's new model is more 'honest' when it messes up
Anthropic is releasing Claude Opus 4.8 on Thursday, and the company is touting the model's "honesty." According to Anthropic, it trains "all [its] models to be honest -- for instance, to avoid making claims that they can't support." But it notes that "a general problem with AI models is that they
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Anthropic launches Opus 4.8, with honesty as its killer feature
Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways * Claude Opus 4.8 promises more honest AI answers. * Dynamic workflows can run hundreds of Claude subagents. * Fast mode gets cheaper, while regular Opus pricing stays put. Diogenes was a fourth-century B.C. Greek
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Claude Opus 4.7 was just released last month, and 4.8 is already here with some massive improvements
* Anthropic just launched Claude Opus 4.8, upgrading 4.7 barely a month after its release. * Big gains: ~5 pts in agentic coding and ~8+ pts in agentic terminal coding. * Opus 4.8 is notably more honest -- flags uncertainty more and hallucinates less. If you ever need proof that the world of AI
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Anthropic to roll out Claude Mythos in coming weeks, launches Opus 4.8
May 28 (Reuters) - Anthropic on Thursday said it is launching an upgraded Claude Opus 4.8 model even as it works to release its powerful, market-moving Mythos model to all customers in the coming weeks. Mythos is the AI lab's large language model with advanced cybersecurity capabilities that have
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Anthropic Unveils Claude Opus 4.8, a New, More Powerful Model
The new system, called Opus 4.8, tops industry standard benchmarks in areas related to computer programming. Companies like Anthropic and OpenAI continue to sharpen the coding skills of their artificial intelligence technologies, with no ceiling in sight. On Thursday, Anthropic unveiled a new
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Anthropic's Claude Opus 4.8 is four times more honest, Mythos next
Anthropic has released Claude Opus 4.8, an upgrade to its flagship AI model that is four times less likely to let code flaws pass unremarked. The company also teased Mythos-class models, which have already found more than 10,000 critical software vulnerabilities through Project Glasswing, and
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Anthropic Debuts Claude Opus 4.8, Teases Upcoming Launch of 'Mythos-Class Models'
On Thursday, Anthropic launched Claude Opus 4.8, the latest and most advanced version of its flagship AI model. It's available everywhere at the same price as its predecessor, Opus 4.7 ($5 per million input tokens and $25 per million output tokens). Opus 4.8 boasts industry-leading scores on tasks
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Anthropic says Claude Opus 4.8 is more honest and better at coding
Anthropic has launched Claude Opus 4.8, a new version of its flagship AI model that the company says is less likely to hide mistakes or make unsupported claims while performing complex tasks. The upgrade builds on Claude Opus 4.7 and arrives as AI firms race to make autonomous systems more
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Claude Opus 4.8 is learning to say AI's three hardest words: "I don't know
Opus 4.8 represents a significant step forward in making AI systems more transparent about their knowledge limitations and uncertainties. Honesty is a key sticking point with even the most powerful LLMs. It's not so much that they're intentionally lying to you; instead, they'll confidently tell
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Claude Opus 4.8 launches today with agentic improvements, new features
Anthropic has today announced Claude Opus 4.8, the latest version of its AI model, with a focus on improving agentic capabilities. Available now, Claude Opus 4.8 delivers improvements across a number of different benchmarks, but primarily in agentic tasks. There are also several new features
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Anthropic upgrades Claude with new Opus 4.8 model, here's what's new
Anthropic has released its latest AI model with Claude Opus 4.8. The new version arrives less than two months after the previous model upgrade, ramping up Anthropic's upgrade cadence. Opus 4.8 is a 'more effective collaborator,' Anthropic says Anthropic describes Claude Opus 4.8 as having
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Anthropic Launches Claude Opus 4.8 With Gains in Coding and Honesty
Anthropic today announced the launch of its latest AI model, Claude Opus 4.8. Anthropic claims the model is a "more effective collaborator" with improvements in agentic coding, multidisciplinary reasoning, agentic computer use, knowledge work, and agentic financial analysis. Testers have found
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Claude Opus 4.8 just launched -- and Anthropic says it's far less likely to 'fake' answers
Anthropic has officially launched Claude Opus 4.8, the latest version of its flagship AI mode. With this rollout the company promises that it may have fixed one of AI's biggest flaws. According to Anthropic, Claude Opus 4.8 is designed to be more honest, more thoughtful and significantly less
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Anthropic's Claude Opus 4.8 is here with 3X cheaper fast mode and near-Mythos level alignment
Anthropic today released Claude Opus 4.8, an upgrade to its flagship model that ships at the same price as its predecessor, alongside a dramatically cheaper "fast mode" tier and a new feature that lets the model spawn hundreds of parallel subagents for codebase-scale work. The model is available
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Anthropic releases new model, Opus 4.8
Why it matters: The new model still lags the performance of Mythos, Anthropic's most advanced, but the company says Mythos-class models are expected "in the coming weeks." Driving the news: Anthropic said Opus 4.8 outperformed competitors on a number of key benchmarks, including agentic coding,
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Anthropic's Claude Opus 4.8 Is Here: Better AI Coding, Smarter Safety -- Same Huge Price
Opus 4.8's alignment scores are now comparable to Claude Mythos Preview, Anthropic's restricted frontier model, with rates of deceptive or misuse-friendly behavior substantially lower than its predecessor. Six weeks. That's how long it took Anthropic to go from Opus 4.7 to Opus 4.8. The new model
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Anthropic's Claude Mythos AI Model Nearing Release After Raising Cybersecurity Alarms
Anthropic has limited Claude Mythos access through its Project Glasswing program. Anthropic said Thursday that it expects to expand access to its Claude Mythos AI models "in the coming weeks," signaling the company may soon move beyond the tightly restricted rollout surrounding the
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Anthropic Says Its Latest Claude Model Is the 'Most Honest' Yet
The newest AI model model to hit the market is advertised as being remarkably honest. Anthropic has released Claude Opus 4.8, the next version of its large-sized series of Claude AI models, and allegedly its most honest model yet. Along with the new model, Anthropic is releasing new features for
[20]
The Hidden Strategy Behind Anthropic's New Claude Opus 4.8 Release
Anthropic has released Opus 4.8, introducing updates designed to enhance its AI's performance in areas like coding accuracy, reasoning and task management. A notable feature is the addition of dynamic workflows, which break down complex operations into smaller, verifiable subtasks to streamline
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Anthropic Debuts More Honest AI Model As Competition Intensifies
Anthropic has rolled out Claude Opus 4.8, replacing Opus 4.7 with improved performance and new controls for consumers and developers. The update delivers stronger results across a range of evaluations. For example, it aims to address a general problem with AI models: "They sometimes jump to
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How to Automate Multi-Step Tasks with Claude Opus 4.8 Workflows
Anthropic's latest release, Claude Opus 4.8, builds on the strengths of its predecessor while addressing key limitations that users highlighted in earlier versions. One of the standout improvements is its enhanced ability to handle ambiguous queries, a feature designed to provide more nuanced and
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Anthropic rolls out Claude Opus 4.8 with improved reasoning and coding performance
Anthropic has announced Claude Opus 4.8, the latest version of its flagship AI model. It builds on Opus 4.7 with improvements across coding, reasoning, and agentic tasks while maintaining the same pricing structure. The release also introduces new workflow controls, developer features, and
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Anthropic Releases Opus 4.8 as Battle for AI Supremacy Hots Up
This is the quickest upgrade from Anthropic and could be a result of the recent upgrades announced by OpenAI and Google to their AI models or the lukewarm response to the earlier model. Anthropic has released Opus 4.8, the newest version of their most advanced publicly available model, barely 40
[25]
Anthropic launches Claude Opus 4.8 with upgraded code and reasoning skills By Investing.com
Investing.com -- Artificial intelligence heavyweight Anthropic has officially rolled out its latest flagship model, Claude Opus 4.8, to users worldwide. The updated architecture builds directly upon the foundations of the previous Opus 4.7 iteration, delivering performance improvements across core
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Anthropic to roll out Claude Mythos in coming weeks, launches Opus 4.8
May 28 (Reuters) - Anthropic on Thursday said it is launching an upgraded Claude Opus 4.8 model even as it works to release its powerful, market-moving Mythos model to all customers in the coming weeks. Mythos is the AI lab's large language model with advanced cybersecurity capabilities that have
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Claude Opus 4.8 is uncertain: Here's why that's a good thing
Usually, when Anthropic announces a new model, I talk about how it is smarter, more token-friendly, or how much it outperforms the previous one on benchmarks. That is still the case with Claude Opus 4.8 but there is something else more interesting about it that I would rather get into. It has
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Claude Opus 4.8 is here but Anthropic is already teasing Mythos class AI models: What you should know
'One of the most prominent improvements in Opus 4.8 is its honesty,' the company said. Anthropic has announced that it is upgrading its Claude Opus with a new version dubbed, Opus 4.8. The company says the new model improves on Claude Opus 4.7 with better agentic coding capabilities, computer use,
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Anthropic released Claude Opus 4.8 with significant improvements in honesty and coding capabilities, just over a month after version 4.7. The AI model is 4x less likely to make unsupported claims and shows notable gains in agentic coding. Meanwhile, the company plans to release its powerful Mythos-class AI model to all customers within weeks after restricting access through Project Glasswing.
Anthropic Releases Claude Opus 4.8 With Enhanced Honesty
Anthropic launched Claude Opus 4.8 on Thursday, delivering what the company describes as a "modest but tangible improvement" over its predecessor just over a month after releasing version 4.7
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. The rapid iteration demonstrates how quickly the AI model landscape evolves, with the new large language model posting impressive benchmark gains particularly in agentic coding capabilities and what Anthropic calls "honesty in AI responses"4
.The most prominent improvement centers on reducing hallucination and unsupported claims. According to Anthropic, early testers found that Claude Opus 4.8 "is more likely to flag uncertainties about its work and less likely to make unsupported claims"
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. The company's evaluations show the model is around 4x less likely than its predecessor to allow flaws in code it has written to pass unremarked3
. This addresses a persistent problem where AI models sometimes jump to conclusions, confidently presenting their work as making progress despite thin evidence5
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Source: Decrypt
Benchmark Improvements Show Significant Gains in Agentic Coding Capabilities
Beyond honesty improvements, Claude Opus 4.8 demonstrates substantial performance gains across multiple benchmarks. The model shows almost a 5 percentage point increase in agentic coding and over an 8 percentage point increase in agentic terminal coding compared to version 4.7
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. Tom Pritchard, a staff engineer at Spotify who tested the model, noted that "Claude Opus 4.8 has noticeably better judgment. In Claude Code, it asks the right questions, catches its own mistakes, pushes back when a plan isn't sound, and builds up confidence around complex, multi-service explorations before making big changes"3
.The model also introduces new features that give users more control over computational resources. Users can now direct the amount of effort Claude puts into a task through Claude.ai and Claude Cowork. Higher-effort responses will use more tokens and potentially deliver better results, while lower settings respond faster and hit rate limits more slowly
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. In coding tasks, the default high effort setting spends a similar number of tokens as Claude Code Opus 4.7's default level but with better performance3
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Source: NYT
Dynamic Workflows Enable Hundreds of Parallel Subagents
Anthropic is launching a feature called dynamic workflows in research preview, designed for large-scale tasks such as codebase migrations across hundreds of thousands of lines of code. With dynamic workflows, "Claude can plan the work and then run hundreds of parallel subagents in a single session (and with Opus 4.8, the agents can run for even longer). It then verifies its outputs before reporting back to the user"
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. Rather than following a fixed plan, agents can adjust their priorities and tasks based on what they discover during their work3
. The debugging capabilities built into this feature connect directly to the model's improved honesty, as verifying results from hundreds of subagents requires reliable detection of uncertainty and failed outputs. Dynamic workflows will be available to Claude Code users on Enterprise, Team, and Max plans3
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Source: Gizmodo
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Mythos-Class AI Model Coming to All Customers Within Weeks
While releasing Claude Opus 4.8, Anthropic announced it is making "swift progress" on developing safeguards for its Claude Mythos Preview model and expects to bring Mythos-class AI model capabilities to all customers "in the coming weeks"
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. The company has restricted access to Mythos through Project Glasswing, limiting it to a consortium of partners including major tech firms such as Amazon, Microsoft, and Apple for cybersecurity purposes5
.The restricted release stems from the model's enhanced cybersecurity capabilities, which Anthropic deemed advanced enough to warrant giving cybersecurity experts and major tech companies lead time to patch flaws found by the model. Security researchers have confirmed the model can find exploits much more quickly than human hackers, with Mozilla's latest Firefox version including more than 200 fixes identified by Mythos Preview
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. However, the model's cost may limit its appeal to threat actors. Jake Williams, a cybersecurity researcher at IANS Research, found Mythos was 30 times as expensive in tests as the previous Opus model, placing it "outside the reach of many, including any commodity threat actors"1
.Darren Williams, founder and CEO of cybersecurity firm BlackFog, noted that "the window between a powerful model's release and broad adoption of defenses against it is always a vulnerable moment," highlighting the tension inherent in releasing such capable models even with safeguards
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. The upcoming public release will reveal whether Mythos lives up to expectations and how effective Anthropic's cybersecurity guardrails prove in practice.🟡 compliments to the story and in right order.References
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