Anthropic releases its first Mythos-class model Claude Fable
…high-risk areas,” with the system falling back to Claude Opus 4.8 — a model it praised for “honesty” when it launched last month. Anthropic singled out cybersecurity and biology as two…
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Claude Fable 5 caught bugs GPT-5.5 and Opus 4.8 missed, then the US government forced it offline
4d agoAnthropic launches Claude Fable 5, a state-of-the-art AI model that beats OpenAI's GPT-5.5
1w agoAnthropic Launches Claude Fable 5, Its First Public Mythos-Class Model
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1w agoOpenAI GPT 5.5 and 5.5 Pro launch with $25,000 bounty
OpenAI GPT 5.5 and 5.5 Pro have launched with enhanced intelligence and greater cybersecurity threats, requiring enhanced safeguards. Versus Claude Opus 4.7, GPT 5.5 / 5.5 Pro demonstrates…
An Adventure Photography Game Has Quietly Become The Highest-Rated Game Of The Year
…Prism Peak Is The Best-Reviewed Game Of The Year No, it's a game that launched today called Opus: Prism Peak . The little-known game has a 91 on OpenCritic . That…
Claude Fable is too scared to teach you about the powerhouse of the cell
…refused, Opus 4.8 generally answered perfectly well. Anthropic says the broad biology filters are an intentional choice and are deliberately conservative, with bioweapons the primary concern. “With the launch of…
Discussions and forums
Anthropic to roll out Claude Mythos in coming weeks, launches Opus 4.8
Anthropic to roll out Claude Mythos in coming weeks, launches Opus 4.8
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Claude Fable is a myth, just like new iPhone releases
28 minutes of launch has already passed and for me, it is crystal clear, just branding. 10-15% better than Opus.We are slowing down in adoption and new features, Anthorpic is becoming Apple of Tim Cook and not from Steve…
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Introducing Claude Fable 5
Introducing Claude Fable 5: a Mythos-class model that we've made safe for general use. Its capabilities exceed those of any model we've ever made generally available. Fable 5 is state of the art on nearly all tested benc…
Launch HN: Expanse (YC P26) – Unlock Wasted GPU Capacity
Hey HN, we’re Ismaeel, Eren, Yafet and Nikodem. We built Expanse (https://expanse.sh/) to increase the effective capacity of your HPC/GPU clusters running schedulers/orchestrators like Kubernetes and SLURM. We read the s…
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Show HN: Haystack – Review the PRs that need human attention
Hey HN! We're building Haystack (https://haystackeditor.com/) to help teams deal with the explosion in the number of pull requests that need to be reviewed due to the rise of coding agents.Haystack replaces the GitHub PR…
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Anthropic releases Claude Fable, a version of Mythos, days after warning AI is becoming too dangerous
…In high-risk areas like cybersecurity, biology, chemistry, and distillation , the model blocks responses and falls back to Claude Opus 4.8. Launched as a preview in April, Mythos was initially limited…
An update on recent Claude Code quality reports
…A system prompt change to reduce verbosity Our latest model, Claude Opus 4.7, has a notable behavioral quirk relative to its predecessor: as we wrote about at launch, it tends to…
Claude Opus 4.8 vs Gemini 3.1 Pro: I ran 7 brutal tests to find the smarter AI
When Anthropic launched Claude Opus 4.8, it immediately reignited the AI chatbot race. After seeing how it performed against ChatGPT , I was curious how it would stack up against Gemini 3…
Anthropic rolls out Claude Fable 5, but it's available for a limited time
…As a result, it's launching a safer version called "Fable 5." According to Anthropic, this model has strict safeguards in place that will block or divert sensitive queries, like those involving…
Opus: Prism Peak Is A Makoto Shinkai Blockbuster In Video Game Form
…So what does any of this have to do with Opus: Prism Peak , the new narrative adventure from developer Sigono Inc? Well, when I spoke to publisher Shuiesha Games at Gamescom last…
I use ChatGPT every day — but Gemini and Claude keep beating it in these key areas
…autonomy Anthropic’s newly dropped Claude Opus 4.8 is not only smarter, it wants to do your job for you. Alongside the model, Anthropic launched Dynamic Workflows (currently in research preview…