Anthropic Releases Claude Mythos Preview with Extraordinary Cybersecurity Capabilities, Forms Project Glasswing Consortium
Anthropic has published a 244-page model card for Claude Mythos Preview, a large language model not yet commercially available, which broadly outperforms Claude Opus 4.6 and is described as 'strikingly capable' at identifying and exploiting code vulnerabilities. To mitigate risks before potential release, Anthropic assembled Project Glasswing, a consortium including AWS, Apple, Google, Microsoft, CrowdStrike, Nvidia, and 40+ other organizations, funded with $100 million in API credits and $4 million in open-source security donations. This marks the first time Anthropic has published a model card without making the model commercially available, signaling an unusual safety-first deployment posture. The issue also includes commentary from Andrew Ng on AI's impact on software engineering jobs, arguing against an 'AI jobpocalypse' narrative.
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Claude Mythos Preview: Limited-Release Frontier Model with Exceptional Cybersecurity Capabilities
Anthropic has published a 244-page model card for Claude Mythos Preview, a frontier model not yet commercially available, which autonomously discovered thousands of high-severity vulnerabilities in popular operating systems and browsers during testing. To mitigate risks before potential deployment, Anthropic assembled Project Glasswing, a consortium of over 40 organizations including AWS, Apple, Google, Microsoft, and CrowdStrike, funded with $100M in model credits to patch vulnerabilities proactively. The model substantially outperforms Claude Opus 4.6, GPT-5.4, and Gemini 3.1 Pro across multiple benchmarks including CyberGym (83.1%), Terminal-Bench 2.0 (82%), GPQA Diamond (94.5%), HLE (64.7%), and GraphWalks long-context (80%). The Batch notes parallels to OpenAI's GPT-2 limited-release strategy and characterizes the announcement as having elements of a publicity stunt alongside genuine safety concerns.
Anthropic expands Project Glasswing to 150 new organizations across critical infrastructure sectors
Anthropic is expanding Project Glasswing, its AI-assisted cybersecurity initiative, from ~50 initial partners to approximately 150 additional organizations spanning power, water, healthcare, communications, and hardware sectors across 15+ countries. Partners use Claude Mythos Preview to scan codebases for vulnerabilities, with the initial cohort already identifying more than 10,000 high- or critical-severity security flaws. Anthropic also announced Claude Security, a product using Claude Opus 4.8 for codebase scanning and patch suggestions, and is releasing internal vulnerability-finding tools to trusted security teams. The company warns that Mythos-class cyber capabilities will be widely available within 6–12 months and frames Project Glasswing as a proactive effort to help defenders adapt before that threshold is reached.
Anthropic Releases Claude Opus 4.7 with Enhanced Coding, Vision, and Cyber Safeguards
Anthropic has released Claude Opus 4.7, a general-availability model positioned as a meaningful improvement over Opus 4.6 in advanced software engineering, long-horizon agentic tasks, and vision capabilities including higher image resolution. The model is notably the first to receive new cybersecurity safeguards developed in response to Project Glasswing, with automatic detection and blocking of prohibited cyber uses and a new Cyber Verification Program for legitimate security professionals. Opus 4.7 is available across Claude products, API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry at the same pricing as Opus 4.6 ($5/$25 per million input/output tokens). The release is explicitly positioned below Claude Mythos Preview in overall capability, serving as a testbed for safety mechanisms before broader deployment of Mythos-class models.
Anthropic releases Claude Mythos 5 and Claude Fable 5 with unprecedented capability restrictions and safety tiers
Anthropic launched Claude Mythos 5, a restricted-access model capable of cracking previously secure software, and Claude Fable 5, a general-use version with novel safety classifiers that block or degrade responses on cybersecurity, biology, chemistry, and AI-development topics. Both models set new state-of-the-art results across software engineering, agentic coding, knowledge work, and scientific reasoning benchmarks, and are priced at roughly half the cost of the prior Claude Mythos Preview. Claude Fable 5 initially included undisclosed capability degradation for AI-development prompts — applied silently via prompt modification or steering vectors — which sparked controversy before Anthropic modified the policy. The release represents a significant escalation in both frontier capability and the operational complexity of safety-tiered model deployment.
Claude Opus 4.8 Launches with Improved Honesty; Anthropic Previews Mythos-Class Models and Dynamic Workflows
Anthropic released Claude Opus 4.8 with improvements in coding, reasoning, agentic tasks, and notably better uncertainty flagging—approximately four times less likely than Opus 4.7 to let code flaws pass uncommented. Alongside the model, Anthropic introduced dynamic workflows in Claude Code enabling tens to hundreds of parallel subagents for large-scale engineering tasks, an effort-control slider, and a 3x price cut on fast mode. Anthropic also previewed Mythos-class models, positioned above Opus in capability, currently available to a limited set of organizations for cybersecurity work pending broader safety clearance. The same digest covers MiniMax M3 (open-weights, ~60% SWE-Bench Pro), Nvidia's RTX Spark superchip, Cosmos 3 world model, and a GR00T/Unitree robotics partnership.
The Batch: Claude Mythos 5 / Fable 5 debut, Apple AFM 3, Google Live Translate, OpenAI IPO filing, FrontierCode benchmark
Anthropic launched Claude Fable 5 (a safety-guardrailed model) and Claude Mythos 5 (same underlying model with safeguards removed, for vetted cyberdefense/infrastructure users via Project Glasswing with US government collaboration), both priced at $10/$50 per million tokens. Apple released five new Apple Foundation Models (AFM 3) spanning on-device and cloud tiers, built with Google and Nvidia infrastructure. Additional headlines cover Google's Gemini 3.5 Live Translate (70+ languages, real-time), OpenAI's confidential SEC IPO filing, a NotebookLM upgrade to Gemini 3.5, and Cognition's FrontierCode benchmark for code-quality evaluation where Claude Opus 4.8 leads at 34.3%.
Anthropic launches Claude Mythos 5 and Claude Fable 5; Andrew Ng introduces OpenCoworker desktop agent
Anthropic released Claude Mythos 5 and Claude Fable 5, two variants of the same frontier model that set new state-of-the-art results across software engineering, knowledge work, cybersecurity, and agentic coding benchmarks. Claude Fable 5 is the general-availability version with safety classifiers that restrict responses on security, biology, chemistry, and cutting-edge AI topics, priced at $10/$50 per million input/output tokens; Mythos 5 is restricted to selected partners via Project Glasswing. Separately, Andrew Ng and collaborators released OpenCoworker, a free open-source desktop agent harness built on top of aisuite, designed to give users privacy-preserving agentic workflows with their own API keys or local models. The newsletter also contextualizes the broader shift toward LLM-driven agent harnesses as frontier models have become capable enough to reliably drive next-action decisions.
Data Points: Anthropic's Claude Mythos Cybersecurity Claims Face Scrutiny; OpenAI-Cerebras Deal; Meta AI CEO Avatar; Infrastructure Delays
A multi-item digest covers skepticism around Anthropic's Claude Mythos zero-day vulnerability claims (flagged as overstated by Tom's Hardware based on limited 198-case evidence), OpenAI's $20B+ deal with Cerebras for AI processors including a potential ~10% equity stake, and satellite data showing ~40% of U.S. AI data center projects are behind schedule. Additional items cover Meta developing an AI avatar of CEO Zuckerberg for internal use, Moody's flagging credit stress in AI-disrupted sectors, and Luma AI launching an AI-driven film production studio using its Uni-1 model.