Anthropic activates ASL-3 safety protections for Claude Opus 4 launch
Anthropic has activated its AI Safety Level 3 (ASL-3) Deployment and Security Standards in conjunction with launching Claude Opus 4, marking the first time any Anthropic model has been deployed under ASL-3 rather than the baseline ASL-2. The activation is described as precautionary: Anthropic has not conclusively determined that Opus 4 crosses the ASL-3 capability threshold, but cannot rule it out due to continued improvements in CBRN-related knowledge. ASL-3 measures include Constitutional Classifiers to block end-to-end CBRN weapon development workflows and enhanced model-weight security against sophisticated non-state attackers. Claude Sonnet 4 was evaluated and cleared for ASL-2, and ASL-4 was ruled out for Opus 4.
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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 makes Claude 3 Haiku and Sonnet available to US Intelligence Community and AWS GovCloud
Anthropic has made Claude 3 Haiku and Claude 3 Sonnet available via AWS Marketplace for the US Intelligence Community and AWS GovCloud, marking a significant expansion into government deployment. The company has crafted contractual exceptions to its general Usage Policy to permit legally authorized foreign intelligence analysis, including combating human trafficking and identifying covert influence campaigns, while maintaining restrictions on disinformation, weapons design, and malicious cyber operations. The deployment is currently limited to ASL-2 models under Anthropic's Responsible Scaling Policy. Anthropic also notes prior pre-release access to Claude 3.5 Sonnet was provided to the UK AI Safety Institute for pre-deployment testing.
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.
Anthropic introduces computer use capability, upgraded Claude 3.5 Sonnet, and Claude 3.5 Haiku
Anthropic announced three major developments: an upgraded Claude 3.5 Sonnet with significant coding improvements (SWE-bench Verified rising from 33.4% to 49.0%, surpassing all publicly available models including reasoning models), a new Claude 3.5 Haiku that matches Claude 3 Opus performance at Haiku-tier speed, and a public beta of 'computer use' — a capability allowing Claude to control computers by viewing screens, moving cursors, clicking, and typing. Computer use is available via the Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI, with early adopters including Replit, The Browser Company, and Cognition. Both safety institutes (US AISI and UK AISI) conducted pre-deployment testing, and the model was assessed as remaining within ASL-2 under Anthropic's Responsible Scaling Policy.
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.
Anthropic Releases Computer Use Capability for Claude 3.5 Sonnet
Anthropic has launched a public beta of computer use for Claude 3.5 Sonnet, enabling the model to control a computer by interpreting screenshots and issuing pixel-level cursor and keyboard commands. The model achieves 14.9% on the OSWorld benchmark, roughly double the next-best AI model's 7.7%, though well below human-level performance of 70-75%. Anthropic trained the model on a small set of simple software tools and found it generalized rapidly to broader computer interaction. Safety analysis confirmed the capability remains at AI Safety Level 2, with prompt injection identified as a primary near-term risk.
Anthropic launches bug bounty program to stress-test ASL-3 Constitutional Classifiers
Anthropic launched an invite-only bug bounty program in partnership with HackerOne to find universal jailbreaks in its Constitutional Classifiers system before public deployment, offering up to $25,000 per verified vulnerability. The program targets CBRN-related safety bypasses on Claude 3.7 Sonnet and is part of Anthropic's work to meet its AI Safety Level-3 (ASL-3) Deployment Standard under its Responsible Scaling Policy. A follow-up update extended the program to test Constitutional Classifiers on the new Claude Opus 4 model and began accepting reports of universal jailbreaks found on public platforms. The initiative reflects Anthropic's structured approach to pre-deployment safety validation for increasingly capable models.
Introducing Claude 3.5 Sonnet
Anthropic launches Claude 3.5 Sonnet, the first model in its Claude 3.5 family, claiming it outperforms Claude 3 Opus and competitor models on GPQA, MMLU, and HumanEval benchmarks while operating at twice the speed and mid-tier pricing ($3/$15 per million tokens). The model features a 200K context window, improved vision capabilities, and an internal agentic coding evaluation score of 64% versus 38% for Opus. Alongside the model, Anthropic introduces Artifacts on Claude.ai, a dedicated workspace for real-time editing of AI-generated content. The model was pre-deployment evaluated by the UK AI Safety Institute and assessed at ASL-2.