Claude 3.7 Sonnet
claude-3-7-sonnet-2f55b91b·9 events·first seen 15d agoAliases: Claude 3.7 Sonnet
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Claude 3.7 Sonnet and Claude Code: Anthropic's First Hybrid Reasoning Model and Agentic Coding Tool
Anthropic has released Claude 3.7 Sonnet, described as their most capable model to date and the first hybrid reasoning model on the market, capable of operating in both standard and extended thinking modes within a single unified model. The model achieves state-of-the-art results on SWE-bench Verified and TAU-bench, with particular strength in coding and front-end web development. Alongside the model, Anthropic is launching Claude Code in limited research preview, a command-line agentic coding tool that can read/edit files, run tests, and push to GitHub. Pricing remains unchanged at $3/M input and $15/M output tokens, with availability across Claude.ai plans, Amazon Bedrock, and Google Cloud Vertex AI.
Anthropic Economic Index: Second Report on Claude 3.7 Sonnet Usage Patterns and Labor Market Effects
Anthropic has released its second Anthropic Economic Index report, analyzing 1 million anonymized Claude.ai conversations following the launch of Claude 3.7 Sonnet. Key findings include a rise in coding, education, science, and healthcare usage shares; extended thinking mode is predominantly used for technical tasks (computer science researchers ~10%, software developers ~8%); and augmentation still comprises 57% of usage versus automation. The report also introduces a novel bottom-up taxonomy of 630 granular usage categories and releases task-level datasets publicly on Hugging Face.
Anthropic Frontier Red Team reports early-warning signs of rapid AI progress in cybersecurity and biosecurity capabilities
Anthropic's Frontier Red Team published findings from a year of safety evaluations across four model releases, documenting rapid capability gains in dual-use domains. In cybersecurity, Claude 3.7 Sonnet now solves roughly a third of Cybench CTF challenges (up from ~5% a year ago), and with the Incalmo toolset was able to replicate a large-scale network attack in realistic cyber range environments. In biosecurity, Claude has moved from underperforming virology experts to exceeding them on the VCT benchmark within one year, and exceeds human expert baselines on cloning workflows. Anthropic assesses current models as showing 'early warning' signs but not yet crossing thresholds of substantially elevated national security risk.
Anthropic partners with U.S. National Labs for 1,000 Scientist AI Jam evaluating Claude on scientific tasks
Anthropic is participating in the U.S. Department of Energy's first 1,000 Scientist AI Jam, bringing together scientists across multiple National Laboratories to evaluate frontier AI models on scientific research and national security applications. Claude 3.7 Sonnet, recently launched as the first hybrid reasoning model, will be a primary subject of evaluation across tasks including hypothesis generation, experiment planning, code generation, and result analysis. This builds on Anthropic's April 2024 collaboration with the National Nuclear Security Administration, which was the first instance of a frontier lab evaluating a model in a Top Secret classified environment. The partnership signals deepening government-industry collaboration on AI for scientific discovery and national security.
Anthropic raises Series E at $61.5B post-money valuation
Anthropic has closed a $3.5 billion Series E round at a $61.5 billion post-money valuation, led by Lightspeed Venture Partners with participation from Bessemer, Cisco, Fidelity, General Catalyst, Salesforce Ventures, and others. Proceeds will fund next-generation AI system development, expanded compute capacity, mechanistic interpretability and alignment research, and international expansion. The raise follows the launch of Claude 3.7 Sonnet and Claude Code, with Anthropic citing strong enterprise adoption across customers including Cursor, Zoom, Snowflake, Pfizer, and Amazon's Alexa+.
Anthropic publishes structured harm assessment framework covering physical, psychological, economic, and societal impacts
Anthropic has released a policy document describing their evolving framework for assessing and mitigating AI harms across five dimensions: physical, psychological, economic, societal, and individual autonomy impacts. The framework complements their existing Responsible Scaling Policy and informs decisions on usage policies, red-teaming, detection, and enforcement. Concrete examples include safeguards for computer use capabilities (fraud, phishing) and a reported 45% reduction in unnecessary refusals in Claude 3.7 Sonnet through improved handling of ambiguous prompts. Anthropic frames this as a work-in-progress and invites collaboration from the broader AI ecosystem.
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.
Claude models approved for FedRAMP High and DoD IL4/5 workloads via Amazon Bedrock
Anthropic announced that Claude models are now approved for use in FedRAMP High and DoD Impact Level 4 and 5 workloads through Amazon Bedrock in AWS GovCloud (US) regions. Currently available models include Claude 3.5 Sonnet v1 and Claude 3 Haiku, with Bedrock capabilities such as Agents, Guardrails, and Knowledge Bases also accessible. This authorization opens Claude to federal agencies and defense organizations handling controlled unclassified information, representing a significant expansion into the U.S. government market. Additional models including Claude 3.7 Sonnet and Claude 4 may be added in the future.
Anthropic submits AI Action Plan recommendations to White House OSTP
Anthropic submitted formal recommendations to the White House Office of Science and Technology Policy in response to its Request for Information on a U.S. AI Action Plan. The submission covers six areas: national security testing of AI models, tightening semiconductor export controls (including H20 chips), enhancing lab security via classified government-industry channels, scaling energy infrastructure to 50 GW by 2027, accelerating government AI adoption, and preparing for economic disruption. Anthropic cites its expectation that powerful AI systems matching Nobel Prize-level intellect will emerge in late 2026 or early 2027, framing the recommendations as urgent national security and economic imperatives.