Anthropic Clears Its Export-Control Standoff and Ships Sonnet 5 and Claude Science
One company dominated the AI news cycle over the past day: Anthropic closed out an 18-day dispute with Washington over its most powerful models, while simultaneously launching a new flagship coding model and a dedicated workbench for scientists.
US lifts export controls on Claude Fable 5 and Mythos 5
The US Department of Commerce has withdrawn the export control directive it issued on June 12 after Amazon researchers reported a method for bypassing Fable 5’s cybersecurity safeguards. Anthropic says it trained an improved safety classifier that blocks the reported technique in over 99% of cases, and Fable 5 will return globally starting July 1, with Mythos 5 access restored for approved US organizations following government sign-off on June 26.
Anthropic proposes an industry standard for scoring AI jailbreaks
Alongside the redeployment, Anthropic is partnering with Amazon, Microsoft, Google, and other Project Glasswing members on a shared framework for rating the severity of AI jailbreaks, based on capability gain, breadth, ease of weaponization, and discoverability. The company says it hopes the framework becomes a template for coordinated government and industry response to future safeguard bypasses.
Claude Sonnet 5 launches with frontier agentic performance
Anthropic also introduced Claude Sonnet 5, described as its most agentic Sonnet-class model yet, with performance approaching Opus 4.8 on coding and tool-use benchmarks at a lower price. The model is now the default for Free and Pro plans and is available across Claude Code and the Claude Platform, with introductory pricing of $2/$10 per million input/output tokens through August 31.
Claude Science opens a workbench for researchers
Rounding out the day, Anthropic released Claude Science in beta, an app that bundles more than 60 research-focused skills and connectors for genomics, proteomics, and cheminformatics into a single environment that runs on a scientist’s own laptop, cluster, or HPC login node. Early users, including Manifold Bio and researchers at the Allen Institute and UCSF, report the tool has cut analysis and literature-review timelines from years to weeks.
What to watch: Fable 5’s global return on July 1 and Google’s still-pending Gemini 3.5 Pro release will be the next tests of whether Anthropic’s momentum holds through the summer.