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Claude Sonnet 4.5 Tops SWE-Bench Verified, Extends Coding Focus beyond 30 Hours
Anthropic's Claude Sonnet 4.5, its most advanced coding model, excels in task performance and safety, achieving a 98.7% safety score and improving real-world coding capabilities. Enhanced reasoning skills allow for sustained multi-step tasks, with notable user gains reported. This drop-in replacement demonstrates a powerful balance of capability and security for users.
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Anthropic’s Claude Opus 4.1 Improves Refactoring and Safety, Scores 74.5% SWE-bench Verified
Anthropic has launched Claude Opus 4.1, an update that strengthens coding reliability in multi-file projects and improves reasoning across long interactions. The model also raised its SWE-bench Verified score to 74.5%, up from 72.5%. Building on Opus 4, the new version strengthens Claude’s ability to act as a coding assistant, particularly in multi-file contexts.
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Claude Sonnet 4 Expands to 1 Million Token Context Window
Anthropic has upgraded Claude Sonnet 4 to support a context length of up to 1 million tokens, a fivefold increase over its previous limit. The feature, now in public beta, is accessible through the Anthropic API and Amazon Bedrock, with Google Cloud’s Vertex AI support expected soon.
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Claude Code Subagents Enable Modular AI Workflows with Isolated Context
Anthropic has recently made Claude Code Subagents generally available, enabling developers to create independent, task-specific AI agents with their own context, tools, and prompts.
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Anthropic Proposes Transparency Framework to Safeguard Frontier AI Development
Anthropic has proposed a new transparency framework designed to address the growing need for accountability in the development of frontier AI models. This proposal focuses on the largest AI companies that are developing powerful AI models, distinguished by factors such as computing power, cost, evaluation performance, and annual R&D expenditures.
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Claude Code Gains Support for Remote MCP Servers over Streamable HTTP
Anthropic has recently introduced support for connecting to remote MCP servers in Claude Code, allowing developers to integrate external tools and resources without manual local server setup.