Anthropic Introduces Next-Gen AI Coding Model Claude Sonnet 4.5 for Building Complex Agents, Rolling Out Updates for Claude Code; Check Details

Anthropic has introduced the Claude Sonnet 4.5 model, which is teased as "the best coding model in the world." The new version can run on every application, spreadsheet, and software tool. In a post on X (formerly Twitter) on 29 September 2025, Claude said, “It's the strongest model for building complex agents. And it shows substantial gains on tests of reasoning and math.” The company added that Claude Sonnet 4.5 has shown big progress in its ability to use computers. In a blog post, Anthropic said, “On OSWorld, a benchmark that tests AI models on real-world computer tasks, Sonnet 4.5 now leads at 61.4%." As per Anthropic, Claude Sonnet 4.5 performed well in the SWE-bench Verified evaluation, which assesses practical coding skills. The model managed to stay for over 30 hours on complex and multi-step tasks. Anthropic has rolled out updates for Claude Code with a new terminal interface. Additionally, a new VS Code extension now allows developers to access Claude within their IDE. Microsoft Introduces xAI’s Grok 4 in Azure AI Foundry To Offer Frontier Intelligence and Business-Ready Capabilities.

Claude Sonnet 4.5

Claude Code Update

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