Anthropic has just announced Claude Sonnet 4.5 and is calling it the “best in the world” for coding, real-world agent and complex computer use. In internal testing, Sonnet 4.5 ran autonomously for more than 30 hours straight while maintaining performance and focus. This is a giant leap from the seven hours possible with Claude Opus 4 just months ago.
With nearly a full work week of nonstop AI effort, this new model underscores the possibilities of where the future of work and personal productivity might be headed.
Is vibe coding the future?
With vibe coding so easy that anyone can do it, Claude Sonnet 4.5 hints at how AI could soon handle everyday tasks more reliably. Instead of just spitting out snippets of code or short answers, this model can stay focused for hours, which means it’s finally practical for real projects or just about anything else they are prompted to do.
From apps and websites to so much more, here’s what is now possible:
- Longer attention span: Where most AI assistants lose track of context after a few minutes or pages, Sonnet 4.5’s ability to stay focused for hours could make it a game-changer for things like drafting long reports, managing research projects, or debugging persistent problems.
- Closer to a “real” AI assistant: Anthropic’s improvements in memory and computer use bring us closer to an AI that can act like a reliable coworker — remembering your goals, managing files, and sticking with complex projects until they’re done.
- Practical tools for creators: Anthropic is also rolling out file creation for all paid Claude plans and expanding Claude for Chrome, making advanced features more accessible beyond enterprise clients.
Here's what sets Claude Sonnet 4.5 apart
- Best-in-class for coding: The model leads benchmarks like SWE-Bench Verified, generates production-ready code, and can refactor large codebases with better judgment than previous versions.
- Real-world computer use: Anthropic says Sonnet 4.5 is now the market leader in “computer use,” the ability for AI to interact directly with software and tools on your behalf.
- Stronger across industries: Early results show that Sonnet 4.5 outperforms earlier models in finance (research and forecasting), cybersecurity (detecting and fixing vulnerabilities), and research-intensive fields.
- Developer-ready features: With access to virtual machines, memory, context management, and multi-agent support, it’s built for anyone experimenting with custom AI agents.
Claude Sonnet 4.5 is here just four months after Sonnet 4, highlighting just how quickly AI is evolving. Instead of being limited to short bursts, it now sustains output across multi-day projects. Anthropic positions it as both more powerful and safer, with a balance of speed and cost that could attract not just businesses, but everyday users who want a reliable assistant for demanding projects.
The takeaway
Anthropic could potentially win over Gemini and ChatGPT users, especially those who want AI to tackle their biggest and most complex workloads with speed and efficiency.
Because Claude Sonnet 4.5 can sustain effort, remember context, and interact with the tools you already use – all with human-like conversations - the dream of a true digital sidekick is quickly becoming a reality.
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