Anthropic Introduces Claude 4: Opus 4 and Sonnet 4 Models

Hey AI enthusiasts! Get ready, because Anthropic just dropped some exciting news on May 22, 2025: the next generation of Claude models is here! Say hello to Claude Opus 4 and Claude Sonnet 4. These aren't just minor updates; they're setting brand-new industry standards for advanced reasoning, coding capabilities, and AI agent workflows.

What it's for

So, what makes these new models special? Let's dive in. Claude Opus 4 is being hailed as the world's best coding model, absolutely crushing it with 72.5% on SWE-bench and 43.2% on Terminal-bench. If you're tackling long-running, complex tasks that need sustained performance over several hours, Opus 4 is your new best friend.

Not to be outdone, Claude Sonnet 4 is a significant upgrade from Sonnet 3.7. It's a powerhouse in coding too, achieving a state-of-the-art 72.7% on SWE-bench. It strikes that perfect balance between top-tier performance and efficiency.

Both models come packed with new capabilities, including extended thinking with tool use (currently in beta), parallel tool execution for juggling multiple tasks, and significantly improved memory capabilities when developers grant local file access. They can even provide thinking summaries to condense lengthy thought processes!

And for all you developers, Claude Code is now generally available! This means smoother workflows with background tasks via GitHub Actions and native integrations with VS Code and JetBrains. Imagine Claude displaying its edits directly in your files for seamless pair programming! Plus, new API features like the code execution tool, MCP connector, Files API, and prompt caching (for up to an hour) empower developers to build even more sophisticated AI agents.

Why it matters

These new models truly push the boundaries of what AI can do. They're hybrid models, offering both near-instant responses for quick tasks and extended thinking for deeper, more complex reasoning. This flexibility means you get the best of both worlds, whether you need a quick answer or a comprehensive solution.

One super cool detail: both Opus 4 and Sonnet 4 are 65% less likely to engage in shortcuts or loopholes on agentic tasks compared to Sonnet 3.7. This means more reliable and trustworthy outputs for your critical projects. Opus 4 and Sonnet 4 are included in Pro, Max, Team, and Enterprise Claude plans, with Sonnet 4 also available to free users – so more people can access cutting-edge AI! And don't worry about pricing, it remains consistent with previous models, making these powerful new tools accessible.

Where you get it

Ready to try them out? Both Claude Opus 4 and Sonnet 4 are widely available. You can access them via Anthropic's API, on Amazon Bedrock, and through Google Cloud's Vertex AI. Developers looking to integrate Claude into their coding workflows should definitely check out About Claude Code. For a deeper dive into all things Claude, you can always Learn about Claude on their official site.

Try it: Introducing Claude 4 for details and links to get started!