Anthropic Announces Claude 3.7 Sonnet: The World’s First Hybrid Reasoning AI
February 24, 2025 – Big news from Anthropic today: the launch of Claude 3.7 Sonnet, their smartest model yet, and Claude Code, a game-changing coding tool. This release introduces the world’s first hybrid reasoning AI, blending instant answers with deep, visible problem-solving—all wrapped in a practical, user-friendly package. Here’s everything you need to know.
- New command-line tool for developers in limited research preview
- Searches code, edits files, runs tests, and commits to GitHub
- Reduces 45-minute tasks to a single pass
- Planned improvements include reliability upgrades and long-running command support
- GitHub integration now available on all Claude.ai plans
- Improved code understanding for bug fixing and feature building
- Better documentation capabilities with deeper codebase comprehension
- Robust safety testing with improved filters and detailed system card
Meet Claude 3.7 Sonnet: Smarter and More Versatile
Claude 3.7 Sonnet isn’t your average AI. It’s designed to think like a human—handling quick replies and complex challenges with a single, seamless system. Anthropic calls it a "unified approach” to reasoning, and it’s already turning heads.
- Two Modes, One Model: Use standard mode for fast answers or extended thinking mode for step-by-step reasoning—perfect for math, physics, coding, and more.
- Fine-Tuned Control: API users can set a "thinking budget” (up to 128,000 tokens) to balance speed and depth.
- Real-World Focus: Optimized for practical tasks over academic puzzles, making it a business-ready powerhouse.
Early testers—like Cursor, Cognition, Vercel, Replit, and Canva—praise its coding chops, from mastering complex codebases to building production-ready web apps with style.
Claude 3.7 Sonnet
World's First Hybrid Reasoning AI
Standard Mode
Extended Thinking Mode
Step 2: Use browser DevTools to take heap snapshots at different intervals to compare memory allocation patterns.
Step 3: Look for detached DOM elements, which often indicate event listeners preventing garbage collection.
Step 4: Check for closure-related leaks where references to large objects are maintained in callbacks.
Step 5: Examine timers and event handlers that might retain references to objects that should be garbage collected.
Step 6: Create a minimal reproduction case to isolate the issue from the full application complexity.
Step 7: Implement and verify the fix with before/after memory profiles to ensure resolution.
Benchmark Performance
Availability and Pricing
Claude 3.7 Sonnet is live now and accessible to everyone.
- Where to Find It: Available on all Claude plans (Free, Pro, Team, Enterprise), the Anthropic API, Amazon Bedrock, and Google Cloud’s Vertex AI.
- Extended Thinking: Included on all paid tiers, but not the free plan.
- Cost: Stays affordable at $3 per million input tokens and $15 per million output tokens (including thinking tokens).
Claude Code: Your Coding Sidekick
For developers, Claude Code is the star of the show. Launched as a limited research preview, this command-line tool lets Claude tackle big coding jobs while keeping you in the driver’s seat.
- What It Does: Searches code, edits files, runs tests, commits to GitHub, and more.
- Time-Saver: Cuts 45-minute tasks into a single pass—ideal for debugging, refactoring, and test-driven development.
- Work in Progress: Anthropic plans to boost reliability, add long-running command support, and refine it with user feedback.
Want in? Sign up for the preview and help shape its future.
A Better Coding Experience on Claude.ai
Claude 3.7 Sonnet also upgrades the Claude.ai platform, especially for coders.
- GitHub Integration: Now on all plans—connect your repos and let Claude dig into your projects.
- Smarter Assistance: Fixes bugs, builds features, and writes docs with a deeper grasp of your codebase.
Top Performance, Proven Results
Claude 3.7 Sonnet shines on key benchmarks, cementing its place as a leader.
- SWE-bench Verified: Tops the charts for solving real-world software issues.
- TAU-bench: Excels at complex, multi-step tasks with tools and user interaction.
- Beyond Benchmarks: Even outplays rivals in Anthropic’s Pokémon gameplay tests!
Built with Responsibility in Mind
Anthropic isn’t cutting corners on safety.
- Robust Testing: Worked with experts to ensure security and reliability.
- Smarter Filters: Reduces unnecessary refusals by 45% while catching harmful requests.
- Transparency: A detailed system card covers safety measures, prompt injection defenses, and reasoning reliability.
Looking Ahead
Claude 3.7 Sonnet and Claude Code mark a leap toward AI that doesn’t just assist—it collaborates. Whether you’re coding faster or solving real-world problems, Anthropic’s latest tools are here to amplify what you can achieve. Ready to try them? They’re live now—jump in and see the difference!
