Anthropic’s Claude 3.7 Sonnet Introduces Hybrid Reasoning

After an exciting start to 2025 with the release of DeepSeek’s Chatbot, it’s now Anthropic’s turn to unveil its latest AI model — Claude 3.7 Sonnet. The new tool is designed to strike a balance between speed and deeper responses, and is being marketed as the first hybrid reasoning model. Claude now gives users the option to choose between rapid responses or a more methodical, step-by-step approach, using a simple dropdown menu to let you decide how queries should be processed.

“We’ve developed Claude 3.7 Sonnet with a different philosophy from other reasoning models on the market. Just as humans use a single brain for both quick responses and deep reflection, we believe reasoning should be an integrated capability of frontier models rather than a separate model entirely,” Anthropic explains. “This unified approach also creates a more seamless experience for users”.

While Anthropic doesn’t call out OpenAI directly, the comparison is hard to ignore. OpenAI currently offers multiple models — GPT-4, o1, o1-mini, and o3-mini — creating a somewhat fragmented experience. Even OpenAI CEO Sam Altman recently acknowledged this issue, posting on X, “We hate the model picker as much as you do and want to return to magic unified intelligence”.

Claude 3.7 Sonnet was also developed with a different focus in mind: Rather than prioritizing high-stakes math and coding challenges, Anthropic aimed to optimize real-world applications. According to the company, users will see notable improvements in areas like coding and front-end web development, reflecting how businesses and developers actually engage with AI.

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The new model is available starting today across all Claude plans, including Anthropic’s free tier. Developers can also access it through Anthropic’s API, Amazon Bedrock, and Google Cloud’s Vertex AI.

Additionally, Anthropic is also rolling out a new tool called Claude Code, designed to streamline software development. This “agentic” system, currently in limited research preview, allows developers to assign coding tasks directly to Claude via a terminal interface. It can read and edit code, run tests, and even push commits to GitHub — offering a glimpse into a more automated, AI-assisted workflow.