September 29, 2025 - Sonnet 4 improves on Sonnet 3.7 across a variety of areas, especially coding. It offers frontier performance that’s practical for most AI use cases, including user-facing AI assistants and high-volume tasks. ... Sonnet 3.7 is the first hybrid reasoning model and our most intelligent model to date. It’s state-of-the art for coding and delivers significant improvements in content generation, data analysis, and planning. ... Anyone can chat with Claude using Sonnet 4.5 on Claude.ai, available on web, iOS, and Android.

Talk with Claude, an AI assistant from Anthropic

Claude Opus 4 and Sonnet 4 are hybrid models offering two modes: near-instant responses and extended thinking for deeper reasoning. The Pro, Max, Team, and Enterprise Claude plans include both models and extended thinking, with Sonnet 4 also available to free users.

1 day ago - Sonnet 4.5 and Haiku 4.5 provide 200 000-token windows, sufficient for most research, compliance, or analytical workloads. All Claude 4.5 models output up to 64 000 tokens per response, supporting ultra-long reports, detailed summaries, and rich code reviews.

Anthropic's mid-size model with superior intelligence for high-volume uses, such as coding, in-depth research, and agents · Try in Vertex AI View model card in Model Garden

2 days ago - No, there is no dedicated Claude Sonnet 4.5 subscription plan.

May 23, 2025 - Claude Opus 4 answered correctly on the first attempt. Next, I wanted to see how well Claude Sonnet 4 handles a more complex problem: use all digits from 0 to 9 exactly once to make three numbers x, y, z such that x + y = z.

3 days ago - On May 22, 2025, Anthropic released two more models: Claude Sonnet 4 and Claude Opus 4. Anthropic added API features for developers: a code execution tool, a connector to its Model Context Protocol, and Files API. It classified Opus 4 as a "Level 3" model on the company's four-point safety scale, meaning they consider it so powerful that it poses "significantly higher risk".

May 23, 2025 - Claude Opus 4 is now available ... AI agents that can handle complex, multistep workflows across software development and enterprise operations. Claude Sonnet 4, which is optimized for high-volume production workloads is coming soon....

September 29, 2025 - Claude Sonnet 4.5 is the best coding model in the world. It's the strongest model for building complex agents. It’s the best model at using computers.

September 29, 2025 - Amazon Web Services announces Claude Sonnet 4.5 in Amazon Bedrock, featuring advanced capabilities in coding, tool handling, and long-horizon tasks, with improvements in memory management, context processing, and industry-specific applications across finance, research, and cybersecurity sectors.

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September 29, 2025 - Sonnet · SonnetSonnet · Haiku · HaikuHaiku · Solutions · AI agents · AI agentsAI agents · Code modernization · Code modernizationCode modernization · Coding · CodingCoding · Customer support · Customer supportCustomer support · Education · EducationEducation ·

Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Run Claude Sonnet 4 with API

August 21, 2025 - However. Price is king. Allowing me to flood the context window with my code base is great, but given that the price has substantially increased, it makes sense to better manage the context window into the current situation. The value I'm getting here flooding their context window is great ...

May 23, 2025 - It surpasses its predecessor, Claude Sonnet 3.7, across coding and reasoning while responding more precisely to steering. Use cases include coding tasks such as code reviews and bug fixes, AI assistants, efficient research, and large-scale content generation and analysis. Claude Opus 4 and Claude Sonnet 4 are generally available as a Model-as-a-Service (MaaS) offering on Vertex AI.

Explore Claude Sonnet 4 on GlobalGPT: Fast, efficient AI for coding, tool integration, and agent workflows. 200K context, hybrid reasoning, enterprise-ready.