Anthropic has launched its next-generation AI models, Claude Opus 4 and Claude Sonnet 4 , positioning them as major advancements in AI coding, reasoning, and agentic capabilities. The release is part of the broader Claude 4 update , which also includes new developer tools, improved memory functions, and enhanced agent workflows. Both models introduce “extended thinking with tool use” in beta, allowing Claude to alternate between internal reasoning and external tools like web search. They also support parallel tool execution, improved memory handling, and enhanced instruction-following. When granted file access, Opus 4 can create and reference memory files, increasing contextual understanding and long-term coherence.
Claude Opus 4
Claude Opus 4 is being touted by the company as the most powerful coding model to date with benchmarks like SWE-bench (72.5%) and Terminal-bench (43.2%). The AI model is said to be capable of sustained performance across complex, multi-step tasks. The model powers long-running workflows and supports agent applications that require persistent focus and reasoning.
Claude Sonnet 4
Claude Sonnet 4, on the other hand, is said to be a substantial upgrade from Sonnet 3.7, balancing high performance with efficiency. It is claimed to achieve a 72.7% score on SWE-bench and is designed for both internal use and third-party deployment. The model has already been adopted by GitHub as the core of its new Copilot coding agent.
Both models are accessible via the Claude Pro, Max, Team, and Enterprise plans, with Sonnet 4 also available to free-tier users. Pricing remains unchanged from the previous generation. The Claude 4 launch is available now across the Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI.
Anthropic notes that both models are 65% less likely to take shortcuts in agentic tasks, compared to Sonnet 3.7. They've also introduced “thinking summaries” to condense longer reasoning chains for easier interpretation, while offering a Developer Mode for advanced users who need full process transparency.
Anthropic has rolled out four new capabilities on its API: a code execution tool, an MCP connector, a Files API, and a prompt caching function. These tools aim to help developers build more robust AI-driven applications and agents.
Claude Opus 4
Claude Opus 4 is being touted by the company as the most powerful coding model to date with benchmarks like SWE-bench (72.5%) and Terminal-bench (43.2%). The AI model is said to be capable of sustained performance across complex, multi-step tasks. The model powers long-running workflows and supports agent applications that require persistent focus and reasoning.
Claude Sonnet 4
Claude Sonnet 4, on the other hand, is said to be a substantial upgrade from Sonnet 3.7, balancing high performance with efficiency. It is claimed to achieve a 72.7% score on SWE-bench and is designed for both internal use and third-party deployment. The model has already been adopted by GitHub as the core of its new Copilot coding agent.
Both models are accessible via the Claude Pro, Max, Team, and Enterprise plans, with Sonnet 4 also available to free-tier users. Pricing remains unchanged from the previous generation. The Claude 4 launch is available now across the Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI.
Anthropic notes that both models are 65% less likely to take shortcuts in agentic tasks, compared to Sonnet 3.7. They've also introduced “thinking summaries” to condense longer reasoning chains for easier interpretation, while offering a Developer Mode for advanced users who need full process transparency.
Anthropic has rolled out four new capabilities on its API: a code execution tool, an MCP connector, a Files API, and a prompt caching function. These tools aim to help developers build more robust AI-driven applications and agents.
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