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Thumbnail for: Claude Opus 4 & Sonnet 4: Agentic AI Gets Real
product2/26/2026

Claude Opus 4 Rewrites the Rules for Agentic Coding

Anthropic's Claude Opus 4 and Sonnet 4 deliver record-breaking coding benchmarks, seven-hour autonomous sessions, and hybrid reasoning with live tool use — fundamentally changing what's possible with agentic AI.

AIDeveloper ToolsCoding
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Thumbnail for: Claude Opus 4 & Sonnet 4 Are Here
product2/26/2026

Anthropic Launches Claude 4: Opus 4 and Sonnet 4

Anthropic launched Claude Opus 4 and Sonnet 4 on May 22, 2025, introducing extended thinking with tool use, parallel tool execution, and sustained agentic coding capabilities that set new benchmarks for AI-powered software engineering.

AIDeveloper ToolsCoding
ultrathink.ai
Thumbnail for: Claude 4: Anthropic's Agentic Leap
product2/25/2026

Claude 4 Opus and Sonnet Redefine Agentic AI

Anthropic launched Claude Opus 4 and Sonnet 4 with breakthrough agentic capabilities, hybrid reasoning, and sustained multi-hour performance. Here's why it matters — and how it compares to GPT-5.

AIAI ModelsDeveloper Tools