Anthropic's Claude Opus 4.6 brings 1M token context and 'agent teams' to take on OpenAI's Codex

Anthropic on Thursday released Claude Opus 4.6, a major upgrade to its flagship artificial intelligence model that the company says plans more carefully, sustains longer autonomous workflows, and outperforms competitors including OpenAI's GPT-5.2 on key enterprise benchmarks — a release that arrives at a tumultuous moment for the AI industry and global software markets.

The launch comes just three days after OpenAI released its own Codex desktop application in a direct challenge to Anthropic's Claude Code momentum, and amid a $285 billion rout in software and services stocks that investors attribute partly to fears that Anthropic's AI tools could disrupt established enterprise software businesses.

For the first time, Anthropic's Opus-class models will feature a 1 million token context window, allowing the AI to process and reason across vastly more information than previous versions. The company also introduced "agent teams" in Claude Code — a research preview ...