For this weeks AI News: Four major AI models launched in five days.

GPT-5.5 went agentic, DeepSeek hit the frontier at one-tenth the price, and Anthropic bet $100 billion on compute. The era of standardizing on one model is over.

Top stories for week 18:

• GPT-5.5 launches as an autonomous agent built to complete tasks, not assist with them
• DeepSeek V4 Pro hits frontier quality at one-tenth the price, on Chinese silicon
• Anthropic signs a $100 billion AWS compute deal and resets API defaults to Opus 4.7
• Google launches Gemini Enterprise, a single runtime for 200+ models including Claude

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