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Chapter 1: Resources

The 90-Day Obsolescence Cycle · Live model timeline

Companion resources for Chapter 1. Full text is in the book.

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Live: AI Model Release Timeline

The book shows the timeline as of February 2026. Below is the current state — proof that the 90-day cycle continues.

Stanford AI Index 2026

Annual report on AI progress — funding, models, benchmarks, jobs.

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Chatbot Arena

Live rankings of LLMs by user votes. See which models lead today.

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Exercise

Check the date of this chapter in the book, then visit the links above. How many new models have been released since? This is the 90-day cycle in action.

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