The AI 5
The five things you need to know in AI today.
By Mallika Iyer
Listen to today’s edition
GPT-5.4 is out in three flavors — standard, Pro, and a reasoning-focused Thinking mode — with a million-token context window and error rates down 33% from GPT-5.2. But the story isn't the model, it's the cadence: GPT-5.2 shipped in December, 5.3 Instant landed last week, and now 5.4. Three generations in one quarter. If you're building an investment thesis around any single model's capability edge, it's already outdated.
The Department of Defense formally designated Anthropic a supply-chain risk, barring every military contractor from working with them — a first for any frontier AI company. Dario Amodei is trying to reopen talks, but the White House isn't optimistic. If you had Anthropic pegged as the responsible-AI-meets-government play, that thesis needs revising. The designation doesn't just affect direct government work; it ripples through every defense contractor evaluating AI partnerships.
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