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Wednesday, April 15, 2026

OpenAI and Anthropic both ship cybersecurity models — then split on who should actually use them

OpenAI GPT-5.4-Cyber vs Anthropic Mythos

We’re expanding Trusted Access for Cyber with additional tiers for authenticated cybersecurity defenders. Customers in the highest tiers can request access to GPT-5.4-Cyber, a version of GPT-5.4 fine-tuned for cybersecurity use cases, enabling more advanced defensive workflows.

Also dominant that day

  • @kimmonismus Claude Opus 4.7 + AI design tool leak — Opus 4.7 leak comes with a prompt-to-website tool and designers start counting the days