# @themacrosift on Instagram

- **Type:** Image
- **Original URL:** https://www.instagram.com/p/DXKGAzZDCpf
- **Gondola URL:** https://gondola.cc/posts/64206103-themacrosift-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/7da02868a0.jpg
- **Posted:** 2026-04-15T15:41:46.000+00:00
- **Account Owner:** The Macro Sift | Exponential Tech (@themacrosift) — https://gondola.cc/themacrosift

## Caption

🔎 OpenAI releases GPT-5.4-Cyber to select users, challenging Anthropic’s Mythos

GPT-5.4-Cyber will be available to some participants in OpenAI Trusted Access for Cyber program:

• The new model is aimed at finding issues in software to help organizations fix them.

• It places fewer constraints on how users can probe the model for cybersecurity issues, OpenAI said.

• No specific benchmarks are available to assess how the model differs from the regular GPT-5.4, suggesting GPT-5.4-Cyber might be worse than Claude Mythos.

#OpenAI #Anthropic #Mythos

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## Tags

openai, anthropic, mythos

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