AI News April 19-24, 2026: GPT-5.5, DeepSeek V4 & Mythos Breach
Key stories this week: This Week at a Glance: Key Stories Key Story Company Category Date OpenAI GPT-5.5 Released OpenAI Model Release Apr 23, 2026 ChatGPT Workspace Agents OpenAI Product Launch Apr 22, 2026 DeepSeek V4 Pro & Flash Preview DeepSeek Model Release Apr 24, 2026 Anthropic Mythos Breach Investigation Anthropic Security/News Apr 22, 2026…
