Weekly AI Roundup: OpenAI Ships GPT-5.5 Six Weeks After 5.4, Hackers Breach the Model Anthropic Said Was Too Dangerous to Release, and DeepSeek V4 Goes Open-Weight Just to Watch
OpenAI's version numbers are now a sprint counter, Anthropic's Mythos gets accessed by the exact people it wasn't supposed to reach, and DeepSeek drops 1.6T params under the MIT license because why not.
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