Week 52 2025 saw continued activity from major AI labs despite the holiday slowdown. OpenAI rolled out Atlas, their latest prompt injection security hardening framework designed to strengthen model resilience against adversarial inputs. The team also launched the Year with ChatGPT experience, letting users review their interaction patterns and usage trends over the past year. On the product front, OpenAI shared technical deep-dives on recent audio model updates, detailing improvements in voice synthesis quality and real-time processing capabilities. Meanwhile, Anthropic maintained momentum on their own initiatives during the quieter holiday period. The week underscores ongoing competition in AI safety standards and feature-rich user experiences, with both companies prioritizing security enhancements alongside consumer-facing innovations.