GPT-5.5 matches heavily hyped Mythos Preview in new cybersecurity tests
New results suggest Mythos' cyber threat isn't "a breakthrough specific to one model."
OpenAI News·
New results suggest Mythos' cyber threat isn't "a breakthrough specific to one model."
April 2026 turned out to be one of the most explosive months in AI history. OpenAI dropped GPT-5.5, Anthropic sparked debate by withholding Claude Mythos, and new releases from Google, DeepSeek, and other Chinese labs pushed reasoning, agentic capabilities, and multimodality to new heights.
OpenAI launched GPT-5.5 on April 23 as what it calls “a new class of intelligence for real work and powering agents,” and the framing is deliberate. OpenAI says it’s the most capable agentic AI model to date, built from the ground up to plan, use tools, check its own output, and work through tasks independently. […] The post GPT-5.5 is OpenAI’s most capable agentic AI model yet–at twice the API price appeared first on AI News.
At the "What's Next with AWS" 2026 event, AWS launched Amazon Quick—an AI assistant for work with a desktop app and expanded integrations—and expanded Amazon Connect into four agentic AI solutions for supply chain, hiring, customer experience, and healthcare. AWS also extended its partnership with OpenAI, bringing models like GPT-5.5, Codex, and Managed Agents to Amazon Bedrock in limited preview.
While OpenAI has improved the model's coding and tool use ability, it still has room to improve in areas where Anthropic dominates.
The latest set of open-source models from DeepSeek are here. While the industry anticipated the dominance of “closed” iterations like GPT-5.5, the arrival of DeepSeek-V4 has ticked the dominance in the favour of open-source AI. By combining a 1.6 trillion parameter MoE architecture with a massive 1 million token context window, DeepSeek-V4 has effectively commoditized […] The post DeepSeek-V4: The Most Powerful Open-Source Model Ever appeared first on Analytics Vidhya.
The model targets the full stack of computer work — coding, research, data analysis, and software operation — without needing a human to supervise every step The post OpenAI Releases GPT-5.5, a Fully Retrained Agentic Model That Scores 82.7% on Terminal-Bench 2.0 and 84.9% on GDPval appeared first on MarkTechPost.
AI agents have revolutionized developer workflows, and their next frontier is knowledge work: processing information, solving complex problems, coming up with new ideas and driving innovation. Codex, OpenAI’s agentic coding application, is enabling this new frontier. It’s now powered by GPT-5.5, OpenAI’s latest frontier model, which runs on NVIDIA GB200 NVL72 rack-scale systems. Over 10,000 […]