Nvidia unveiled its 550 billion-parameter open AI model Nemotron 3 Ultra and said it has started mass production of its next AI server platform Vera Rubin. CEO Jensen Huang introduced both at a GTC Taipei 2026 keynote. Nvidia said the model will be released in open form this week and highlighted competitiveness in benchmarks and token generation speed, while an external index score trailed a leading Chinese model.

AI chip designer Cerebras put the 1 trillion-parameter open-weight model Kimi K2.6 into its enterprise inference service and achieved 981 tokens per second, a pace it says is the world’s fastest. It also cut the time to complete 500 output tokens from a 10,000-token input to 5.6 seconds, versus 163.7 seconds on the official Kimi endpoint. The company is pursuing an IPO and reported 2025 revenue of $510 million and net profit of $238 million.