NVIDIA details GPT-6 Astra Ultrafast with up to 8× faster token generation on Blackwell

What changed

NVIDIA described the infrastructure behind GPT-6 Astra Ultrafast on October 1. The mode runs on NVIDIA Blackwell GPUs, is available through the OpenAI API and is also offered to eligible ChatGPT Work and Codex users. NVIDIA says inference optimizations, including work performed with OpenAI models, deliver up to 8× faster token generation than Astra Standard, which can shorten edit-test-debug and tool-use loops for coding agents. The 8× figure is a vendor-reported performance claim rather than an independent benchmark.