OpenAI's new Ultrafast tier runs GPT-5.6 Sol on Cerebras chips
Ultrafast, a new service tier in the OpenAI API, pushes GPT-5.6 Sol to up to 750 output tokens per second. OpenAI says that's up to 14x the model's normal speed.
The tier is in preview and starts with a limited group of API customers. OpenAI plans to widen access as capacity grows.
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DeepSeek Chat's Expert Mode now runs on V4-Pro
DeepSeek Chat's Expert Mode now routes to V4-Pro: 1.6 trillion total parameters, 49 billion active, and the model is available through the API as well. The GA build is labeled V4 Pro 0813 and went live August 12, 2026.
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