[00:02] second. In that time, a new AI model called Jeff can read a customer complaint and decide whether to refund, escalate, or reject it. Type safe AI says its response time can be as low as 70 milliseconds. On September 15, 2026, [00:17] Type safe AI introduced Jeff, which is a new kind of AI called a system one model. Unlike ChatGPT or Claude, Jeff isn't designed to write essays, generate code, or hold conversations. It's built to make decisions and make them [00:30] incredibly fast. Think about a customer support system handling thousands of requests. A traditional language model might generate an explanation word by ticket. Jeff takes a different approach. It [00:44] evaluates predefined choices and returns probabilities directly without generating a long text response. And that's where the speed comes from. Traditional language models generate output tokens one after another, while [00:56] parallel. According to Type safe AI, Jeff responds in 70 to 500 milliseconds. In the company's own workflow benchmarks, it reported speeds up to 193.6 times faster than Claude's on its 5 and [01:12] costs up to 444.6 times lower. But here's the catch. Those are company reported results for specific decision-making tasks and not proof that Jeff is faster or better at everything. In fact, independent testing [01:27] has found that some competing models still outperform Jeff on accuracy. So, is Jeff replacing ChatGPT? Not really. ChatGPT can handle open-ended conversations and complex tasks, while Jeff is designed for fast and structured [01:41] So, the future might not be about choosing one AI model. It might be about you use Jeff in your next AI application? Comment yes or no and subscribe to Simplilearn for more such amazing tech insights.