How Has OpenAI Released a 20x Faster Model?

Among the plethora of mo

dels released recently, one has stood out: OpenAI’s new frontier coding model, which responds at 1,000 tokens/second. For reference, that’s around 20 times faster than the frontier competition. Interestingly, the answer has little to do with the model and much to do with a much lesser-known company that will very likely IPO this year. Reaching Escape Velocity GPT-5.3 Codex Spark is a new OpenAI model in preview mode that’s only available to Pro users that is fast. Absurdly fast. I apologize in advance for the quality, but the comparison below really gives you an idea of how fast this model is to build a snake game (I shortened it, but the other model took 30–40 seconds more):