Mixpanel founder Suhail launches Particle with a model that claims 45% token savings

Particle-1, a post-trained version of DeepSeek V4.1 Flash, says it matches accuracy while using roughly 45% fewer output tokens Suhail, the founder and former CEO of Mixpanel, has a new company. It is called Particle, and its pitch fits in one sentence: same answers, fewer words. On October 28, 2026, Suhail announced the San Francisco-based AI startup alongside its first model, Particle-1. The company says the model uses about 45% fewer output tokens on average during evaluations while keeping its accuracy intact. In an industry that bills by the token, that is less a footnote and more the whole business model. Particle-1 is not built from scratch. It is a post-trained version of DeepSeek V4.1 Flash, an existing model that Particle took and refined.

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