Baseten ships Rust tokenizer it says is 18x faster for Kimi K3

Michael Feil's new package targets a CPU bottleneck that grows as agent prompts approach Kimi K3's one-million-token limit.

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Primary source: X

Why it matters

Million-token agent workloads can move latency away from the GPU and into prompt preparation. Baseten is competing by optimizing that overlooked CPU path and releasing the code for engineers to test.

Illustration of Baseten's Rust tokenizer speeding token processing for the Kimi K3 model, shown as streams of data feeding a CPU labeled Kimi K3.

Baseten model performance engineer Michael Feil (@feilsystem) said in a thread on X on July 27th that he had shipped Baseten Tokenizer, a Rust-backed package built to cut the CPU time required to prepare long prompts for Moonshot AI's Kimi K3 model.…

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