Vaibhav (VB) Srivastav(@reach_vb):Codex analysed production traffic, improved load balancing, rewrote production GPU kernels and ran hundreds of experiments on its own speculative-decoding model. The kernel improvements reduced end-to-end serving costs by 20%, while speculative decoding improved token-generation efficiency by more than 15%.

Vaibhav (VB) Srivastav

@reach_vb

founder mode @OpenAI | ex @huggingface | F1 fan | Here for @at_sofdog’s wisdom | *opinions my own

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Vaibhav (VB) Srivastav@reach_vb

2026.07.29 21:38

Codex analysed production traffic, improved load balancing, rewrote production GPU kernels and ran hundreds of experiments on its own speculative-decoding model. The kernel improvements reduced end-to-end serving costs by 20%, while speculative decoding improved token-generation efficiency by more than 15%.