OpenAI's GPT-5.6 Self-Optimizes: Slashes Serving Costs by 20%

tszzl · x · 2026-07-31

OpenAI announced that following the deployment of GPT-5.6, the model advanced its efficiency frontier by optimizing its own runtime.

Key improvements include a 20% reduction in serving costs from production GPU kernel enhancements, and over 15% better token-generation efficiency driven by improved speculative decoding. Sam Altman praised the milestone.

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