According to posts on X, Codex lead Tibo said GPT-6 Astra and GPT-6.1 Sol would get a speed increase of about 50% at default speed. Posts say it applies to ChatGPT subscribers and supported partner apps, without a settings change.
PC Watch also reported the speed increase. However, posts describe mixed results: one says a later test reached about 35 tokens per second, while others note earlier slowdowns. New Runtime has not found an official statement from OpenAI. An official post or updated documentation describing the speed change would help confirm the report.