Reported speed improvement for GPT-6 Astra and GPT-6.1 Sol is ~50% faster.
Original announcement quoted from @thsottiaux: *"We have optimized the default speed to be ~50% faster across GPT-6 Astra and GPT-6.1 Sol"* — via subscription and Sign in With ChatGPT products/partners, no changes needed, felt within ~2 hours.
@kimmonismus quantified it as 30 tokens/sec → 50 tokens/sec: post
@DotCSV (Spanish) repeated mejora de velocidad del 50%: post