Henry Broomfield(@HennersBro98):Updates to GPT-5.6 reasoning context One of the quieter but more significant GPT-5.6 updates I'm excited to have played a part in is that reasoning context is preserved across turns, giving: - better KV cache hit rate - reduces latency and cost - less repeated reasoning on long-running tasks - stronger follow-up behavior in complex environments when a task depends on prior hidden thinking

Henry Broomfield

@HennersBro98

Applied AI @OpenAI, Startups team | Research Engineer | prev. Atla (YC), Maths @Cambridge_Uni, ML @ucl

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Henry Broomfield@HennersBro98

2026.07.13 15:46

Updates to GPT-5.6 reasoning context One of the quieter but more significant GPT-5.6 updates I'm excited to have played a part in is that reasoning context is preserved across turns, giving: - better KV cache hit rate - reduces latency and cost - less repeated reasoning on long-running tasks - stronger follow-up behavior in complex environments when a task depends on prior hidden thinking