Faster, cheaper runs on GPT-5.6 Sol

Builds on GPT-5.6 Sol (available in the Pro tier) now reuse cached context between steps, so multi-step agent runs are noticeably faster and spend fewer credits.

Why it matters. A long agent turn re-sends a lot of the same context on every step. Sol now caches that context, so the repeated parts are much cheaper - more of your credits go toward new work instead of re-processing what the agent already read.