OpenAI Ships Responses API Compaction as GPT-6 Astra Maxes Out ARC-AGI-3
stevenheidel · x · 2026-09-04
OpenAI engineer Steven Heidel pointed to the new Compaction docs for the Responses API, a feature for compressing long conversation state to keep agents efficient over long-running tasks. He also shared that with compaction enabled, GPT-6 Astra maxes out the ARC-AGI-3 benchmark.
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