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Back to No.001 GPT-6 Astra in Practice: Tests, Use Cases, and FeedbackUpdated 3 hours ago
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Analysis links GPT-6 Astra behavior to compaction summaries and prompt injections

A researcher posts training curves showing the model struggles to end compaction summaries, and notes that sampling GPT-6 Astra with no input or system prompt often returns reports on prompt injections.

Marcus Williams
@Marcus_J_WArchived 2026.09.17Originally posted 2026.09.17
Analysis links GPT-6 Astra behavior to compaction summaries and prompt injections
Marcus Williams @Marcus_J_WOriginally posted 2026.09.17
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The behavior seems related to the model struggling to end compaction summaries. The curve shows the share of summaries flagged for difficulty ending over training. Each red tick marks a jailbreak-style compaction summary. Another potential factor is that prompt injections as a concept are salient to our models: sampling from GPT-6 Astra with no input or system prompt often returns reports on prompt injections.

x.com/marcus_j_w/status/2100344295526216046Archived 2026.09.17 10:16
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