AI BriefingChatGPT Search Adopts site: Operator Extensively
·2026.08.21 08:57
Key point
Following the GPT-5.6 update, the usage rate of the site: operator in ChatGPT Search surged to 16-17%.
Details
According to data from Promptwatch, a GEO (Generative Engine Optimization) monitoring tool, the behavior of ChatGPT Search changed with the deployment of GPT-5.6.
- Surge in site: Operator Usage: Starting August 8, the proportion of ChatGPT Search fan-out queries containing the site: operator spiked to 16-17%. Previously, it remained at the level of 0.3-0.5%.
- Decreased Reliance on Reddit: During the same period, the likelihood of Reddit being cited in search results significantly decreased.
These changes align with the GPT-5.6 Sol update announced by OpenAI on August 6, suggesting that the search tool is more actively utilizing specific domain restriction features.
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