Reddit sinks on heavy volumes, social media chatter of reduced referral traffic from ChatGPT
ChatGPT thinks OpenAI’s recent model tweak is a plausible explanation.
Reddit is getting smoked this morning amid elevated trading activity, deepening a rout that has seen shares sink 15% in the trailing eight sessions heading into today.
The consternation appears to be driven by reports on social media that suggest ChatGPT is using Reddit content as a source much less often.
The best example:
Apparently ChatGPT is not using Reddit much anymore for their answers. I guess they realized that what random people say can’t be considered a trusted source after all. You can all stop spamming it with your fake brand mentions now. pic.twitter.com/PrDuFJhpNz
— Andrea Bosoni (@theandreboso) September 30, 2025
OpenAI updated its model on September 12 — just about the time these referrals apparently began to slide. I asked ChatGPT (who better?) to explain whether any tweaks made could have produced such an effect. Here’s what it told me:
What is possible/plausible from indirect/architectural changes
Even though there is no explicit statement, the kinds of changes made (or the framing of the update) could allow or encourage behavior shifts that indirectly reduce Reddit referrals. Some possibilities:
Stricter guardrails/stronger authority constraints
Because the update emphasizes clarity and stricter authority levels, internal policies might now more heavily vet or filter which external sources the model is allowed to cite, especially user‑generated content (like Reddit).Reprioritization of source quality/authority levels
The model spec changes might shift the implicit priorities, favoring more authoritative, vetted sources (academic, official, news) over forums, social media, or user‑generated content by default.Nonpublic internal adjustments
Even without a public note, internal (nonpublic) rule changes might have been made alongside the September 12 rollout — e.g. adjustments in how citations are ranked, filters applied, or which domains are considered “safe” to reference.Cascading effect from other policies/safety rules
The new spec may create constraints (or higher “cost” in internal scoring) for referencing less controlled sources (where misinformation risk is higher). Over time, that could reduce those referrals as a side effect.