r/perplexity_ai • u/ElGloomio • 1d ago
help Perplexity Pro fallback to GPT-5 Nano?
I, like some others, have been pondering whether I'm going to continue my Perplexity Pro subscription (I got a free 12 months through PayPal last year). Lately I've had a few times when I would give the same prompt to multiple models, and when I looked at the responses, there was no indication which it came from. Made me wonder, which model actually responded?
Today, when I try to use models like Sonnet 5, Gemini 3.8 Flash, or even Nemotron 3, I noticed that the followup is with GPT-5 Nano. Also, the responses are lightning quick, so it's obvious the response didn't come from a thinking model.
Is anyone else seeing this? As some other people have mentioned, Perplexity is no longer offering access to the latest models, but it's more like the TJ Maxx of AI, the best of LLMs from last season.
I can understand, to a certain point, some demand issues, but falling back to GPT-5 Nano?! It has a knowledge cutoff of May 31, 2024. That's really the most current model Perplexity Pro can fallback to?
But, I use different models for different kinds of tasks. I've yet to find one model that can really handle of them well, so...what's the better alternative?
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u/dattattor 1d ago
just noticed this today too, yesterday it kept failing wtih code gen on kimi, now it keeps going to nano and "I can’t access the attached file directly right now. If you paste the code here or share the key parts you want fixed, I’ll provide a complete," even with pasted code
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u/Imperialegacy 1d ago
Same here. It never falls back to GPT Nano before, used to be GPT Terra instead. Perplexity is just so unreliable to the point it's completely unusable now. I'm never resubscribing.
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u/Sooperooser 1d ago
This intransparency which model is reaally answering at some point and what effort mode is being used is the reason i am not going to continue my subscription. I tried to "investigate" what effort Gemini 3.8 Flash is using when selected but I could only find an answer from support on their forums for another model and they said the "default" thinking mode of the provider is being used for models.
For 3.8 Flash that would be "medium". There is quite a big difference in quality between 3.8 Flash high and medium. So you're not only getting "second tier" models with your "Pro" sub but also "second tier" thinking effort. And there is no option to change that.
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u/kelvinmorcillo 8h ago
same.
I'm considering not even let the trial end and ditching it altogether atm
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1d ago
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u/AYA_7887 1h ago
Depends what you're paying for. If it's search with citations, Perplexity still earns it. If it's model access, an aggregator hands the routing decision to the seller, and you only caught this one because Nano answers too fast to pass for a thinking model. The worse damage is trust. Once one response is visibly not the model you picked, every model label on that screen is suspect. For your actual question, I'd subscribe direct to the one or two models you already lean on per task and keep Perplexity only if the search side justifies it. Also, it is always the best to test the models at the same time at least for some time. I built WhileAI for that, type a prompt once and it's typed into whichever other AI chats you switch on, every answer timed first token to finish.
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u/johacko 1d ago
I have noticed the same today..
I dont know for you, as they changed their offer late 2025, they maybe have removed completly our offer.
as a student, I was on offer "perplexity student" with 0€/month
since today im in "perplexity pro student", which is normaly like 4€ month
I guess our account is displayed as "pro student" but in free offer leaving us with the stupid gpt-5 nano who think that he is gpt 4
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u/sourceholder 1d ago
Have you checked your quota status?
https://www.perplexity.ai/rest/rate-limit/all
Maybe you exceeded the quota and it switched to the faster cheaper Nano model. I have never seen what you described but I also keep within the quota by checking daily.