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The Quantization Conspiracy Theory

Guest writers

There's a ridiculous theory floating around on places like Reddit and Twitter that greedy model companies are selectively dumbing down their models for some profit motive. Typically these conspiracy theories focus on models getting dumber over time, or during peak periods, and the way model companies are doing this is through "quantization".

Nevermind the novelty factor of the models wears off over time, no, its the greedy companies trying to extract more profit from users!

Let's talk about this.

What is quantization

Quantization[1] is the process of truncating model weights to obtain a smaller (and consequently faster running) model. Typically quantization will trade off model intelligence for a reduction in utilization of expensive gpu memory and also require less computation during inference. You can take a model that's been trained with FP16 or FP32 (Floating Point 16/32 Bits), chop off some bits and the models will continue to work pretty well. If you're interested in a deeper dive on model inference, check out this blog post in model inference speed of light calculations[2].

The arguments

Some redditors discuss chat gpt quality issues

Hacker news commentor

Twitter user with subsequent response from an OpenAI employee

Users on Reddit complain about claude code

Are model companies quantizing their models?

Yes, most likely! It's an easy way to get performance gains from a model you already have, improving inference speed and reducing the amount of GPU resources you need for inference.

Are model companies quantizing their models after release?

Their models, no. Their products, maybe.

You need to break down model providers into two groups:

This post will only cover big labs, not open source model hosts. Most of the complaints revolve around OpenAI and Anthropic.

The big labs typically offer a chat product (including coding products) and an API. Each are tailored to different use cases. Chat products like ChatGPT are targeted towards your average consumer, while APIs are typically targeted to business customers and developers.

APIs

A company like OpenAI typically releases a model under a name like gpt-5.2 and will typically also release specific versions of models like gpt-5.2-2025-12-11. The expectation is that model names like gpt-5.2 will be updated as they improve the model, whereas specific model versions like gpt-5.2-2025-12-11 won't change (and will be deprecated faster).

If OpenAI decided to try to pull a fast one over on their customers by "rug pulling" model quality on their API after release, their customers would find out almost immediately.

Consumers of these APIs are usually building products with the models. When you're building a product that uses a black box like a LLM, and you want to ensure the quality of your product is stable, you build an evaluation[3] dataset and run it against your product anytime you change something. With all these customers running evaluations against these models constantly, its impossible that a performance impact will go unnoticed. Any attempts to sneakily implement cost cutting measures will be caught red-handed. A bump in model version could affect evaluation scores, and OpenAI has provided guidance in the past to pin your model version.

The other sure sign would be a sudden and abrupt increase of model response speed across the board. If you change the size of the model that you're serving, you will change the inference speed of the model output. If you take a large model, then cut the weights in half by quantization, you would see a corresponding speed increase due to the lower computation cost. This would be a consistent improvement, but also only tangential evidence. You could also improve inference speed by optimization to the inference software stack (like kernel fusion [4]).

"Oh they could be tricking you somehow by quantizing it and then just adjusting the speed they return the tokens to you!" -> That's seriously ridiculous. They're going to invest the time and infrastructure to build out some kind of system that will drip feed you tokens after? Seriously? Could you build a system to do this? Sure, probably. Would they do it? No. These companies leak like a sieve. If they tried doing that, it would be public pretty quickly.

So let's put API offerings aside and assume that the big labs won't mess with their biggest source of revenue.

Chat Products & Agents

So that leaves the products including chat bots and agents like codex and claude code. Are the companies sneakily quantizing models here?

They probably aren't dynamically quantizing models, but they may change the models used for the experiences!

ChatGPT rolled out their model router with ChatGPT5 which people hated. This router was able to dynamically allocate a user's request to different models. I have no doubt that OpenAI built in measures into this system to be able to dynamically control the flow of traffic to different models, especially with all the free user traffic they receive.

Does this mean that OpenAI was sneakily taking a model then quantizing it after users get used to the powerful version while rubbing their sneaky hands together?

No, however it does mean that they're able to dynamically scale up or down different models and route traffic to them based on current system load. This could potentially result in a different user experience for users that get routed to different models. Also, just because a user is routed to a different model doesn't mean they're getting a "quantized" model. There are many different ways to reduce inference cost including just using a model with fewer parameters, or different architectures (sparser mixture of expert models), speculative decoding, etc. Quantization is just one tool in a researcher's toolkit to reduce resource usage.

Another complaint is that Claude Code gets dumber at certain times. Anthropic did confirm an incident where there were several issues that caused a regression, so that's a possible explanation during that time. Another potential explanation could be context overload[5] where the model's context fills up which the model cannot handle well (even though they say the context is of a certain length).

Intent

The general sentiment around AI companies has been prety sour. I get it, they promised a lot of bullshit and its a really bad look. However, I don't think they're trying to screw over Joe Schmoe by rug pulling them with a dumber model after release. I also specifically think that this idea that these companies are using quantization as the only tool in their belt to reduce GPU usage is ridiculous. If it smells like a conspiracy theory, sounds like a conspiracy theory, then it probably is a conspiracy theory.

What I do think is happening is two-fold:

  1. The technology becomes normalized. People just get used to the thing and the novelty factor wears off. They now start seeing the flaws and are disappointed.
  2. The companies are trying to optimize their product to be more resource efficient trading off product quality when it makes sense. I don't actually think this is a bad thing either, it's engineering. There is always a tradeoff and you do the best you can to provide the best product you can. I don't think they're doing it by sneaking around rug pulling users though.

What I'm pretty sure isn't happening:

  1. The big labs aren't releasing a model then heavily applying quantization after-the-fact. They spend a lot of time and energy training the model, then evaluating their checkpoints to pick the one that performs the best. This process usually includes other inference optimization techniques they may apply to achieve the desired traits from the model (like quantization, speculative decoding, or other inference time improvements). They then release the model, and it goes out into the world as a version. They may make updates to the model, additional training or fixing issues that arise. They most likely release these as new versions of under the same model banner.

  2. They aren't sitting around rubbing their hands trying to screw you out of your tokens. They have a high demand product, limited resources, and are just trying to build a good product for the most part.

  3. Quantization isn't the only tool they have for model performance. Anytime discourse around model quality comes up, "quantization" always comes up like it's some big gotcha. By throwing around quantization, you're really not helping your case! If there are model quality issues, then talk about the model quality instead of coming up with conspiracies about how they're stealing your tokens.

Why did I write this?

A comment I received

I've been seeing this discourse for a while now and its been bothering me. I get the frustration when you use a product and you feel like its getting worse over time. I think its human nature to want to speculate about why it happens, and I just so happen to be a bit of an expert in this area, so it rubs me the wrong way.

Three things to take away from this:

  1. Yes, there could be quality issues with these products. Regressions do happen, and these companies are constantly changing things an optimizing to improve resource utilization.
  2. No, they aren't doing this to screw you over or for some profit motive (yet), and they aren't applying quantization to a new model after-the-fact to bait and switch you.
  3. Quantization isn't just some hammer to bash models with, these are large, complex systems and other things could also affect product quality.

Footnotes


  1. For a deeper dive into quantization, I recommend reading this page on hugging face ↩︎

  2. https://zeux.io/2024/03/15/llm-inference-sol/ ↩︎

  3. Evaluations are test sets where you keep example inputs and outputs and you test your system against to ensure quality has not changed when you make changes to your system. Anybody seriously building products will have evaluations, it's a fact of life when trying to maintain a consistent product. ↩︎

  4. Kernel fusion is a technique that optimizes the software running on the GPU that takes into account GPU architecture to run calculations more efficiently. See Andrej Karpathy's video for a good explanation of kernel fusion ↩︎

  5. Dex Horthy's talk on context management is very interesting. A rule of thumb is that models get dumb when around half their context fills up: https://www.youtube.com/watch?v=rmvDxxNubIg ↩︎