Uh, what? Do you have any source that GPT4 on web is not gpt-4-0613? Because I do not think that is true, my guess is you just have different settings for the decoder
Some time ago when people started reporting degradation, Logan.GPT (Developer Relations @OpenAI) clarified that the API models don't change.
This caused a lot of confusion because people thought that was a claim that ChatGPT doesn't change. He then further clarified that "the models are changing all the time in ChatGPT".
GPT-4 in ChatGPT has changed so much and so frequently. I've spent an inordinate time using both, side by side, and it has mostly failed to replicate the performance of their API offerings. While I don't have examples on hand right now, you can also look for yourself. Just look at the network requests in the web inspector. Here's the description of the Default ChatGPT GPT-4 model:
{
"slug": "gpt-4",
"max_tokens": 4095,
"title": "GPT-4",
"description": "Our most capable model, great for tasks that require creativity and advanced reasoning.",
"tags": [
"gpt4"
],
"capabilities": {},
"product_features": {}
}
Note the context size is 4095. Their model has been heavily optimized for speed and, presumably, cost.
I would guess max_tokens refers to the number of generated tokens, not the size of the context window. That at least is the meaning of max_tokens in the ChatGPT API.
Keep in mind that the information in the link you provided only applies to the developer models, which are only accessible via API and OpenAI Playground.
OpenAI's developer relations person confirmed it a little whiles back:
> [..] I made the comment elsewhere, but the models are always changing in ChatGPT.
