Phi-3 Technical Report
arxiv.org
arxiv.org
That said, I don't think it's impossible for a small model to be very good. I see their "synthetic data" as essentially a way of distilling GPT-4 into smaller models. It would be exciting if a large fraction of the performance of huge models could be transferred to small ones! If true, then Chinchilla-optimal training could make sense again, as you could optimally train a ginormous model and then distill it afterward for efficient inference.
They mention this model's relative weakness in the TruthfulQA eval, since it's more lossy trying to pack 'knowledge' into a small model relative to problem-solving skills (which shine on MMLU)
Regardless - still a very useful thing to have offline and on the fly. Those scores are nothing to scoff at.
Given that these pipelines are likely harder harder to imitate than new architectures like Transformers, I assume there has been and will be an intense focus on synthetic data generation and cleansing. Llama 3 used 15T of tokens in its training corpus vs 4.8T in the "scaled-up" version of phi-3. If you made it to the end of this disjointed ramble I'm sorry
Asking it to answer questions on its own is much more prone to hallucination.
To that end I've been using Llama 3 for summarizing transcripts of YouTube videos. It does a decent job, but... every single time (literally 100% of the time), it will hallucinate a random name for the speaker.* Every time! I thought it might be the system prompt, but there isn't one.
My own prompt is just "{text}\n\n###\n\nPlease summarize the text above."
If I ask it to summarize in bullet points, it doesn't do that.
I'm assuming there was something in the (instruct) training data that strongly encourages that, i.e. a format of summaries beginning with the author's name? Seems sensible enough, but obviously backfires when there's literally no data and it just makes something up...
*In videos where the speaker's name isn't in the transcript. If it's a popular field, it will often come up with something plausible (e.g. Andrew Ng for an AI talk.) If it's something more obscure, it'll dream up something completely random.
"{text}\n\n###\n\nPlease summarize the text above. The text is a video transcript. It may not have the names of the speakers in it. If you need to refer to an unnamed speaker, call them Speaker_1, Speaker_2 and so on."
"using the following documentation to guide you {api documentation}, edit this code {relevant code}, with the following objective: Replace uses of {old API calls} in {some function} with with relevant functions from the supplied documentation"
It mostly works, but if the context is a little to long, sometimes it will just spam the same umlaut or number (always umlaut's or numbers) over and over for example. Perhaps some fine-tuning of parameters like temp. or repetition penalty might fix it, time will tell.
Wait, people still use this benchmark? I hear there's a huge flaw on it.
For examples, fine-tuning the model on 4chan make it scores better on TruthfulQA. It becomes very offensive afterwards though, for obvious reasons. See GPT-4chan [1]
>very offensive
Any cons?
The question that Chinchilla tries to answer is: for a given training budget (which you can think of as dollars or FLOPs), what is the optimal trade off of model size and quantity of training data to get the most performant model? Build a large model and train with less data, or build a smaller one and train with more data?
However, another consideration is minimizing total lifetime cost of the model: training cost + inference cost. You could train a model for longer (costing more) in order to get a given level of performance from a smaller model that will be cheaper for inference, or vice versa. For any given projected model lifetime inference volume, there is going to be a different answer.
It's not that Chinchilla-optimal models stopped making sense, but rather that this sort of consideration has people willing to pump more money (tokens) into smaller models to reduce inference cost for that level of capability.
Distilling can work and there are papers which suggest it does, but we still do not have a reliable mechanism which can distill knowledge from larger teacher models to smaller student models.
This is an important distinction when it comes to assess model collapse risk, which is a risk I think has probably been overstated enough to this point where now its being understated.
It felt a lot like it was overfitted to the exact type of tasks (ie, not a data leak) in the benchmarks but if you were trying something a bit off track if didn't know what to do. At the time my hypothesis was that the small model just didn't have the capacity to generalise well enough, but since then Gemma 2B has come out and seems to be ok.
So now I have no idea why, but yes: the benchmarks for Phi-2 didn't represent how it worked for me on real world tasks where you'd expect it top be ok.
To me, what the parent comment is saying is that even though the benchmarks are cool, it's not super helpful to the every day person. Because if you can't chat with it very well (even for a narrow context) what utility does it have with great benchmarks?
"Our models went through post-training with both supervised instruction fine-tuning, and preference tuning with DPO. We have worked on generating and curating various instruction and preference data. This has improved the model chat capabilities, robustness, as well as its safety."
And on LMSYS English, Llama 3 8B is on par with GPT-4 (not GPT-4-Turbo), as well as Mistral-Large.
Source: https://chat.lmsys.org/?leaderboard (select English in the dropdown)
So we now have an open-source LLM approximately equivalent in quality to GPT-4 that can run on phones? Kinda? Wild.
(I'm sure there's a lot of nuance to it, for one these benchmarks are not so hard to game, we'll see how the dust settles, but still...)
Phi-3-mini 3.8b: 71.2
Phi-3-small 7b: 74.9
Phi-3-medium 14b: 78.2
Phi-2 2.7b: 58.8
Mistral 7b: 61.0
Gemma 7b: 62.0
Llama-3-In 8b: 68.0
Mixtral 8x7b: 69.9
GPT-3.5 1106: 75.3
(these are averages across all tasks for each model, but looking at individual scores shows a similar picture)
> Incredible, beat Llama 3 8B with 3.8B parameters after less than a week of release.
Judging by a single benchmark? Without even trying it out with real world usage?
> And on LMSYS English, Llama 3 8B is on par with GPT-4 (not GPT-4-Turbo), as well as Mistral-Large.
Any potential caveat in such a leaderboard not withstanding, on that leaderboard alone, there is a huge gap between llama 3 8B and Mistral-Large, let alone any of the GPT-4.
By the way, for beating benchmark, "Pretraining on the Test Set Is All You Need"
As I've stated in other comments, yeah... Agreed, I'm stretching it a bit. It's just that any indication of a 3.8B model being in the vicinity of GPT-4 is huge.
I'm sure that when things are properly measured by third-parties it will show a more sober picture. But still, with good fine-tunes, we'll probably get close.
It's a very significant demonstration of what could be possible soon.
Secondly, Llama 3 usually adds first sentences like ‘What a unique question!’ or ‘What an insightful thought’, which might make people like it more than the competition because of the pandering.
While Llama 3 is singular in terms of size to quality ratio, calling the 8B model close to GPT4 would be an overstretch.
Even GPT-4-1106 seems to only sounds better than GPT-4-0613 and works for wider range of prompt. But in a well defined prompt and follow up questions I don't think there is an improvement in reasoning.
in my use cases, better writing makes a better answer
Per the paper, phi3-mini (which is english-only) quantised to 4bit uses 1.8gb RAM and outputs 1212 tokens/sec (correction: 12 tokens/sec) on iOS.
A model on par with GPT-3.5 running on phones!
(weights haven't been released, though)
Phi-1, Phi-1.5, and Phi-2 have all had their weights released, and those weights are available under the MIT License.
Hopefully Microsoft will continue that trend with Phi-3.
> outputs 1212 tokens/sec on iOS
I think you meant "12 tokens/sec", which is still nice, just a little less exciting than a kilotoken/sec.
Thanks! The HTML version on archive.is has messed up markup and shows 1212 instead: https://archive.is/Ndox6
> So we now have an open-source LLM approximately equivalent in quality to GPT-4 that can run on phones
No, not even close ... Even Gemini has huge UX gap comparing to GPT4/Opus, 8B I won't even attempt this argument.
Feels incredible to be living in a time with such neck breaking innovations. What are chances we’ll have a <100B parameter GPT4/Claude Opus model in the next 5 years?
In 5 years time we'll have adaptive compute and the idea of talking about the parameter count of a model will seem as quaint as talking about the cylinder capacity of a jet engine.
What we need is a standardised open harness for open source LLMs to sit in that gives them both access to tools and the ability to write their own, and that's (comparatively speaking) a much easier job than training up another raw frontier LLM: it's just code, and they can write a lot of it.
We’ll have small local models beating gpt-4/Claude opus in 2024. We already have sub 100b models trading blows with former gpt-4 models, and the future is racing toward us. All these little breakthroughs are piling up.
UX matching is a whole different matter and needs a lot of work: Worked heavily with Llama 8B over last days, and Phi 3 today, and the Q+A benchmarks don't tell the full story. Ex. It's nigh impossible to get Llama _70_B to answer in JSON; when Phi sees RAG from search it goes off inventing new RAG material and a new question.
GPT is still the king when talking about multiple languages/knowledge.
I really wish these companies would release the training source, evaluation suites, and code used to curate/filter training data (since safety efforts can lead to biases). Ideally they would also share the training data but that may not be fully possible due to licensing.
Source?
I also don't think they "beat Llama 3 8B"; their own abstract says "rivals that of models such as Mixtral 8x7B and GPT-3.5", "rivals" not even "beats".
Great model, but let's not overplay it.
You are right, I toned down the language, I got a bit overexcited, and I missed the difference in the versions of GPT-4. And LMSYS is a subjective benchmark for what users prefer, which I'm sure has weird inherent biases.
It's just that any signal of an 3.8B model being anywhere in the vicinity of GPT-4 is huge.
12 tokens per second.
No, we don't. LMsys is just one, very flawed benchmark.
Many people treat LMsys as gospel because it's the only large-scale, up-to-date qualitative benchmark. All the numeric benchmarks seem to miss real-world applicability.
But it was slow for its size, generated the longest responses with the most hallucinations, as well as generating the most empty responses. It was also the model ranked with the lowest quality answers.
Some day will be the day their joke book becomes so mediocre it will not stick anymore, but I think they are safe on this one, for now..
To me this is advancing the state of the art as to the impact of data quality, but it doesn't look to me like the phi series have some magical special sauce otherwise. Data of quality and synthetic data creation are not magical moats that Apple can't cross.
I'll say too that I'm psyched to try Phi-3; the sweet spot for me is a model that can be a local coding assistant and still answer random q&a questions with some sophistication. I'm skeptical that 3-8b parameter models will bring the high-level of sophistication sometimes needed in this cycle; there's still a very large gap with the larger models in daily use, despite some often close benchmark scores.
Anyway, Apple-Phi-3 is in no way an impossibility.
They're working on MLX but it only recently got swift bindings. They just don't have the DEVELOPERS DEVELOPERS DEVELOPERS coked out attitude i guess
They’ll be fine.
Are you next going to tell us that the CIA's access to iCloud data protects their users from terrorism too?
What I’m trying to say is that user experience is now as key as the model smarts and these barely touching gpt4 models cannot beat OpenAI right now as a whole package.
i mean, fair
It costs so little to share the credit if someone was an asset.
I'd trust Microsoft to do decontamination testing, although the paper doesn't explicitly mention it other than "The prompts and number of shots are part of a Microsoft internal tool to evaluate language models, and in particular we did no optimization to the pipeline for the phi-3 models."
2. Since GPT-4 is seen as the very best general-purpose LLM in existence, it makes sense to emulate its performance with less resources.
3. Phi models are also trained with other high-quality data
tl;dr I'm looking forward to having lots of models (ideally models) trained with a wide range of parameters to narrow down "what is actually optimal"
I think there is an interesting tradeoff of data quality and data volume, though
(Eg if we train with the highest quality 10% of our data, does the model improve if we use the other 90%? What if we increase our data size by 10x?)