The Faro chat model focuses on practicality and long-context modeling. It handles various downstream tasks with higher quality, delivering stable and reliable results even when inputs contain lengthy documents or complex instructions. Faro seamlessly works in both English and Chinese.

Faro-Yi-9B

Faro-Yi-9B is an improved Yi-9B-200K with extensive instruction tuning on Fusang-V1. Compared to Yi-9B-200K, Faro-Yi-9B has gained greater capability in various downstream tasks and long-context modeling thanks to the large-scale synthetic data in Fusang-V1.

Just like Yi-9B-200K, Faro-Yi-9B supports up to 200K context length.

How to Use

Faro-Yi-9B uses the chatml template and performs well in both short and long contexts. For longer inputs under 24GB of VRAM, I recommend to use vLLM to have a max prompt of 32K. Setting kv_cache_dtype="fp8_e5m2" allows for 48K input length. 4bit-AWQ quantization on top of that can boost input length to 160K, albeit with some performance impact. Adjust max_model_len arg in vLLM or config.json to avoid OOM.

python

import io
import requests
from PyPDF2 import PdfReader
from vllm import LLM, SamplingParams

llm = LLM(model="wenbopan/Faro-Yi-9B", kv_cache_dtype="fp8_e5m2", max_model_len=100000)

pdf_data = io.BytesIO(requests.get("https://arxiv.org/pdf/2303.08774.pdf").content)
document = "".join(page.extract_text() for page in PdfReader(pdf_data).pages) # 100 pages

question = f"{document}\n\nAccording to the paper, what is the parameter count of GPT-4?"
messages = [ {"role": "user", "content": question} ] # 83K tokens
prompt = llm.get_tokenizer().apply_chat_template(messages, add_generation_prompt=True, tokenize=False)
output = llm.generate(prompt, SamplingParams(temperature=0.8, max_tokens=500))
print(output[0].outputs[0].text)
# Yi-9B-200K:      175B. GPT-4 has 175B \nparameters. How many models were combined to create GPT-4? Answer: 6. ...
# Faro-Yi-9B: GPT-4 does not have a publicly disclosed parameter count due to the competitive landscape and safety implications of large-scale models like GPT-4. ...

Or With Transformers

python

from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained('wenbopan/Faro-Yi-9B', device_map="cuda")
tokenizer = AutoTokenizer.from_pretrained('wenbopan/Faro-Yi-9B')
messages = [
    {"role": "system", "content": "You are a helpful assistant. Always answer with a short response."},
    {"role": "user", "content": "Tell me what is Pythagorean theorem like you are a pirate."}
]
input_ids = tokenizer.apply_chat_template(messages, tokenize=True, add_generation_prompt=True, return_tensors="pt").to(model.device)
generated_ids = model.generate(input_ids, max_new_tokens=512, temperature=0.5)
response = tokenizer.decode(generated_ids[0], skip_special_tokens=True) # Aye, matey! The Pythagorean theorem is a nautical rule that helps us find the length of the third side of a triangle. ...

Performance

Faro-Yi-9B enhances its ability compared to Yi-9B-200K in most dimensions, especially in long-range modeling and bilingual (English, Chinese) understanding. Faro is competitive among all open-sourced models at around 9B parameters.

Benchmark Results

Fact-based Evaluation (Open LLM Leaderboard)

Metric	MMLU	GSM8K	HellaSwag	TruthfulQA	Arc	Winogrande
Yi-9B-200K	65.73	50.49	56.72	33.80	69.25	71.67
Faro-Yi-9B	68.80	63.08	57.28	40.86	72.58	71.11

Long-context Modeling (LongBench)

Name	Average_zh	Average_en	Code Completion
Yi-9B-200K	30.288	36.7071	72.2
Faro-Yi-9B	41.092	40.9536	46.0

Score breakdown

Name	Few-shot Learning_en	Synthetic Tasks_en	Single-Doc QA_en	Multi-Doc QA_en	Summarization_en	Few-shot Learning_zh	Synthetic Tasks_zh	Single-Doc QA_zh	Multi-Doc QA_zh	Summarization_zh
Yi-9B-200K	60.6	22.8	30.9	38.9	25.8	46.5	28.0	49.6	17.7	9.7
Faro-Yi-9B	63.8	40.2	36.2	38.0	26.3	30.0	75.1	55.6	30.7	14.1

Performance on Preference (MT-Bench)

Bilingual Ability (CMMLU & MMLU)

Name	MMLU	CMMLU
Yi-9B-200K	65.73	71.97
Faro-Yi-9B	68.80	73.28

blockblockblock/Faro-Yi-9B-bpw2.25