Small updates to main torchao README.md (#3160)

Small updated to main torchao README.md

Author: vkuzo

README.md

@@ -28,13 +28,13 @@
 - [May 25] QAT is now integrated into [Axolotl](https://github.com/axolotl-ai-cloud/axolotl) for fine-tuning ([docs](https://docs.axolotl.ai/docs/qat.html))!
 - [Apr 25] Float8 rowwise training yielded [1.34-1.43x training speedup](https://pytorch.org/blog/accelerating-large-scale-training-and-convergence-with-pytorch-float8-rowwise-on-crusoe-2k-h200s/) at 2k H100 GPU scale
 - [Apr 25] TorchAO is added as a [quantization backend to vLLM](https://docs.vllm.ai/en/latest/features/quantization/torchao.html) ([docs](https://docs.vllm.ai/en/latest/features/quantization/torchao.html))!
-- [Mar 25] Our [2:4 Sparsity paper](https://openreview.net/pdf?id=O5feVk7p6Y) was accepted to SLLM @ ICLR 2025!
-- [Jan 25] Our [integration with GemLite and SGLang](https://pytorch.org/blog/accelerating-llm-inference/) yielded 1.1-2x faster inference with int4 and float8 quantization across different batch sizes and tensor parallel sizes
-- [Jan 25] We added [1-8 bit ARM CPU kernels](https://pytorch.org/blog/hi-po-low-bit-operators/) for linear and embedding ops
 
 <details>
   <summary>Older news</summary>
 
+- [Mar 25] Our [2:4 Sparsity paper](https://openreview.net/pdf?id=O5feVk7p6Y) was accepted to SLLM @ ICLR 2025!
+- [Jan 25] Our [integration with GemLite and SGLang](https://pytorch.org/blog/accelerating-llm-inference/) yielded 1.1-2x faster inference with int4 and float8 quantization across different batch sizes and tensor parallel sizes
+- [Jan 25] We added [1-8 bit ARM CPU kernels](https://pytorch.org/blog/hi-po-low-bit-operators/) for linear and embedding ops
 - [Nov 24] We achieved [1.43-1.51x faster pre-training](https://pytorch.org/blog/training-using-float8-fsdp2/) on Llama-3.1-70B and 405B using float8 training
 - [Oct 24] TorchAO is added as a quantization backend to HF Transformers!
 - [Sep 24] We officially launched TorchAO. Check out our blog [here](https://pytorch.org/blog/pytorch-native-architecture-optimization/)!
@@ -47,8 +47,7 @@
 
 ## 🌅 Overview
 
-TorchAO is a PyTorch-native model optimization framework leveraging quantization and sparsity to provide an end-to-end, training-to-serving workflow
-for AI models. TorchAO works out-of-the-box with `torch.compile()` and `FSDP2` across most HuggingFace PyTorch models. Key features include:
+TorchAO is an easy to use quantization library for native PyTorch. TorchAO works out-of-the-box with `torch.compile()` and `FSDP2` across most HuggingFace PyTorch models. Key features include:
 * Float8 [training](torchao/float8/README.md) and [inference](https://docs.pytorch.org/ao/main/generated/torchao.quantization.Float8DynamicActivationFloat8WeightConfig.html) for speedups without compromising accuracy
 * [MX training and inference](torchao/prototype/mx_formats/README.md), provides MX tensor formats based on native PyTorch MX dtypes (prototype)
 * [Quantization-Aware Training (QAT)](torchao/quantization/qat/README.md) for mitigating quantization degradation
@@ -67,17 +66,17 @@ From the team that brought you the fast series:
 ## 🚀 Quick Start
 
 First, install TorchAO. We recommend installing the latest stable version:
-```
+```bash
 pip install torchao
 ```
 
 Quantize your model weights to int4!
-```
+```python
 from torchao.quantization import Int4WeightOnlyConfig, quantize_
 quantize_(model, Int4WeightOnlyConfig(group_size=32, version=1))
 ```
 Compared to a `torch.compiled` bf16 baseline, your quantized model should be significantly smaller and faster on a single A100 GPU:
-```
+```bash
 int4 model size: 1.25 MB
 bfloat16 model size: 4.00 MB
 compression ratio: 3.2
@@ -86,13 +85,13 @@ bf16 mean time: 30.393 ms
 int4 mean time: 4.410 ms
 speedup: 6.9x
 ```
-For the full model setup and benchmark details, check out our [quick start guide](https://docs.pytorch.org/ao/stable/quick_start.html). Alternatively, try quantizing your favorite model using our [HuggingFace space](https://huggingface.co/spaces/pytorch/torchao-my-repo)!
+See our [quick start guide](https://docs.pytorch.org/ao/stable/quick_start.html) for more details. Alternatively, try quantizing your favorite model using our [HuggingFace space](https://huggingface.co/spaces/pytorch/torchao-my-repo)!
 
 
 ## 🛠 Installation
 
 To install the latest stable version:
-```
+```bash
 pip install torchao
 ```
 
@@ -196,7 +195,7 @@ quantize_(my_model, QATConfig(base_config, step="convert"))
 Users can also combine LoRA + QAT to speed up training by [1.89x](https://dev-discuss.pytorch.org/t/speeding-up-qat-by-1-89x-with-lora/2700) compared to vanilla QAT using this [fine-tuning recipe](https://github.com/pytorch/torchtune/blob/main/recipes/qat_lora_finetune_distributed.py).
 
 
-### Float8
+### Quantized training
 
 [torchao.float8](torchao/float8) implements training recipes with the scaled float8 dtypes, as laid out in https://arxiv.org/abs/2209.05433. With ``torch.compile`` on, current results show throughput speedups of up to **1.5x on up to 512 GPU / 405B parameter count scale** ([details](https://pytorch.org/blog/training-using-float8-fsdp2/)):
 
@@ -211,6 +210,8 @@ Our float8 training is integrated into [TorchTitan's pre-training flows](https:/
 * [Efficient Pre-training of Llama 3-like model architectures using torchtitan on Amazon SageMaker](https://aws.amazon.com/blogs/machine-learning/efficient-pre-training-of-llama-3-like-model-architectures-using-torchtitan-on-amazon-sagemaker/)
 * [Float8 in PyTorch](https://dev-discuss.pytorch.org/t/float8-in-pytorch-1-x/1815)
 
+<details>
+  <summary>Other features (sparse training, memory efficient optimizers)</summary>
 
 ### Sparse Training
 
@@ -242,6 +243,8 @@ optim = CPUOffloadOptimizer(model.parameters(), torch.optim.AdamW, fused=True)
 optim.load_state_dict(ckpt["optim"])
 ```
 
+</details>
+
 <!--
 ## For Developers