Merge f75d5817aa into 08c06d5bd9

README.md

@@ -31,6 +31,7 @@ Each playbook includes prerequisites, step-by-step instructions, troubleshooting
 - [Install and Use Isaac Sim and Isaac Lab](nvidia/isaac/)
 - [Optimized JAX](nvidia/jax/)
 - [Live VLM WebUI](nvidia/live-vlm-webui/)
+- [Run models with llama.cpp on DGX Spark](nvidia/llama-cpp/)
 - [LLaMA Factory](nvidia/llama-factory/)
 - [LM Studio on DGX Spark](nvidia/lm-studio/)
 - [Build and Deploy a Multi-Agent Chatbot](nvidia/multi-agent-chatbot/)

nvidia/llama-cpp/README.md

@@ -0,0 +1,269 @@
+# Run models with llama.cpp on DGX Spark
+
+> Build llama.cpp with CUDA and serve models via an OpenAI-compatible API (Gemma 4 31B IT as example)
+
+
+## Table of Contents
+
+- [Overview](#overview)
+- [Instructions](#instructions)
+- [Troubleshooting](#troubleshooting)
+
+---
+
+## Overview
+
+## Basic idea
+
+[llama.cpp](https://github.com/ggml-org/llama.cpp) is a lightweight C/C++ inference stack for large language models. You build it with CUDA so tensor work runs on the DGX Spark GB10 GPU, then load GGUF weights and expose chat through `llama-server`’s OpenAI-compatible HTTP API.
+
+This playbook walks through that stack end to end. As the model example, it uses **Gemma 4 31B IT** - a frontier reasoning model built by Google DeepMind that llama.cpp supports, with strengths in coding, agentic workflows, and fine-tuning. The instructions download its **F16** GGUF from Hugging Face. The same build and server steps apply to other GGUFs (including other sizes in the support matrix below).
+
+## What you'll accomplish
+
+You will build llama.cpp with CUDA for GB10, download a Gemma 4 31B IT model checkpoint, and run **`llama-server`** with GPU offload. You get:
+
+- Local inference through llama.cpp (no separate Python inference framework required)
+- An OpenAI-compatible `/v1/chat/completions` endpoint for tools and apps
+- A concrete validation that **Gemma 4 31B IT** runs on this stack on DGX Spark
+
+## What to know before starting
+
+- Basic familiarity with Linux command line and terminal commands
+- Understanding of git and building from source with CMake
+- Basic knowledge of REST APIs and cURL for testing
+- Familiarity with Hugging Face Hub for downloading GGUF files
+
+## Prerequisites
+
+**Hardware requirements**
+
+- NVIDIA DGX Spark with GB10 GPU
+- Sufficient unified memory for the F16 checkpoint (on the order of **~62GB** for weights alone; more when KV cache and runtime overhead are included)
+- At least **~70GB** free disk for the F16 download plus build artifacts (use a smaller quant from the same repo if you need less disk and VRAM)
+
+**Software requirements**
+
+- NVIDIA DGX OS
+- Git: `git --version`
+- CMake (3.14+): `cmake --version`
+- CUDA Toolkit: `nvcc --version`
+- Network access to GitHub and Hugging Face
+
+## Model Support Matrix
+
+The following models are supported with llama.cpp on Spark. All listed models are available and ready to use:
+
+| Model | Support Status | HF Handle |
+|-------|----------------|-----------|
+| **Gemma 4 31B IT** | ✅ | `ggml-org/gemma-4-31B-it-GGUF` |
+| **Gemma 4 26B A4B IT** | ✅ | `ggml-org/gemma-4-26B-A4B-it-GGUF` |
+| **Gemma 4 E4B IT** | ✅ | `ggml-org/gemma-4-E4B-it-GGUF` |
+| **Gemma 4 E2B IT** | ✅ | `ggml-org/gemma-4-E2B-it-GGUF` |
+| **Nemotron-3-Nano** | ✅ | `unsloth/Nemotron-3-Nano-30B-A3B-GGUF` |
+
+## Time & risk
+
+* **Estimated time:** About 30 minutes, plus downloading the ~62GB example 
+* **Risk level:** Low — build is local to your clone; no system-wide installs required for the steps below
+* **Rollback:** Remove the `llama.cpp` clone and the model directory under `~/models/` to reclaim disk space
+* **Last updated:** 04/02/2026
+  * First Publication
+
+## Instructions
+
+## Step 1. Verify prerequisites
+
+This walkthrough uses **Gemma 4 31B IT** (`gemma-4-31B-it-f16.gguf`) as the example checkpoint. You can substitute another GGUF from [`ggml-org/gemma-4-31B-it-GGUF`](https://huggingface.co/ggml-org/gemma-4-31B-it-GGUF) (for example `Q4_K_M` or `Q8_0`) by changing the `hf download` filename and `--model` path in later steps.
+
+Ensure the required tools are installed:
+
+```bash
+git --version
+cmake --version
+nvcc --version
+```
+
+All commands should return version information. If any are missing, install them before continuing.
+
+Install the Hugging Face CLI:
+
+```bash
+python3 -m venv llama-cpp-venv
+source llama-cpp-venv/bin/activate
+pip install -U "huggingface_hub[cli]"
+```
+
+Verify installation:
+
+```bash
+hf version
+```
+
+## Step 2. Clone the llama.cpp repository
+
+Clone upstream llama.cpp—the framework you are building:
+
+```bash
+git clone https://github.com/ggml-org/llama.cpp
+cd llama.cpp
+```
+
+## Step 3. Build llama.cpp with CUDA
+
+Configure CMake with CUDA and GB10’s **sm_121** architecture so GGML’s CUDA backend matches your GPU:
+
+```bash
+mkdir build && cd build
+cmake .. -DGGML_CUDA=ON -DCMAKE_CUDA_ARCHITECTURES="121" -DLLAMA_CURL=OFF
+make -j8
+```
+
+The build usually takes on the order of 5–10 minutes. When it finishes, binaries such as `llama-server` appear under `build/bin/`.
+
+## Step 4. Download Gemma 4 31B IT GGUF (supported model example)
+
+llama.cpp loads models in **GGUF** format. **gemma-4-31B-it** is available in GGUF from Hugging Face; this playbook uses a F16 variant that balances quality and memory on GB10-class hardware.
+
+```bash
+hf download ggml-org/gemma-4-31B-it-GGUF \
+  gemma-4-31B-it-f16.gguf \
+  --local-dir ~/models/gemma-4-31B-it-GGUF
+```
+
+The F16 file is large (**~62GB**). The download can be resumed if interrupted.
+
+## Step 5. Start llama-server with Gemma 4 31B IT
+
+From your `llama.cpp/build` directory, launch the OpenAI-compatible server with GPU offload:
+
+```bash
+./bin/llama-server \
+  --model ~/models/gemma-4-31B-it-GGUF/gemma-4-31B-it-f16.gguf \
+  --host 0.0.0.0 \
+  --port 30000 \
+  --n-gpu-layers 99 \
+  --ctx-size 8192 \
+  --threads 8
+```
+
+**Parameters (short):**
+
+- `--host` / `--port`: bind address and port for the HTTP API
+- `--n-gpu-layers 99`: offload layers to the GPU (adjust if you use a different model)
+- `--ctx-size`: context length (can be increased up to model/server limits; uses more memory)
+- `--threads`: CPU threads for non-GPU work
+
+You should see log lines similar to:
+
+```
+llama_new_context_with_model: n_ctx = 8192
+...
+main: server is listening on 0.0.0.0:30000
+```
+
+**Keep this terminal open** while testing. Large GGUFs can take several minutes to load; until you see `server is listening`, nothing accepts connections on port 30000 (see Troubleshooting if `curl` reports connection refused).
+
+## Step 6. Test the API
+
+Use a **second terminal on the same machine** that runs `llama-server` (for example another SSH session into DGX Spark). If you run `curl` on your laptop while the server runs only on Spark, use the Spark hostname or IP instead of `localhost`.
+
+```bash
+curl -X POST http://127.0.0.1:30000/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "gemma4",
+    "messages": [{"role": "user", "content": "New York is a great city because..."}],
+    "max_tokens": 100
+  }'
+```
+
+If you see `curl: (7) Failed to connect`, the server is still loading, the process exited (check the server log for OOM or path errors), or you are not curling the host that runs `llama-server`.
+
+Example shape of the response (fields vary by llama.cpp version; `message` may include extra keys):
+
+```json
+{
+  "choices": [
+    {
+      "finish_reason": "length",
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "New York is a great city because it's a living, breathing collage of cultures, ideas, and possibilities—all stacked into one vibrant, never‑sleeping metropolis. Here are just a few reasons that many people ("
+      }
+    }
+  ],
+  "created": 1765916539,
+  "model": "gemma-4-31B-it-f16.gguf",
+  "object": "chat.completion",
+  "usage": {
+    "completion_tokens": 100,
+    "prompt_tokens": 25,
+    "total_tokens": 125
+  },
+  "id": "chatcmpl-...",
+  "timings": {
+    ...
+  }
+}
+```
+
+## Step 7. Longer completion (with example model)
+
+Try a slightly longer prompt to confirm stable generation with **Gemma 4 31B IT**:
+
+```bash
+curl -X POST http://127.0.0.1:30000/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "gemma4",
+    "messages": [{"role": "user", "content": "Solve this step by step: If a train travels 120 miles in 2 hours, what is its average speed?"}],
+    "max_tokens": 500
+  }'
+```
+
+## Step 8. Cleanup
+
+Stop the server with `Ctrl+C` in the terminal where it is running.
+
+To remove this tutorial’s artifacts:
+
+```bash
+rm -rf ~/llama.cpp
+rm -rf ~/models/gemma-4-31B-it-GGUF
+```
+
+Deactivate the Python venv if you no longer need `hf`:
+
+```bash
+deactivate
+```
+
+## Step 9. Next steps
+
+1. **Context length:** Increase `--ctx-size` for longer chats (watch memory; 1M-token class contexts are possible only when the build, model, and hardware allow).
+2. **Other models:** Point `--model` at any compatible GGUF; the llama.cpp server API stays the same.
+3. **Integrations:** Point Open WebUI, Continue.dev, or custom clients at `http://<spark-host>:30000/v1` using the OpenAI client pattern.
+
+The server implements the usual OpenAI-style chat features your llama.cpp build enables (including streaming and tool-related flows where supported).
+
+## Troubleshooting
+
+| Symptom | Cause | Fix |
+|---------|-------|-----|
+| `cmake` fails with "CUDA not found" | CUDA toolkit not in PATH | Run `export PATH=/usr/local/cuda/bin:$PATH` and re-run CMake from a clean build directory |
+| Build errors mentioning wrong GPU arch | CMake `CMAKE_CUDA_ARCHITECTURES` does not match GB10 | Use `-DCMAKE_CUDA_ARCHITECTURES="121"` for DGX Spark GB10 as in the instructions |
+| GGUF download fails or stalls | Network or Hugging Face availability | Re-run `hf download`; it resumes partial files |
+| "CUDA out of memory" when starting `llama-server` | Model too large for current context or VRAM | Lower `--ctx-size` (e.g. 4096) or use a smaller quantization from the same repo |
+| Server runs but latency is high | Layers not on GPU | Confirm `--n-gpu-layers` is high enough for your model; check `nvidia-smi` during a request |
+| `curl: (7) Failed to connect` on port 30000 | No listener yet, wrong host, or crash | Wait for `server is listening`; run `curl` on the same host as `llama-server` (or Spark’s IP); run `ss -tln` and confirm `:30000`; read server stderr for OOM or bad `--model` path |
+| Chat API errors or empty replies | Wrong `--model` path or incompatible GGUF | Verify the path to the `.gguf` file; update llama.cpp if the GGUF requires a newer format |
+
+> [!NOTE]
+> DGX Spark uses Unified Memory Architecture (UMA), which allows flexible sharing between GPU and CPU memory. Some software is still catching up to UMA behavior. If you hit memory pressure unexpectedly, you can try flushing the page cache (use with care on shared systems):
+```bash
+sudo sh -c 'sync; echo 3 > /proc/sys/vm/drop_caches'
+```
+
+For the latest platform issues, see the [DGX Spark known issues](https://docs.nvidia.com/dgx/dgx-spark/known-issues.html) documentation.

nvidia/nemoclaw/README.md

@@ -237,7 +237,7 @@ You should see `nemotron-3-super:120b` in the output.
 This single command handles everything: installs Node.js (if needed), installs OpenShell, clones NemoClaw at the pinned stable release (`v0.0.1`), builds the CLI, and runs the onboard wizard to create a sandbox.
 
 ```bash
-curl -fsSL https://www.nvidia.com/nemoclaw.sh | NEMOCLAW_INSTALL_TAG=v0.0.1 bash
+curl -fsSL https://www.nvidia.com/nemoclaw.sh | NEMOCLAW_INSTALL_TAG=v0.0.4 bash
 ```
 
 The onboard wizard walks you through setup:

nvidia/spark-reachy-photo-booth/README.md

@@ -31,12 +31,14 @@ Spark & Reachy Photo Booth is an interactive and event-driven photo booth demo t
 - **User position tracking** built with `facebookresearch/detectron2` and `FoundationVision/ByteTrack`
 - **MinIO** for storing captured/generated images as well as sharing them via QR-code
 
-The demo is based on a several services that communicate through a message bus.
+The demo is based on several services that communicate through a message bus.
 
 ![Architecture diagram](assets/architecture-diagram.png)
 
+See also the walk-through video for this playbook: [Video](https://www.youtube.com/watch?v=6f1x8ReGLjc)
+
 > [!NOTE]
-> This playbook applies to both the Reachy Mini and Reachy Mini Lite robots. For simplicity, we’ll refer to the robot as Reachy throughout this playbook.
+> This playbook applies to Reachy Mini Lite. Reachy Mini (with on-board Raspberry Pi) might require minor adaptations. For simplicity, we’ll refer to the robot as Reachy throughout this playbook.
 
 ## What you'll accomplish
 
@@ -57,7 +59,7 @@ You'll deploy a complete photo booth system on DGX Spark running multiple infere
 > [!TIP]
 > Make sure your Reachy robot firmware is up to date. You can find instructions to update it [here](https://huggingface.co/spaces/pollen-robotics/Reachy_Mini).
 **Software Requirements:**
-- The official DGX Spark OS image including all required utilities such as Git, Docker, NVIDIA drivers, and the NVIDIA Container Toolkit
+- The official [DGX Spark OS](https://docs.nvidia.com/dgx/dgx-spark/dgx-os.html) image including all required utilities such as Git, Docker, NVIDIA drivers, and the NVIDIA Container Toolkit
 - An internet connection for the DGX Spark
 - NVIDIA NGC Personal API Key (**`NVIDIA_API_KEY`**). [Create a key](https://org.ngc.nvidia.com/setup/api-keys) if necessary. Make sure to enable the `NGC Catalog` scope when creating the key.
 - Hugging Face access token (**`HF_TOKEN`**). [Create a token](https://huggingface.co/settings/tokens) if necessary. Make sure to create a token with _Read access to contents of all public gated repos you can access_ permission.
@@ -77,8 +79,9 @@ All required assets can be found in the [Spark & Reachy Photo Booth repository](
 * **Estimated time:** 2 hours including hardware setup, container building, and model downloads
 * **Risk level:** Medium
 * **Rollback:** Docker containers can be stopped and removed to free resources. Downloaded models can be deleted from cache directories. Robot and peripheral connections can be safely disconnected. Network configurations can be reverted by removing custom settings.
-* **Last Updated:** 01/27/2026
-  * 1.0.0 First Publication
+* **Last Updated:** 04/01/2026
+  * 1.0.0 First publication
+  * 1.0.1 Documentation improvements
 
 ## Governing terms
 Your use of the Spark Playbook scripts is governed by [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0) and enables use of separate open source and proprietary software governed by their respective licenses: [Flux.1-Kontext NIM](https://catalog.ngc.nvidia.com/orgs/nim/teams/black-forest-labs/containers/flux.1-kontext-dev?version=1.1), [Parakeet 1.1b CTC en-US ASR NIM](https://catalog.ngc.nvidia.com/orgs/nim/teams/nvidia/containers/parakeet-1-1b-ctc-en-us?version=1.4), [TensorRT-LLM](https://catalog.ngc.nvidia.com/orgs/nvidia/teams/tensorrt-llm/containers/release?version=1.3.0rc1), [minio/minio](https://hub.docker.com/r/minio/minio), [arizephoenix/phoenix](https://hub.docker.com/r/arizephoenix/phoenix), [grafana/otel-lgtm](https://hub.docker.com/r/grafana/otel-lgtm), [Python](https://hub.docker.com/_/python), [Node.js](https://hub.docker.com/_/node), [nginx](https://hub.docker.com/_/nginx), [busybox](https://hub.docker.com/_/busybox), [UV Python Packager](https://docs.astral.sh/uv/), [Redpanda](https://www.redpanda.com/), [Redpanda Console](https://www.redpanda.com/), [gpt-oss-20b](https://huggingface.co/openai/gpt-oss-20b), [FLUX.1-Kontext-dev](https://huggingface.co/black-forest-labs/FLUX.1-Kontext-dev), [FLUX.1-Kontext-dev-onnx](https://huggingface.co/black-forest-labs/FLUX.1-Kontext-dev-onnx).
@@ -277,7 +280,7 @@ uv sync --all-packages
 Every folder suffixed by `-service` is a standalone Python program that runs in its own container. You must always start the services by interacting with the `docker-compose.yaml` at the root of the repository. You can enable code hot reloading for all the Python services by running:
 
 ```bash
-docker compose up -d --build --watch
+docker compose up --build --watch
 ```
 
 Whenever you change some Python code in the repository the associated container will be updated and automatically restarted.
@@ -315,6 +318,7 @@ The [Writing Your First Service](https://github.com/NVIDIA/spark-reachy-photo-bo
 |---------|-------|-----|
 | No audio from robot (low volume) | Reachy speaker volume set too low by default | Increase Reachy speaker volume to maximum |
 | No audio from robot (device conflict) | Another application capturing Reachy speaker | Check `animation-compositor` logs for "Error querying device (-1)", verify Reachy speaker is not set as system default in Ubuntu sound settings, ensure no other apps are capturing the speaker, then restart the demo |
+| Image-generation fails on first start | Transient initialization issue | Rerun `docker compose up --build -d` to resolve the issue |
 
 If you have any issues with Reachy that are not covered by this guide, please read [Hugging Face's official troubleshooting guide](https://huggingface.co/docs/reachy_mini/troubleshooting).
 

nvidia/trt-llm/README.md

@@ -442,7 +442,7 @@ Replace the IP addresses with your actual node IPs.
 On **each node** (primary and worker), run the following command to start the TRT-LLM container:
 
 ```bash
-docker run -d --rm \
+  docker run -d --rm \
   --name trtllm-multinode \
   --gpus '"device=all"' \
   --network host \
@@ -456,9 +456,11 @@ docker run -d --rm \
   -e OMPI_MCA_rmaps_ppr_n_pernode="1" \
   -e OMPI_ALLOW_RUN_AS_ROOT="1" \
   -e OMPI_ALLOW_RUN_AS_ROOT_CONFIRM="1" \
+  -e CPATH=/usr/local/cuda/include \
+  -e TRITON_PTXAS_PATH=/usr/local/cuda/bin/ptxas \
   -v ~/.cache/huggingface/:/root/.cache/huggingface/ \
   -v ~/.ssh:/tmp/.ssh:ro \
-  nvcr.io/nvidia/tensorrt-llm/release:1.2.0rc6 \
+  nvcr.io/nvidia/tensorrt-llm/release:1.3.0rc5 \
   sh -c "curl https://raw.githubusercontent.com/NVIDIA/dgx-spark-playbooks/refs/heads/main/nvidia/trt-llm/assets/trtllm-mn-entrypoint.sh | sh"
 ```
 
@@ -477,7 +479,7 @@ You should see output similar to:
 
 ```
 CONTAINER ID   IMAGE                                                 COMMAND                  CREATED          STATUS          PORTS     NAMES
-abc123def456   nvcr.io/nvidia/tensorrt-llm/release:1.2.0rc6         "sh -c 'curl https:…"    10 seconds ago   Up 8 seconds              trtllm-multinode
+abc123def456   nvcr.io/nvidia/tensorrt-llm/release:1.3.0rc5         "sh -c 'curl https:…"    10 seconds ago   Up 8 seconds              trtllm-multinode
 ```
 
 ### Step 6. Copy hostfile to primary container

nvidia/vllm/README.md

@@ -54,6 +54,11 @@ The following models are supported with vLLM on Spark. All listed models are ava
 
 | Model | Quantization | Support Status | HF Handle |
 |-------|-------------|----------------|-----------|
+| **Gemma 4 31B IT** | Base | ✅ | [`google/gemma-4-31B-it`](https://huggingface.co/google/gemma-4-31B-it) |
+| **Gemma 4 31B IT** | NVFP4 | ✅ | [`nvidia/Gemma-4-31B-IT-NVFP4`](https://huggingface.co/nvidia/Gemma-4-31B-IT-NVFP4) |
+| **Gemma 4 26B A4B IT** | Base | ✅ | [`google/gemma-4-26B-A4B-it`](https://huggingface.co/google/gemma-4-26B-A4B-it) |
+| **Gemma 4 E4B IT** | Base | ✅ | [`google/gemma-4-E4B-it`](https://huggingface.co/google/gemma-4-E4B-it) |
+| **Gemma 4 E2B IT** | Base | ✅ | [`google/gemma-4-E2B-it`](https://huggingface.co/google/gemma-4-E2B-it) |
 | **Nemotron-3-Super-120B** | NVFP4 | ✅ | [`nvidia/NVIDIA-Nemotron-3-Super-120B-A12B-NVFP4`](https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Super-120B-A12B-NVFP4) |
 | **GPT-OSS-20B** | MXFP4 | ✅ | [`openai/gpt-oss-20b`](https://huggingface.co/openai/gpt-oss-20b) |
 | **GPT-OSS-120B** | MXFP4 | ✅ | [`openai/gpt-oss-120b`](https://huggingface.co/openai/gpt-oss-120b) |
@@ -77,7 +82,7 @@ The following models are supported with vLLM on Spark. All listed models are ava
 | **Nemotron3-Nano** | FP8 | ✅ | [`nvidia/NVIDIA-Nemotron-3-Nano-30B-A3B-FP8`](https://huggingface.co/nvidia/NVIDIA-Nemotron-3-Nano-30B-A3B-FP8) |
 
 > [!NOTE]
-> The Phi-4-multimodal-instruct models require `--trust-remote-code` when launching vLLM.
+> The Phi-4-multimodal-instruct and Nemotron3-Nano models require `--trust-remote-code` when launching vLLM.
 
 > [!NOTE]
 > You can use the NVFP4 Quantization documentation to generate your own NVFP4-quantized checkpoints for your favorite models. This enables you to take advantage of the performance and memory benefits of NVFP4 quantization even for models not already published by NVIDIA.
@@ -89,9 +94,8 @@ Reminder: not all model architectures are supported for NVFP4 quantization.
 * **Duration:** 30 minutes for Docker approach
 * **Risks:** Container registry access requires internal credentials
 * **Rollback:** Container approach is non-destructive.
-* **Last Updated:** 03/12/2026
-  * Added support for Nemotron-3-Super-120B model
-  * Updated container to Feb 2026 release (26.02-py3)
+* **Last Updated:** 04/02/2026
+  * Add support for Gemma 4 model family
 
 ## Instructions
 
@@ -117,13 +121,21 @@ Find the latest container build from https://catalog.ngc.nvidia.com/orgs/nvidia/
 
 ```bash
 export LATEST_VLLM_VERSION=<latest_container_version>
-
 ## example
 ## export LATEST_VLLM_VERSION=26.02-py3
 
+export HF_MODEL_HANDLE=<HF_HANDLE>
+## example
+## export HF_MODEL_HANDLE=openai/gpt-oss-20b
+
 docker pull nvcr.io/nvidia/vllm:${LATEST_VLLM_VERSION}
 ```
 
+For Gemma 4 model family, use vLLM custom containers:
+```bash
+docker pull vllm/vllm-openai:gemma4-cu130
+```
+
 ## Step 3. Test vLLM in container
 
 Launch the container and start vLLM server with a test model to verify basic functionality.
@@ -131,7 +143,13 @@ Launch the container and start vLLM server with a test model to verify basic fun
 ```bash
 docker run -it --gpus all -p 8000:8000 \
 nvcr.io/nvidia/vllm:${LATEST_VLLM_VERSION} \
-vllm serve "Qwen/Qwen2.5-Math-1.5B-Instruct"
+vllm serve ${HF_MODEL_HANDLE}
+```
+
+To run models from Gemma 4 model family, (e.g. `google/gemma-4-31B-it`):
+```bash
+docker run -it --gpus all -p 8000:8000 \
+vllm/vllm-openai:gemma4-cu130 ${HF_MODEL_HANDLE}
 ```
 
 Expected output should include:
@@ -145,7 +163,7 @@ In another terminal, test the server:
 curl http://localhost:8000/v1/chat/completions \
 -H "Content-Type: application/json" \
 -d '{
-    "model": "Qwen/Qwen2.5-Math-1.5B-Instruct",
+    "model": "'"${HF_MODEL_HANDLE}"'",
     "messages": [{"role": "user", "content": "12*17"}],
     "max_tokens": 500
 }'