docs: Update to include guide for OpenAI LLMs (All-Hands-AI#3552)

* Update docs to include OpenAI LLMs

* Remove broken link

* Update docs/modules/usage/llms/openai-llms.md

docs/modules/usage/llms/llms.md

@@ -26,8 +26,10 @@ The following environment variables might be necessary for some LLMs/providers:
 
 We have a few guides for running OpenHands with specific model providers:
 
+- [OpenAI](llms/openai-llms)
 - [ollama](llms/local-llms)
 - [Azure](llms/azure-llms)
+- [Google](llms/google-llms)
 
 If you're using another provider, we encourage you to open a PR to share your setup!
 

docs/modules/usage/llms/openai-llms.md

@@ -0,0 +1,75 @@
+# OpenAI
+
+OpenHands uses [LiteLLM](https://www.litellm.ai/) to make calls to OpenAI's chat models. You can find their full documentation on OpenAI chat calls [here](https://docs.litellm.ai/docs/providers/openai).
+
+## Configuration
+
+### Manual Configuration
+
+When running the OpenHands Docker image, you'll need to set the following environment variables:
+
+```sh
+LLM_MODEL="openai/<gpt-model-name>" # e.g. "openai/gpt-4o"
+LLM_API_KEY="<your-openai-project-api-key>"
+```
+
+To see a full list of OpenAI models that LiteLLM supports, please visit https://docs.litellm.ai/docs/providers/openai#openai-chat-completion-models.
+
+To find or create your OpenAI Project API Key, please visit https://platform.openai.com/api-keys.
+
+**Example**:
+
+```sh
+export WORKSPACE_BASE=$(pwd)/workspace
+
+docker run -it \
+    --pull=always \
+    -e SANDBOX_USER_ID=$(id -u) \
+    -e LLM_MODEL="openai/<gpt-model-name>" \
+    -e LLM_API_KEY="<your-openai-project-api-key>" \
+    -e WORKSPACE_MOUNT_PATH=$WORKSPACE_BASE \
+    -v $WORKSPACE_BASE:/opt/workspace_base \
+    -v /var/run/docker.sock:/var/run/docker.sock \
+    -p 3000:3000 \
+    --add-host host.docker.internal:host-gateway \
+    --name openhands-app-$(date +%Y%m%d%H%M%S) \
+    ghcr.io/opendevin/opendevin:0.8
+```
+
+### UI Configuration
+
+You can also directly set the `LLM_MODEL` and `LLM_API_KEY` in the OpenHands client itself. Follow this guide to get up and running with the OpenHands client.
+
+From there, you can set your model and API key in the settings window.
+
+## Using OpenAI-Compatible Endpoints
+
+Just as for OpenAI Chat completions, we use LiteLLM for OpenAI-compatible endpoints. You can find their full documentation on this topic [here](https://docs.litellm.ai/docs/providers/openai_compatible).
+
+When running the OpenHands Docker image, you'll need to set the following environment variables:
+
+```sh
+LLM_BASE_URL="<api-base-url>" # e.g. "http://0.0.0.0:3000"
+LLM_MODEL="openai/<model-name>" # e.g. "openai/mistral"
+LLM_API_KEY="<your-api-key>"
+```
+
+**Example**:
+
+```sh
+export WORKSPACE_BASE=$(pwd)/workspace
+
+docker run -it \
+    --pull=always \
+    -e SANDBOX_USER_ID=$(id -u) \
+    -e WORKSPACE_MOUNT_PATH=$WORKSPACE_BASE \
+    -e LLM_BASE_URL="<api-base-url>" \
+    -e LLM_MODEL="openai/<model-name>" \
+    -e LLM_API_KEY="<your-api-key>" \
+    -v $WORKSPACE_BASE:/opt/workspace_base \
+    -v /var/run/docker.sock:/var/run/docker.sock \
+    -p 3000:3000 \
+    --add-host host.docker.internal:host-gateway \
+    --name openhands-app-$(date +%Y%m%d%H%M%S) \
+    ghcr.io/opendevin/opendevin:0.8
+```