diff --git a/docs/features/tool_calling.md b/docs/features/tool_calling.md
index 7b6945cb71c27..d113652cbb710 100644
--- a/docs/features/tool_calling.md
+++ b/docs/features/tool_calling.md
@@ -396,6 +396,24 @@ Supported models:
 
 Flags: `--tool-call-parser gigachat3`
 
+### GPT-OSS Models (`openai`)
+
+OpenAI's GPT-OSS models use a special token-based format (Harmony format) for tool calling that is parsed using the `openai` tool parser.
+
+Supported models:
+
+* `openai/gpt-oss-120b`
+* `openai/gpt-oss-20b`
+
+Known limitations:
+
+* Only `tool_choice='auto'` is currently supported
+* Streaming tool calls have limited support
+
+Flags: `--tool-call-parser openai --enable-auto-tool-choice`
+
+For more detailed examples and usage patterns, see the [GPT-OSS cookbook](https://docs.vllm.ai/projects/recipes/en/latest/OpenAI/GPT-OSS.html).
+
 ### Models with Pythonic Tool Calls (`pythonic`)
 
 A growing number of models output a python list to represent tool calls instead of using JSON. This has the advantage of inherently supporting parallel tool calls and removing ambiguity around the JSON schema required for tool calls. The `pythonic` tool parser can support such models.