fix: OpenAI SDK compat (ResponseTextConfig)

requirements/common.txt

@@ -12,7 +12,7 @@ tokenizers >= 0.21.1  # Required for fast incremental detokenization.
 protobuf # Required by LlamaTokenizer.
 fastapi[standard] >= 0.115.0 # Required by FastAPI's form models in the OpenAI API server's audio transcriptions endpoint.
 aiohttp
-openai >= 1.99.1, < 1.100.0  # For Responses API with reasoning content
+openai >= 1.99.1  # For Responses API with reasoning content
 pydantic >= 2.10
 prometheus_client >= 0.18.0
 pillow  # Required for image processing

requirements/docs.txt

@@ -18,7 +18,7 @@ cbor2
 cloudpickle
 fastapi
 msgspec
-openai < 1.100.0
+openai
 openai-harmony
 partial-json-parser
 pillow

vllm/entrypoints/openai/protocol.py

@@ -20,7 +20,15 @@
 from openai.types.responses import (ResponseFunctionToolCall,
                                     ResponseInputItemParam, ResponseOutputItem,
                                     ResponsePrompt, ResponseReasoningItem,
-                                    ResponseStatus, ResponseTextConfig)
+                                    ResponseStatus)
+
+# Backward compatibility for OpenAI client versions
+try:  # For older openai versions (< 1.100.0)
+    from openai.types.responses import ResponseTextConfig
+except ImportError:  # For newer openai versions (>= 1.100.0)
+    from openai.types.responses import (ResponseFormatTextConfig as
+                                        ResponseTextConfig)
+
 from openai.types.responses.response import ToolChoice
 from openai.types.responses.tool import Tool
 from openai.types.shared import Metadata, Reasoning