doc: fix typos OpenAIResponse -> OpenAIResponses

EYH0602 · EYH0602 · commit 01c433ae2a55 · 2025-09-30T17:09:42.000-07:00
diff --git a/README.md b/README.md
@@ -186,7 +186,7 @@ you can still use it by specifying the SDK client directly.
 We take OpenAI GPT-4.1 as and example here.
 
 ```python
-from tfbench.lm import OpenAIResponse
+from tfbench.lm import OpenAIResponses
 from tfbench import run_one_model
 
 model = "gpt-4.1"
