feat: add and update openai reasoning_effort tests

Signed-off-by: Alexandros Pappas <apappascs@gmail.com>

Author: apappascs

models/spring-ai-openai/src/test/java/org/springframework/ai/openai/api/OpenAiApiIT.java

@@ -23,7 +23,6 @@
 import okhttp3.mockwebserver.MockResponse;
 import okhttp3.mockwebserver.MockWebServer;
 import okhttp3.mockwebserver.RecordedRequest;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.EnabledIfEnvironmentVariable;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -76,13 +75,13 @@ void chatCompletionStream() {
 	}
 
 	@Test
-	@Disabled("The reasoning_effort option is only available in o1 models.")
 	void validateReasoningTokens() {
 		ChatCompletionMessage userMessage = new ChatCompletionMessage(
-				"If a train travels 100 miles in 2 hours, what is its average speed?", ChatCompletionMessage.Role.USER);
-		ChatCompletionRequest request = new ChatCompletionRequest(List.of(userMessage), "o1", null, null, null, null,
+				"Are there an infinite number of prime numbers such that n mod 4 == 3? Think through the steps and respond.",
+				ChatCompletionMessage.Role.USER);
+		ChatCompletionRequest request = new ChatCompletionRequest(List.of(userMessage), "gpt-5", null, null, null, null,
 				null, null, null, null, null, null, null, null, null, null, null, null, false, null, null, null, null,
-				null, null, null, "low", null, null);
+				null, null, null, "high", null, null);
 		ResponseEntity<ChatCompletion> response = this.openAiApi.chatCompletionEntity(request);
 
 		assertThat(response).isNotNull();

models/spring-ai-openai/src/test/java/org/springframework/ai/openai/chat/OpenAiChatModelIT.java

@@ -789,6 +789,33 @@ void streamWebSearchAnnotationsTest() {
 		logger.info("Full Content: {}", fullContent);
 	}
 
+	@Test
+	void testReasoningEffortParameter() {
+		OpenAiChatOptions chatOptions = OpenAiChatOptions.builder().model("gpt-5").reasoningEffort("high").build();
+
+		Prompt prompt = new Prompt(
+				"Are there an infinite number of prime numbers such that n mod 4 == 3? Think through the steps and respond.",
+				chatOptions);
+		ChatResponse response = this.chatModel.call(prompt);
+
+		assertThat(response).isNotNull();
+		assertThat(response.getResults()).isNotEmpty();
+		assertThat(response.getMetadata()).isNotNull();
+		assertThat(response.getMetadata().getUsage()).isNotNull();
+
+		// Verify that reasoning tokens were used
+		Usage usage = response.getMetadata().getUsage();
+		if (usage instanceof DefaultUsage defaultUsage) {
+			Object nativeUsage = defaultUsage.getNativeUsage();
+			if (nativeUsage instanceof OpenAiApi.Usage openAiUsage) {
+				OpenAiApi.Usage.CompletionTokenDetails completionTokenDetails = openAiUsage.completionTokenDetails();
+				assertThat(completionTokenDetails).isNotNull();
+				assertThat(completionTokenDetails.reasoningTokens()).isNotNull();
+				assertThat(completionTokenDetails.reasoningTokens()).isPositive();
+			}
+		}
+	}
+
 	record ActorsFilmsRecord(String actor, List<String> movies) {
 
 	}