test: add openai gpt o4 mini to the test matrix

Author: andreynering

providertests/builders_test.go

@@ -19,6 +19,7 @@ type builderPair struct {
 
 var languageModelBuilders = []builderPair{
 	{"openai-gpt-4o", builderOpenaiGpt4o},
+	{"openai-gpt-4o-mini", builderOpenaiGpt4oMini},
 	{"anthropic-claude-sonnet", builderAnthropicClaudeSonnet4},
 }
 
@@ -34,6 +35,18 @@ func builderOpenaiGpt4o(r *recorder.Recorder) (ai.LanguageModel, error) {
 	return model, nil
 }
 
+func builderOpenaiGpt4oMini(r *recorder.Recorder) (ai.LanguageModel, error) {
+	provider := openai.New(
+		openai.WithAPIKey(os.Getenv("OPENAI_API_KEY")),
+		openai.WithHTTPClient(&http.Client{Transport: r}),
+	)
+	model, err := provider.LanguageModel("gpt-4o-mini")
+	if err != nil {
+		return nil, err
+	}
+	return model, nil
+}
+
 func builderAnthropicClaudeSonnet4(r *recorder.Recorder) (ai.LanguageModel, error) {
 	provider := anthropic.New(
 		anthropic.WithAPIKey(os.Getenv("ANTHROPIC_API_KEY")),