Stabilize Whisper transcription requests

internal/transcription/client.go

@@ -245,6 +245,9 @@ func (c *Client) doOpenAIAudioTranscription(ctx context.Context, provider Provid
 	if err := mw.WriteField("response_format", responseFormat); err != nil {
 		return nil, 0, fmt.Errorf("audio transcription response_format field: %w", err)
 	}
+	if err := mw.WriteField("temperature", "0"); err != nil {
+		return nil, 0, fmt.Errorf("audio transcription temperature field: %w", err)
+	}
 	if responseFormat == "verbose_json" {
 		if err := mw.WriteField("timestamp_granularities[]", "segment"); err != nil {
 			return nil, 0, fmt.Errorf("audio transcription timestamp field: %w", err)

internal/transcription/client_test.go

@@ -28,7 +28,7 @@ func TestWhisperUsesAudioTranscriptionsEndpoint(t *testing.T) {
 	}))
 	defer audioSrv.Close()
 
-	var gotPath, gotModel, gotResponseFormat, gotPrompt string
+	var gotPath, gotModel, gotResponseFormat, gotPrompt, gotTemperature string
 	providerSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		gotPath = r.URL.Path
 		if err := r.ParseMultipartForm(16 << 20); err != nil {
@@ -37,6 +37,7 @@ func TestWhisperUsesAudioTranscriptionsEndpoint(t *testing.T) {
 		gotModel = r.FormValue("model")
 		gotResponseFormat = r.FormValue("response_format")
 		gotPrompt = r.FormValue("prompt")
+		gotTemperature = r.FormValue("temperature")
 		if _, _, err := r.FormFile("file"); err != nil {
 			t.Fatalf("FormFile: %v", err)
 		}
@@ -70,6 +71,9 @@ func TestWhisperUsesAudioTranscriptionsEndpoint(t *testing.T) {
 	if gotResponseFormat != "json" {
 		t.Fatalf("response_format = %q, want json", gotResponseFormat)
 	}
+	if gotTemperature != "0" {
+		t.Fatalf("temperature = %q, want 0", gotTemperature)
+	}
 	if gotPrompt != "" {
 		t.Fatalf("prompt = %q, want empty", gotPrompt)
 	}