feat: supper whisper now (close #197)

common/model-ratio.go

@@ -31,7 +31,7 @@ var ModelRatio = map[string]float64{
 	"text-davinci-003":          10,
 	"text-davinci-edit-001":     10,
 	"code-davinci-edit-001":     10,
-	"whisper-1":                 10,
+	"whisper-1":                 15, // $0.006 / minute -> $0.006 / 150 words -> $0.006 / 200 tokens -> $0.03 / 1k tokens
 	"davinci":                   10,
 	"curie":                     10,
 	"babbage":                   10,