feat: add deepseek-reasoner & gemini-2.0-flash-thinking-exp-01-21 (#2045)

* feat: add MILLI_USD constant and update pricing for deepseek services

* feat: add support for new Gemini model version 'gemini-2.0-flash-thinking-exp-01-21'

relay/adaptor/gemini/adaptor.go

@@ -7,7 +7,6 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
-	"github.com/songquanpeng/one-api/common/config"
 	"github.com/songquanpeng/one-api/common/helper"
 	channelhelper "github.com/songquanpeng/one-api/relay/adaptor"
 	"github.com/songquanpeng/one-api/relay/adaptor/openai"
@@ -24,8 +23,11 @@ func (a *Adaptor) Init(meta *meta.Meta) {
 }
 
 func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
-	defaultVersion := config.GeminiVersion
-	if meta.ActualModelName == "gemini-2.0-flash-exp" {
+	var defaultVersion string
+	switch meta.ActualModelName {
+	case "gemini-2.0-flash-exp",
+		"gemini-2.0-flash-thinking-exp",
+		"gemini-2.0-flash-thinking-exp-01-21":
 		defaultVersion = "v1beta"
 	}
 

relay/adaptor/gemini/constants.go

@@ -7,5 +7,5 @@ var ModelList = []string{
 	"gemini-1.5-flash", "gemini-1.5-pro",
 	"text-embedding-004", "aqa",
 	"gemini-2.0-flash-exp",
-	"gemini-2.0-flash-thinking-exp",
+	"gemini-2.0-flash-thinking-exp", "gemini-2.0-flash-thinking-exp-01-21",
 }

relay/adaptor/vertexai/gemini/adapter.go

@@ -18,7 +18,8 @@ var ModelList = []string{
 	"gemini-pro", "gemini-pro-vision",
 	"gemini-1.5-pro-001", "gemini-1.5-flash-001",
 	"gemini-1.5-pro-002", "gemini-1.5-flash-002",
-	"gemini-2.0-flash-exp", "gemini-2.0-flash-thinking-exp",
+	"gemini-2.0-flash-exp",
+	"gemini-2.0-flash-thinking-exp", "gemini-2.0-flash-thinking-exp-01-21",
 }
 
 type Adaptor struct {