fix: implement improved headers for anthropic to support 8k outputs (#1654)

common/config/config.go

@@ -147,7 +147,6 @@ var InitialRootAccessToken = os.Getenv("INITIAL_ROOT_ACCESS_TOKEN")
 
 var GeminiVersion = env.String("GEMINI_VERSION", "v1")
 
-
 var OnlyOneLogFile = env.Bool("ONLY_ONE_LOG_FILE", false)
 
 var RelayProxy = env.String("RELAY_PROXY", "")

relay/adaptor/anthropic/adaptor.go

@@ -3,12 +3,14 @@ package anthropic
 import (
 	"errors"
 	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
 	"github.com/gin-gonic/gin"
 	"github.com/songquanpeng/one-api/relay/adaptor"
 	"github.com/songquanpeng/one-api/relay/meta"
 	"github.com/songquanpeng/one-api/relay/model"
-	"io"
-	"net/http"
 )
 
 type Adaptor struct {
@@ -31,6 +33,13 @@ func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Request, meta *me
 	}
 	req.Header.Set("anthropic-version", anthropicVersion)
 	req.Header.Set("anthropic-beta", "messages-2023-12-15")
+
+	// https://x.com/alexalbert__/status/1812921642143900036
+	// claude-3-5-sonnet can support 8k context
+	if strings.HasPrefix(meta.ActualModelName, "claude-3-5-sonnet") {
+		req.Header.Set("anthropic-beta", "max-tokens-3-5-sonnet-2024-07-15")
+	}
+
 	return nil
 }
 

relay/adaptor/vertexai/registry.go

@@ -32,7 +32,6 @@ func init() {
 	}
 }
 
-
 type innerAIAdapter interface {
 	ConvertRequest(c *gin.Context, relayMode int, request *model.GeneralOpenAIRequest) (any, error)
 	DoResponse(c *gin.Context, resp *http.Response, meta *meta.Meta) (usage *model.Usage, err *model.ErrorWithStatusCode)

relay/adaptor/vertexai/token.go

@@ -26,7 +26,6 @@ type ApplicationDefaultCredentials struct {
 	UniverseDomain          string `json:"universe_domain"`
 }
 
-
 var Cache = cache.New(50*time.Minute, 55*time.Minute)
 
 const defaultScope = "https://www.googleapis.com/auth/cloud-platform"

relay/meta/relay_meta.go

@@ -23,7 +23,9 @@ type Meta struct {
 	APIType      int
 	Config       model.ChannelConfig
 	IsStream     bool
+	// OriginModelName is the model name from the raw user request
 	OriginModelName string
+	// ActualModelName is the model name after mapping
 	ActualModelName string
 	RequestURLPath  string
 	PromptTokens    int // only for DoResponse