fix(openai): handle reasoning_effort (#11868)

api/types.go

@@ -769,8 +769,8 @@ func (t *ThinkValue) IsString() bool {
 	return ok
 }
 
-// AsBool returns the value as a bool (true if enabled in any way)
-func (t *ThinkValue) AsBool() bool {
+// Bool returns the value as a bool (true if enabled in any way)
+func (t *ThinkValue) Bool() bool {
 	if t == nil || t.Value == nil {
 		return false
 	}
@@ -786,8 +786,8 @@ func (t *ThinkValue) AsBool() bool {
 	}
 }
 
-// AsString returns the value as a string
-func (t *ThinkValue) AsString() string {
+// String returns the value as a string
+func (t *ThinkValue) String() string {
 	if t == nil || t.Value == nil {
 		return ""
 	}

openai/openai.go

@@ -103,6 +103,7 @@ type ChatCompletionRequest struct {
 	ResponseFormat   *ResponseFormat `json:"response_format"`
 	Tools            []api.Tool      `json:"tools"`
 	Reasoning        *Reasoning      `json:"reasoning,omitempty"`
+	ReasoningEffort  *string         `json:"reasoning_effort,omitempty"`
 }
 
 type ChatCompletion struct {
@@ -541,10 +542,6 @@ func fromChatRequest(r ChatCompletionRequest) (*api.ChatRequest, error) {
 		options["top_p"] = 1.0
 	}
 
-	if r.Reasoning != nil {
-		options["reasoning"] = *r.Reasoning.Effort
-	}
-
 	var format json.RawMessage
 	if r.ResponseFormat != nil {
 		switch strings.ToLower(strings.TrimSpace(r.ResponseFormat.Type)) {
@@ -560,9 +557,15 @@ func fromChatRequest(r ChatCompletionRequest) (*api.ChatRequest, error) {
 
 	var think *api.ThinkValue
 	if r.Reasoning != nil {
+		options["reasoning"] = *r.Reasoning.Effort
 		think = &api.ThinkValue{
 			Value: *r.Reasoning.Effort,
 		}
+	} else if r.ReasoningEffort != nil {
+		options["reasoning"] = *r.ReasoningEffort
+		think = &api.ThinkValue{
+			Value: *r.ReasoningEffort,
+		}
 	}
 
 	return &api.ChatRequest{

server/prompt.go

@@ -44,8 +44,8 @@ func chatPrompt(ctx context.Context, m *Model, tokenize tokenizeFunc, opts *api.
 		thinkVal := false
 		thinkLevel := ""
 		if think != nil {
-			thinkVal = think.AsBool()
-			thinkLevel = think.AsString()
+			thinkVal = think.Bool()
+			thinkLevel = think.String()
 		}
 		var b bytes.Buffer
 		if err := m.Template.Execute(&b, template.Values{Messages: append(system, msgs[i:]...), Tools: tools, Think: thinkVal, ThinkLevel: thinkLevel, IsThinkSet: think != nil}); err != nil {
@@ -105,8 +105,8 @@ func chatPrompt(ctx context.Context, m *Model, tokenize tokenizeFunc, opts *api.
 	thinkVal := false
 	thinkLevel := ""
 	if think != nil {
-		thinkVal = think.AsBool()
-		thinkLevel = think.AsString()
+		thinkVal = think.Bool()
+		thinkLevel = think.String()
 	}
 	if err := m.Template.Execute(&b, template.Values{Messages: append(system, msgs[currMsgIdx:]...), Tools: tools, Think: thinkVal, ThinkLevel: thinkLevel, IsThinkSet: think != nil}); err != nil {
 		return "", nil, err

server/routes.go

@@ -205,7 +205,7 @@ func (s *Server) GenerateHandler(c *gin.Context) {
 
 	// Validate Think value: string values currently only allowed for gptoss models
 	if req.Think != nil && req.Think.IsString() && !useHarmony {
-		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("think value %q is not supported for this model", req.Think.AsString())})
+		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("think value %q is not supported for this model", req.Think.String())})
 		return
 	}
 
@@ -213,7 +213,7 @@ func (s *Server) GenerateHandler(c *gin.Context) {
 	if req.Suffix != "" {
 		caps = append(caps, model.CapabilityInsert)
 	}
-	if req.Think != nil && req.Think.AsBool() {
+	if req.Think != nil && req.Think.Bool() {
 		caps = append(caps, model.CapabilityThinking)
 		// TODO(drifkin): consider adding a warning if it's false and the model
 		// doesn't support thinking. It's not strictly required, but it can be a
@@ -288,10 +288,10 @@ func (s *Server) GenerateHandler(c *gin.Context) {
 			values.Messages = append(msgs, api.Message{Role: "user", Content: req.Prompt})
 		}
 
-		values.Think = req.Think != nil && req.Think.AsBool()
+		values.Think = req.Think != nil && req.Think.Bool()
 		values.ThinkLevel = ""
 		if req.Think != nil {
-			values.ThinkLevel = req.Think.AsString()
+			values.ThinkLevel = req.Think.String()
 		}
 		values.IsThinkSet = req.Think != nil
 
@@ -317,7 +317,7 @@ func (s *Server) GenerateHandler(c *gin.Context) {
 	var thinkingState *thinking.Parser
 	if !useHarmony {
 		openingTag, closingTag := thinking.InferTags(m.Template.Template)
-		if req.Think != nil && req.Think.AsBool() && openingTag != "" && closingTag != "" {
+		if req.Think != nil && req.Think.Bool() && openingTag != "" && closingTag != "" {
 			thinkingState = &thinking.Parser{
 				OpeningTag: openingTag,
 				ClosingTag: closingTag,
@@ -1547,7 +1547,7 @@ func (s *Server) ChatHandler(c *gin.Context) {
 	if len(req.Tools) > 0 {
 		caps = append(caps, model.CapabilityTools)
 	}
-	if req.Think != nil && req.Think.AsBool() {
+	if req.Think != nil && req.Think.Bool() {
 		caps = append(caps, model.CapabilityThinking)
 	}
 
@@ -1601,7 +1601,7 @@ func (s *Server) ChatHandler(c *gin.Context) {
 
 	// Validate Think value: string values currently only allowed for gptoss models
 	if req.Think != nil && req.Think.IsString() && !useHarmony {
-		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("think value %q is not supported for this model", req.Think.AsString())})
+		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("think value %q is not supported for this model", req.Think.String())})
 		return
 	}
 
@@ -1620,7 +1620,7 @@ func (s *Server) ChatHandler(c *gin.Context) {
 
 	var thinkingState *thinking.Parser
 	openingTag, closingTag := thinking.InferTags(m.Template.Template)
-	if req.Think != nil && req.Think.AsBool() && openingTag != "" && closingTag != "" {
+	if req.Think != nil && req.Think.Bool() && openingTag != "" && closingTag != "" {
 		thinkingState = &thinking.Parser{
 			OpeningTag: openingTag,
 			ClosingTag: closingTag,