parsers/renderers: use think from user for nemotron (#13492)

model/parsers/nemotron3nano.go

@@ -24,19 +24,18 @@ const (
 )
 
 type Nemotron3NanoParser struct {
-	state       Nemotron3NanoParserState
-	buffer      strings.Builder
-	tools       []api.Tool
-	HasThinking bool
+	state  Nemotron3NanoParserState
+	buffer strings.Builder
+	tools  []api.Tool
 }
 
 func (p *Nemotron3NanoParser) HasToolSupport() bool     { return true }
-func (p *Nemotron3NanoParser) HasThinkingSupport() bool { return p.HasThinking }
+func (p *Nemotron3NanoParser) HasThinkingSupport() bool { return true }
 
 func (p *Nemotron3NanoParser) Init(tools []api.Tool, lastMessage *api.Message, thinkValue *api.ThinkValue) []api.Tool {
 	p.tools = tools
 
-	// Check both model capability AND request preference
+	// thinking is enabled if user requests it
 	thinkingEnabled := thinkValue != nil && thinkValue.Bool()
 
 	prefill := lastMessage != nil && lastMessage.Role == "assistant"

model/parsers/nemotron3nano_test.go

@@ -203,7 +203,7 @@ func TestNemotron3NanoParser(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			p := &Nemotron3NanoParser{HasThinking: tt.thinkValue != nil && tt.thinkValue.Bool()}
+			p := &Nemotron3NanoParser{}
 			p.Init(nil, nil, tt.thinkValue)
 
 			content, thinking, calls, err := p.Add(tt.input, false)
@@ -441,7 +441,7 @@ func TestNemotron3NanoParser_Streaming(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			p := &Nemotron3NanoParser{HasThinking: tt.thinkValue != nil && tt.thinkValue.Bool()}
+			p := &Nemotron3NanoParser{}
 			p.Init(nil, nil, tt.thinkValue)
 
 			var allContent string
@@ -488,24 +488,15 @@ func TestNemotron3NanoParser_HasToolSupport(t *testing.T) {
 }
 
 func TestNemotron3NanoParser_HasThinkingSupport(t *testing.T) {
-	t.Run("with thinking enabled", func(t *testing.T) {
-		p := &Nemotron3NanoParser{HasThinking: true}
-		if !p.HasThinkingSupport() {
-			t.Error("expected HasThinkingSupport to return true")
-		}
-	})
-
-	t.Run("with thinking disabled", func(t *testing.T) {
-		p := &Nemotron3NanoParser{HasThinking: false}
-		if p.HasThinkingSupport() {
-			t.Error("expected HasThinkingSupport to return false")
-		}
-	})
+	p := &Nemotron3NanoParser{}
+	if !p.HasThinkingSupport() {
+		t.Error("expected HasThinkingSupport to return true")
+	}
 }
 
 func TestNemotron3NanoParser_Init(t *testing.T) {
 	t.Run("starts in thinking state when enabled", func(t *testing.T) {
-		p := &Nemotron3NanoParser{HasThinking: true}
+		p := &Nemotron3NanoParser{}
 		p.Init(nil, nil, &api.ThinkValue{Value: true})
 		if p.state != Nemotron3NanoCollectingThinking {
 			t.Errorf("expected state Nemotron3NanoCollectingThinking, got %v", p.state)
@@ -513,7 +504,7 @@ func TestNemotron3NanoParser_Init(t *testing.T) {
 	})
 
 	t.Run("starts in content state when thinking disabled", func(t *testing.T) {
-		p := &Nemotron3NanoParser{HasThinking: true}
+		p := &Nemotron3NanoParser{}
 		p.Init(nil, nil, &api.ThinkValue{Value: false})
 		if p.state != Nemotron3NanoCollectingContent {
 			t.Errorf("expected state Nemotron3NanoCollectingContent, got %v", p.state)
@@ -521,7 +512,7 @@ func TestNemotron3NanoParser_Init(t *testing.T) {
 	})
 
 	t.Run("starts in content state when nil thinkValue", func(t *testing.T) {
-		p := &Nemotron3NanoParser{HasThinking: true}
+		p := &Nemotron3NanoParser{}
 		p.Init(nil, nil, nil)
 		if p.state != Nemotron3NanoCollectingContent {
 			t.Errorf("expected state Nemotron3NanoCollectingContent, got %v", p.state)
@@ -529,7 +520,7 @@ func TestNemotron3NanoParser_Init(t *testing.T) {
 	})
 
 	t.Run("starts in content state with assistant prefill", func(t *testing.T) {
-		p := &Nemotron3NanoParser{HasThinking: true}
+		p := &Nemotron3NanoParser{}
 		prefill := &api.Message{Role: "assistant", Content: "Starting..."}
 		p.Init(nil, prefill, &api.ThinkValue{Value: true})
 		if p.state != Nemotron3NanoCollectingContent {

model/parsers/parsers.go

@@ -63,9 +63,7 @@ func ParserForName(name string) Parser {
 	case "olmo3-think":
 		return &Olmo3ThinkParser{}
 	case "nemotron-3-nano":
-		return &Nemotron3NanoParser{HasThinking: false}
-	case "nemotron-3-nano-thinking":
-		return &Nemotron3NanoParser{HasThinking: true}
+		return &Nemotron3NanoParser{}
 	default:
 		return nil
 	}

model/renderers/nemotron3nano.go

@@ -8,15 +8,13 @@ import (
 	"github.com/ollama/ollama/api"
 )
 
-type Nemotron3NanoRenderer struct {
-	IsThinking bool
-}
+type Nemotron3NanoRenderer struct{}
 
 func (r *Nemotron3NanoRenderer) Render(messages []api.Message, tools []api.Tool, thinkValue *api.ThinkValue) (string, error) {
 	var sb strings.Builder
 
-	// thinking is enabled: model must support it AND user must request it
-	enableThinking := r.IsThinking && (thinkValue != nil && thinkValue.Bool())
+	// thinking is enabled if user requests it
+	enableThinking := thinkValue != nil && thinkValue.Bool()
 
 	// Extract system message if present
 	var systemMessage string

model/renderers/nemotron3nano_test.go

@@ -14,7 +14,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 		msgs       []api.Message
 		tools      []api.Tool
 		thinkValue *api.ThinkValue
-		isThinking bool
 		expected   string
 	}{
 		{
@@ -22,7 +21,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 			msgs: []api.Message{
 				{Role: "user", Content: "Hello!"},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nHello!<|im_end|>\n" +
@@ -33,7 +31,7 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 			msgs: []api.Message{
 				{Role: "user", Content: "Hello!"},
 			},
-			isThinking: false,
+			thinkValue: nil,
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nHello!<|im_end|>\n" +
 				"<|im_start|>assistant\n<think></think>",
@@ -44,7 +42,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 				{Role: "system", Content: "You are a helpful assistant."},
 				{Role: "user", Content: "Hello!"},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\nYou are a helpful assistant.<|im_end|>\n" +
 				"<|im_start|>user\nHello!<|im_end|>\n" +
@@ -57,7 +54,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 				{Role: "assistant", Content: "Hello! How can I help?"},
 				{Role: "user", Content: "Tell me a joke"},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nHi<|im_end|>\n" +
@@ -86,7 +82,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -141,7 +136,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -198,7 +192,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -228,7 +221,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 				{Role: "assistant", Content: "Hello!", Thinking: "Let me think about this..."},
 				{Role: "user", Content: "How are you?"},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nHi<|im_end|>\n" +
@@ -274,7 +266,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -299,12 +290,11 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 				"<|im_start|>assistant\n<think>\n",
 		},
 		{
-			name: "thinking disabled even when model supports it",
+			name: "thinking disabled when user doesn't request it",
 			msgs: []api.Message{
 				{Role: "user", Content: "Hello!"},
 			},
-			isThinking: true, // model supports thinking
-			thinkValue: nil,  // but user didn't request it
+			thinkValue: nil,
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nHello!<|im_end|>\n" +
 				"<|im_start|>assistant\n<think></think>",
@@ -351,7 +341,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -390,7 +379,7 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 		{
 			name:       "empty messages list",
 			msgs:       []api.Message{},
-			isThinking: false,
+			thinkValue: nil,
 			expected:   "<|im_start|>system\n<|im_end|>\n<|im_start|>assistant\n<think></think>",
 		},
 		{
@@ -417,7 +406,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -446,7 +434,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 				{Role: "assistant", Thinking: "Deep thoughts here...", Content: ""},
 				{Role: "user", Content: "What did you think?"},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nThink about this<|im_end|>\n" +
@@ -483,7 +470,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -512,7 +498,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 				{Role: "assistant", Content: "To call a tool, use <tool_call> tags with <function=name> inside."},
 				{Role: "user", Content: "Thanks!"},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n<|im_end|>\n" +
 				"<|im_start|>user\nHow do I format a tool call?<|im_end|>\n" +
@@ -546,7 +531,6 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 					},
 				},
 			},
-			isThinking: true,
 			thinkValue: &api.ThinkValue{Value: true},
 			expected: "<|im_start|>system\n" +
 				"# Tools\n\nYou have access to the following functions:\n\n<tools>\n" +
@@ -572,7 +556,7 @@ func TestNemotron3NanoRenderer(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			renderer := &Nemotron3NanoRenderer{IsThinking: tt.isThinking}
+			renderer := &Nemotron3NanoRenderer{}
 			rendered, err := renderer.Render(tt.msgs, tt.tools, tt.thinkValue)
 			if err != nil {
 				t.Fatal(err)

model/renderers/renderer.go

@@ -77,11 +77,7 @@ func rendererForName(name string) Renderer {
 		renderer := &Olmo3ThinkRenderer{Variant: Olmo3Think32B}
 		return renderer
 	case "nemotron-3-nano":
-		renderer := &Nemotron3NanoRenderer{IsThinking: false}
-		return renderer
-	case "nemotron-3-nano-thinking":
-		renderer := &Nemotron3NanoRenderer{IsThinking: true}
-		return renderer
+		return &Nemotron3NanoRenderer{}
 	default:
 		return nil
 	}