model: ministral w/ llama4 scaling (#13292)

This change:

* fixes rope scaling in the mistral converter
* updates ministral to include llama4 scaling
* includes a new ministral parser for parsing reasoning and tool calling

---------
Co-authored-by: jmorganca <jmorganca@gmail.com>

.golangci.yaml

@@ -11,7 +11,6 @@ linters:
     - errorlint
     - exptostd
     - gocheckcompilerdirectives
-    - gocritic
     - govet
     - ineffassign
     - intrange

cmd/cmd.go

@@ -1430,7 +1430,7 @@ func chat(cmd *cobra.Command, opts runOptions) (*api.Message, error) {
 		latest.Summary()
 	}
 
-	return &api.Message{Role: role, Content: fullResponse.String()}, nil
+	return &api.Message{Role: role, Thinking: thinkingContent.String(), Content: fullResponse.String()}, nil
 }
 
 func generate(cmd *cobra.Command, opts runOptions) error {

convert/convert_mistral.go

@@ -29,6 +29,15 @@ type mistral3Model struct {
 		SlidingWindow         *uint32 `json:"sliding_window"`
 		HiddenAct             string  `json:"hidden_act"`
 		VocabSize             uint32  `json:"vocab_size"`
+		RopeParameters        struct {
+			BetaFast                  float32 `json:"beta_fast"`
+			BetaSlow                  float32 `json:"beta_slow"`
+			Factor                    float32 `json:"factor"`
+			ScalingBeta               float32 `json:"llama_4_scaling_beta"`
+			OrigMaxPositionEmbeddings uint32  `json:"original_max_position_embeddings"`
+			RopeType                  string  `json:"rope_type"`
+			RopeTheta                 float32 `json:"rope_theta"`
+		} `json:"rope_parameters"`
 	} `json:"text_config"`
 	VisionModel struct {
 		NumAttentionHeads uint32  `json:"num_attention_heads"`
@@ -61,8 +70,13 @@ func (p *mistral3Model) KV(t *Tokenizer) ggml.KV {
 	kv["mistral3.attention.layer_norm_rms_epsilon"] = p.TextModel.RMSNormEPS
 	kv["mistral3.attention.key_length"] = p.TextModel.HeadDim
 	kv["mistral3.attention.value_length"] = p.TextModel.HeadDim
-	kv["mistral3.rope.dimension_count"] = p.TextModel.HiddenSize / p.TextModel.NumHiddenLayers
-	kv["mistral3.rope.freq_base"] = p.TextModel.RopeTheta
+	kv["mistral3.rope.dimension_count"] = cmp.Or(p.TextModel.HeadDim, p.TextModel.HiddenSize/p.TextModel.NumAttentionHeads)
+	kv["mistral3.rope.freq_base"] = cmp.Or(p.TextModel.RopeTheta, p.TextModel.RopeParameters.RopeTheta)
+
+	if p.TextModel.RopeParameters.OrigMaxPositionEmbeddings > 0 {
+		kv["mistral3.rope.scaling.original_context_length"] = p.TextModel.RopeParameters.OrigMaxPositionEmbeddings
+		kv["mistral3.rope.scaling_beta"] = p.TextModel.RopeParameters.ScalingBeta
+	}
 
 	// Vision configuration
 	kv["mistral3.vision.block_count"] = p.VisionModel.NumHiddenLayers

model/models/mistral3/model.go

@@ -159,8 +159,9 @@ func (m *Model) PostTokenize(inputs []*input.Input) ([]*input.Input, error) {
 
 func (m *Model) Forward(ctx ml.Context, batch input.Batch) (ml.Tensor, error) {
 	positions := ctx.Input().FromInts(batch.Positions, len(batch.Positions))
+	positionsScale := m.getScale(ctx, batch.Positions)
 
-	return m.TextModel.Forward(ctx, batch.Inputs, positions, batch.Outputs, batch, m.Cache), nil
+	return m.TextModel.Forward(ctx, batch.Inputs, positions, positionsScale, batch.Outputs, batch, m.Cache), nil
 }
 
 func init() {

model/models/mistral3/model_text.go

@@ -16,6 +16,8 @@ type TextOptions struct {
 	hiddenSize, numHeads, numKVHeads int
 	headDim, ropeDim                 int
 	eps, ropeBase, ropeScale         float32
+	ropeOrigPosEmbeddings            int
+	ropeScalingBeta                  float32
 }
 
 type TextModel struct {
@@ -34,7 +36,7 @@ type SelfAttention struct {
 	Output *nn.Linear `gguf:"attn_output"`
 }
 
-func (sa *SelfAttention) Forward(ctx ml.Context, hiddenState, positionIDs ml.Tensor, cache kvcache.Cache, opts *TextOptions) ml.Tensor {
+func (sa *SelfAttention) Forward(ctx ml.Context, hiddenState, positionIDs, positionsScale ml.Tensor, cache kvcache.Cache, opts *TextOptions) ml.Tensor {
 	batchSize := hiddenState.Dim(1)
 	headDim := cmp.Or(opts.headDim, opts.hiddenSize/opts.numHeads)
 
@@ -49,6 +51,10 @@ func (sa *SelfAttention) Forward(ctx ml.Context, hiddenState, positionIDs ml.Ten
 	v := sa.Value.Forward(ctx, hiddenState)
 	v = v.Reshape(ctx, headDim, opts.numKVHeads, batchSize)
 
+	if opts.ropeOrigPosEmbeddings > 0 {
+		q = q.Mul(ctx, positionsScale)
+	}
+
 	kqv := nn.Attention(ctx, q, k, v, 1.0/math.Sqrt(float64(headDim)), cache)
 	kqv = kqv.Reshape(ctx, headDim*opts.numHeads, batchSize)
 	return sa.Output.Forward(ctx, kqv)
@@ -76,11 +82,11 @@ type Layer struct {
 	MLP           *MLP
 }
 
-func (l *Layer) Forward(ctx ml.Context, hiddenState, positionIDs, outputs ml.Tensor, cache kvcache.Cache, opts *TextOptions) ml.Tensor {
+func (l *Layer) Forward(ctx ml.Context, hiddenState, positionIDs, positionsScale, outputs ml.Tensor, cache kvcache.Cache, opts *TextOptions) ml.Tensor {
 	residual := hiddenState
 
 	hiddenState = l.AttentionNorm.Forward(ctx, hiddenState, opts.eps)
-	hiddenState = l.SelfAttention.Forward(ctx, hiddenState, positionIDs, cache, opts)
+	hiddenState = l.SelfAttention.Forward(ctx, hiddenState, positionIDs, positionsScale, cache, opts)
 
 	// In the final layer (outputs != nil), optimize by pruning to just the token positions
 	// we need logits for.
@@ -97,7 +103,7 @@ func (l *Layer) Forward(ctx ml.Context, hiddenState, positionIDs, outputs ml.Ten
 	return hiddenState.Add(ctx, residual)
 }
 
-func (m *TextModel) Forward(ctx ml.Context, inputs, positions, outputs ml.Tensor, batch input.Batch, cache kvcache.Cache) ml.Tensor {
+func (m *TextModel) Forward(ctx ml.Context, inputs, positions, positionsScale, outputs ml.Tensor, batch input.Batch, cache kvcache.Cache) ml.Tensor {
 	hiddenState := m.TokenEmbedding.Forward(ctx, inputs).Duplicate(ctx)
 
 	// image embeddings
@@ -114,25 +120,36 @@ func (m *TextModel) Forward(ctx ml.Context, inputs, positions, outputs ml.Tensor
 			lastLayerOutputs = outputs
 		}
 
-		hiddenState = layer.Forward(ctx, hiddenState, positions, lastLayerOutputs, cache, m.TextOptions)
+		hiddenState = layer.Forward(ctx, hiddenState, positions, positionsScale, lastLayerOutputs, cache, m.TextOptions)
 	}
 
 	hiddenState = m.OutputNorm.Forward(ctx, hiddenState, m.eps)
 	return m.Output.Forward(ctx, hiddenState)
 }
 
+func (m *TextModel) getScale(ctx ml.Context, positions []int32) ml.Tensor {
+	posScale := make([]float32, len(positions))
+	for n, pos := range positions {
+		interval := math.Floor(float64(pos) / float64(m.ropeOrigPosEmbeddings))
+		posScale[n] = float32(1.0 + float64(m.ropeScalingBeta)*math.Log(1.0+interval))
+	}
+	return ctx.Input().FromFloats(posScale, 1, 1, len(posScale))
+}
+
 func newTextModel(c fs.Config) *TextModel {
 	return &TextModel{
 		Layers: make([]Layer, c.Uint("block_count")),
 		TextOptions: &TextOptions{
-			hiddenSize: int(c.Uint("embedding_length")),
-			numHeads:   int(c.Uint("attention.head_count")),
-			numKVHeads: int(c.Uint("attention.head_count_kv")),
-			headDim:    int(c.Uint("attention.key_length")),
-			ropeDim:    int(c.Uint("rope.dimension_count")),
-			eps:        c.Float("attention.layer_norm_rms_epsilon"),
-			ropeBase:   c.Float("rope.freq_base"),
-			ropeScale:  c.Float("rope.scaling.factor", 1),
+			hiddenSize:            int(c.Uint("embedding_length")),
+			numHeads:              int(c.Uint("attention.head_count")),
+			numKVHeads:            int(c.Uint("attention.head_count_kv")),
+			headDim:               int(c.Uint("attention.key_length")),
+			ropeDim:               int(c.Uint("rope.dimension_count")),
+			eps:                   c.Float("attention.layer_norm_rms_epsilon"),
+			ropeBase:              c.Float("rope.freq_base"),
+			ropeScale:             c.Float("rope.scaling.factor", 1),
+			ropeOrigPosEmbeddings: int(c.Uint("rope.scaling.original_context_length")),
+			ropeScalingBeta:       c.Float("rope.scaling_beta"),
 		},
 	}
 }

model/parsers/ministral.go

+package parsers
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/ollama/ollama/api"
+)
+
+type ministralParserState int
+
+const (
+	ministralCollectingContent = iota
+	ministralCollectingThinkingContent
+	ministralCollectingToolName
+	ministralCollectingToolArgs
+)
+
+type MinistralParser struct {
+	state              ministralParserState
+	buffer             strings.Builder
+	tools              []api.Tool
+	hasThinkingSupport bool
+	currentTool        *api.Tool
+}
+
+func (p *MinistralParser) HasToolSupport() bool {
+	return true
+}
+
+func (p *MinistralParser) HasThinkingSupport() bool {
+	return p.hasThinkingSupport
+}
+
+func (p *MinistralParser) setInitialState(lastMessage *api.Message) {
+	prefill := lastMessage != nil && lastMessage.Role == "assistant"
+	if !p.HasThinkingSupport() {
+		p.state = ministralCollectingContent
+		return
+	}
+
+	if prefill && lastMessage.Content != "" {
+		p.state = ministralCollectingContent
+		return
+	}
+
+	p.state = ministralCollectingThinkingContent
+}
+
+func (p *MinistralParser) Init(tools []api.Tool, lastMessage *api.Message, thinkValue *api.ThinkValue) []api.Tool {
+	p.tools = tools
+	p.setInitialState(lastMessage)
+	return tools
+}
+
+func toolByName(tools []api.Tool, n string) (*api.Tool, error) {
+	for i := range tools {
+		if tools[i].Function.Name == n {
+			return &tools[i], nil
+		}
+	}
+	return nil, fmt.Errorf("tool '%s' not found", n)
+}
+
+func (p *MinistralParser) Add(s string, done bool) (content string, thinking string, calls []api.ToolCall, err error) {
+	p.buffer.WriteString(s)
+
+	switch p.state {
+	case ministralCollectingContent:
+		if strings.Contains(p.buffer.String(), "[TOOL_CALLS]") {
+			before, _ := splitAtTag(&p.buffer, "[TOOL_CALLS]", false)
+			if before != "" {
+				return before, "", calls, nil
+			}
+			p.state = ministralCollectingToolName
+		} else if strings.Contains(p.buffer.String(), "[THINK]") {
+			p.state = ministralCollectingThinkingContent
+			return "", "", calls, nil
+		} else {
+			p.buffer.Reset()
+			return s, "", calls, nil
+		}
+	case ministralCollectingThinkingContent:
+		if strings.Contains(p.buffer.String(), "[/THINK]") {
+			thinkingContent, after := splitAtTag(&p.buffer, "[/THINK]", true)
+			p.state = ministralCollectingContent
+			if after != "" {
+				p.buffer.Reset()
+				return after, thinkingContent, calls, nil
+			}
+			return "", thinkingContent, calls, nil
+		} else {
+			p.buffer.Reset()
+			return "", s, calls, nil
+		}
+	case ministralCollectingToolName:
+		if strings.Contains(p.buffer.String(), "[ARGS]") {
+			name, _ := splitAtTag(&p.buffer, "[ARGS]", false)
+
+			t, err := toolByName(p.tools, name)
+			if err != nil {
+				return "", "", calls, err
+			}
+			p.currentTool = t
+			p.state = ministralCollectingToolArgs
+			return "", "", calls, nil
+		}
+		return "", "", calls, nil
+	case ministralCollectingToolArgs:
+		if strings.Contains(p.buffer.String(), "}") {
+			before, _ := splitAtTag(&p.buffer, "}", false)
+			before += "}"
+
+			var data map[string]any
+			if err := json.Unmarshal([]byte(before), &data); err != nil {
+				// todo - throw a better error
+				return "", "", calls, err
+			}
+
+			p.state = ministralCollectingContent
+
+			call := api.ToolCall{
+				Function: api.ToolCallFunction{
+					Name:      p.currentTool.Function.Name,
+					Arguments: api.ToolCallFunctionArguments(data),
+				},
+			}
+			calls = append(calls, call)
+			return "", "", calls, nil
+		}
+		return "", "", calls, nil
+	}
+
+	return p.buffer.String(), thinking, calls, nil
+}

model/parsers/parsers.go

 package parsers
 
 import (
+	"strings"
+	"unicode"
+
 	"github.com/ollama/ollama/api"
 	"github.com/ollama/ollama/harmony"
 )
@@ -38,16 +41,17 @@ func ParserForName(name string) Parser {
 	if parser, ok := registry.constructors[name]; ok {
 		return parser()
 	}
+	var p Parser
+
 	switch name {
 	case "qwen3-coder":
-		parser := &Qwen3CoderParser{}
-		return parser
+		p = &Qwen3CoderParser{}
 	case "qwen3-vl-instruct":
-		parser := &Qwen3VLParser{hasThinkingSupport: false}
-		return parser
+		p = &Qwen3VLParser{hasThinkingSupport: false}
 	case "qwen3-vl-thinking":
-		parser := &Qwen3VLParser{hasThinkingSupport: true}
-		return parser
+		p = &Qwen3VLParser{hasThinkingSupport: true}
+	case "ministral":
+		p = &MinistralParser{hasThinkingSupport: false}
 	case "passthrough":
 		return &PassthroughParser{}
 	case "harmony":
@@ -57,6 +61,7 @@ func ParserForName(name string) Parser {
 	default:
 		return nil
 	}
+	return p
 }
 
 type PassthroughParser struct{}
@@ -76,3 +81,20 @@ func (p *PassthroughParser) HasToolSupport() bool {
 func (p *PassthroughParser) HasThinkingSupport() bool {
 	return false
 }
+
+func splitAtTag(sb *strings.Builder, tag string, trimAfter bool) (string, string) {
+	split := strings.SplitN(sb.String(), tag, 2)
+	if len(split) == 1 {
+		sb.Reset()
+		return split[0], ""
+	}
+	before := split[0]
+	before = strings.TrimRightFunc(before, unicode.IsSpace)
+	after := split[1]
+	if trimAfter {
+		after = strings.TrimLeftFunc(after, unicode.IsSpace)
+	}
+	sb.Reset()
+	sb.WriteString(after)
+	return before, after // return events
+}

model/parsers/parsers_test.go

 package parsers
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/ollama/ollama/api"
@@ -95,3 +96,164 @@ func TestUnknownParserReturnsNil(t *testing.T) {
 		t.Error("expected nil for unknown parser")
 	}
 }
+
+func TestSplitAtTag(t *testing.T) {
+	tests := []struct {
+		name       string
+		input      string
+		tag        string
+		trimAfter  bool
+		wantBefore string
+		wantAfter  string
+		wantSB     string // expected content of strings.Builder after operation
+	}{
+		{
+			name:       "basic split with trimAfter true",
+			input:      "hello <!-- split --> world",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "hello",
+			wantAfter:  "world",
+			wantSB:     "world",
+		},
+		{
+			name:       "basic split with trimAfter false",
+			input:      "hello <!-- split -->   world",
+			tag:        "<!-- split -->",
+			trimAfter:  false,
+			wantBefore: "hello",
+			wantAfter:  "   world",
+			wantSB:     "   world",
+		},
+		{
+			name:       "tag at beginning with trimAfter true",
+			input:      "<!-- split -->world",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "",
+			wantAfter:  "world",
+			wantSB:     "world",
+		},
+		{
+			name:       "tag at beginning with trimAfter false",
+			input:      "<!-- split -->   world",
+			tag:        "<!-- split -->",
+			trimAfter:  false,
+			wantBefore: "",
+			wantAfter:  "   world",
+			wantSB:     "   world",
+		},
+		{
+			name:       "tag at end with trimAfter true",
+			input:      "hello <!-- split -->",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "hello",
+			wantAfter:  "",
+			wantSB:     "",
+		},
+		{
+			name:       "tag at end with trimAfter false",
+			input:      "hello <!-- split -->",
+			tag:        "<!-- split -->",
+			trimAfter:  false,
+			wantBefore: "hello",
+			wantAfter:  "",
+			wantSB:     "",
+		},
+		{
+			name:       "multiple tags splits at first occurrence",
+			input:      "hello <!-- split --> world <!-- split --> end",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "hello",
+			wantAfter:  "world <!-- split --> end",
+			wantSB:     "world <!-- split --> end",
+		},
+		{
+			name:       "tag not present",
+			input:      "hello world",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "hello world",
+			wantAfter:  "",
+			wantSB:     "",
+		},
+		{
+			name:       "empty input",
+			input:      "",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "",
+			wantAfter:  "",
+			wantSB:     "",
+		},
+		{
+			name:       "only whitespace before tag",
+			input:      "   \t\n<!-- split -->world",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "",
+			wantAfter:  "world",
+			wantSB:     "world",
+		},
+		{
+			name:       "only whitespace after tag with trimAfter true",
+			input:      "hello<!-- split -->   \t\n",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "hello",
+			wantAfter:  "",
+			wantSB:     "",
+		},
+		{
+			name:       "only whitespace after tag with trimAfter false",
+			input:      "hello<!-- split -->   \t\n",
+			tag:        "<!-- split -->",
+			trimAfter:  false,
+			wantBefore: "hello",
+			wantAfter:  "   \t\n",
+			wantSB:     "   \t\n",
+		},
+		{
+			name:       "complex whitespace trimming",
+			input:      "  hello \t\n <!-- split --> \n\t world  ",
+			tag:        "<!-- split -->",
+			trimAfter:  true,
+			wantBefore: "  hello",
+			wantAfter:  "world  ",
+			wantSB:     "world  ",
+		},
+		{
+			name:       "tag with special characters",
+			input:      "text <tag attr=\"value\"> more text",
+			tag:        "<tag attr=\"value\">",
+			trimAfter:  true,
+			wantBefore: "text",
+			wantAfter:  "more text",
+			wantSB:     "more text",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			sb := &strings.Builder{}
+			sb.WriteString(tt.input)
+
+			before, after := splitAtTag(sb, tt.tag, tt.trimAfter)
+
+			// Check return values
+			if before != tt.wantBefore {
+				t.Errorf("splitAtTag() before = %q, want %q", before, tt.wantBefore)
+			}
+			if after != tt.wantAfter {
+				t.Errorf("splitAtTag() after = %q, want %q", after, tt.wantAfter)
+			}
+
+			// Check strings.Builder state
+			if sb.String() != tt.wantSB {
+				t.Errorf("strings.Builder after split = %q, want %q", sb.String(), tt.wantSB)
+			}
+		})
+	}
+}

model/parsers/qwen3vl.go

@@ -70,7 +70,6 @@ func (p *Qwen3VLParser) Add(s string, done bool) (content string, thinking strin
 	p.buffer.WriteString(s)
 	events := p.parseEvents()
 
-	var toolCalls []api.ToolCall
 	var contentSb strings.Builder
 	var thinkingSb strings.Builder
 	for _, event := range events {
@@ -81,7 +80,7 @@ func (p *Qwen3VLParser) Add(s string, done bool) (content string, thinking strin
 				slog.Warn("qwen tool call parsing failed", "error", err)
 				return "", "", nil, err
 			}
-			toolCalls = append(toolCalls, toolCall)
+			calls = append(calls, toolCall)
 		case qwenEventThinkingContent:
 			thinkingSb.WriteString(event.content)
 		case qwenEventContent:
@@ -91,7 +90,7 @@ func (p *Qwen3VLParser) Add(s string, done bool) (content string, thinking strin
 		}
 	}
 
-	return contentSb.String(), thinkingSb.String(), toolCalls, nil
+	return contentSb.String(), thinkingSb.String(), calls, nil
 }
 
 func (p *Qwen3VLParser) parseEvents() []qwenEvent {
@@ -113,19 +112,6 @@ func (p *Qwen3VLParser) parseEvents() []qwenEvent {
 	return all
 }
 
-func splitAtTag(p *Qwen3VLParser, tag string, trimAfter bool) (string, string) {
-	split := strings.SplitN(p.buffer.String(), tag, 2)
-	before := split[0]
-	before = strings.TrimRightFunc(before, unicode.IsSpace)
-	after := split[1]
-	if trimAfter {
-		after = strings.TrimLeftFunc(after, unicode.IsSpace)
-	}
-	p.buffer.Reset()
-	p.buffer.WriteString(after)
-	return before, after // return events
-}
-
 func (p *Qwen3VLParser) eatLeadingWhitespaceAndTransitionTo(nextState qwenParserState) ([]qwenEvent, bool) {
 	trimmed := strings.TrimLeftFunc(p.buffer.String(), unicode.IsSpace)
 	p.buffer.Reset()
@@ -144,7 +130,7 @@ func (p *Qwen3VLParser) eat() ([]qwenEvent, bool) {
 	case CollectingContent:
 		if strings.Contains(p.buffer.String(), toolOpenTag) {
 			// events = emitContentBeforeTag(p, events, toolOpenTag)
-			before, _ := splitAtTag(p, toolOpenTag, false)
+			before, _ := splitAtTag(&p.buffer, toolOpenTag, false)
 			if len(before) > 0 {
 				events = append(events, qwenEventContent{content: before})
 			}
@@ -195,7 +181,7 @@ func (p *Qwen3VLParser) eat() ([]qwenEvent, bool) {
 		}
 	case CollectingThinkingContent:
 		if strings.Contains(p.buffer.String(), thinkingCloseTag) {
-			thinking, remaining := splitAtTag(p, thinkingCloseTag, true)
+			thinking, remaining := splitAtTag(&p.buffer, thinkingCloseTag, true)
 			if len(thinking) > 0 {
 				events = append(events, qwenEventThinkingContent{content: thinking})
 			}