feat: initial mlx 4bit quant, converted from LetheanNetwork/lemmy bf16

.gitattributes

@@ -33,3 +33,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+tokenizer.json filter=lfs diff=lfs merge=lfs -text

README.md

@@ -0,0 +1,32 @@
+---
+library_name: mlx
+license: apache-2.0
+license_link: https://ai.google.dev/gemma/docs/gemma_4_license
+pipeline_tag: image-text-to-text
+base_model:
+  - LetheanNetwork/lemmy
+base_model_relation: quantized
+tags:
+  - gemma4
+  - mlx
+  - apple-silicon
+  - 4bit
+  - moe
+  - mixture-of-experts
+  - on-device
+  - conversational
+---
+
+# LetheanNetwork/lemmy-mlx
+
+Gemma 4 26B A4B MoE in MLX format, 4-bit quantized, converted from
+[LetheanNetwork/lemmy](https://huggingface.co/LetheanNetwork/lemmy)'s bf16
+safetensors via `mlx_lm.convert`. Unmodified Google weights hosted
+in the Lethean namespace so downstream tools don't have to depend
+on external mlx-community mirrors.
+
+For the LEK-merged sibling see [`lthn/lemmy`](https://huggingface.co/lthn/lemmy).
+
+## License
+
+Apache 2.0, subject to the [Gemma Terms of Use](https://ai.google.dev/gemma/docs/gemma_4_license).

chat_template.jinja

@@ -0,0 +1,266 @@
+{%- macro format_parameters(properties, required) -%}
+    {%- set standard_keys = ['description', 'type', 'properties', 'required', 'nullable'] -%}
+    {%- set ns = namespace(found_first=false) -%}
+    {%- for key, value in properties | dictsort -%}
+        {%- set add_comma = false -%}
+        {%- if key not in standard_keys -%}
+            {%- if ns.found_first %},{% endif -%}
+            {%- set ns.found_first = true -%}
+            {{ key }}:{
+            {%- if value['description'] -%}
+                description:<|"|>{{ value['description'] }}<|"|>
+                {%- set add_comma = true -%}
+            {%- endif -%}
+            {%- if value['nullable'] %}
+                {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                nullable:true
+            {%- endif -%}
+            {%- if value['type'] | upper == 'STRING' -%}
+                {%- if value['enum'] -%}
+                    {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+                    enum:{{ format_argument(value['enum']) }}
+                {%- endif -%}
+            {%- elif value['type'] | upper == 'OBJECT' -%}
+                ,properties:{
+                {%- if value['properties'] is defined and value['properties'] is mapping -%}
+                    {{- format_parameters(value['properties'], value['required'] | default([])) -}}
+                {%- elif value is mapping -%}
+                    {{- format_parameters(value, value['required'] | default([])) -}}
+                {%- endif -%}
+                }
+                {%- if value['required'] -%}
+                    ,required:[
+                    {%- for item in value['required'] | default([]) -%}
+                        <|"|>{{- item -}}<|"|>
+                        {%- if not loop.last %},{% endif -%}
+                    {%- endfor -%}
+                    ]
+                {%- endif -%}
+            {%- elif value['type'] | upper == 'ARRAY' -%}
+                {%- if value['items'] is mapping and value['items'] -%}
+                    ,items:{
+                    {%- set ns_items = namespace(found_first=false) -%}
+                    {%- for item_key, item_value in value['items'] | dictsort -%}
+                        {%- if item_value is not none -%}
+                            {%- if ns_items.found_first %},{% endif -%}
+                            {%- set ns_items.found_first = true -%}
+                            {%- if item_key == 'properties' -%}
+                                properties:{
+                                {%- if item_value is mapping -%}
+                                    {{- format_parameters(item_value, value['items']['required'] | default([])) -}}
+                                {%- endif -%}
+                                }
+                            {%- elif item_key == 'required' -%}
+                                required:[
+                                {%- for req_item in item_value -%}
+                                    <|"|>{{- req_item -}}<|"|>
+                                    {%- if not loop.last %},{% endif -%}
+                                {%- endfor -%}
+                                ]
+                            {%- elif item_key == 'type' -%}
+                                {%- if item_value is string -%}
+                                    type:{{ format_argument(item_value | upper) }}
+                                {%- else -%}
+                                    type:{{ format_argument(item_value | map('upper') | list) }}
+                                {%- endif -%}
+                            {%- else -%}
+                                {{ item_key }}:{{ format_argument(item_value) }}
+                            {%- endif -%}
+                        {%- endif -%}
+                    {%- endfor -%}
+                    }
+                {%- endif -%}
+            {%- endif -%}
+            {%- if add_comma %},{%- else -%} {%- set add_comma = true -%} {% endif -%}
+            type:<|"|>{{ value['type'] | upper }}<|"|>}
+        {%- endif -%}
+    {%- endfor -%}
+{%- endmacro -%}
+{%- macro format_function_declaration(tool_data) -%}
+    declaration:{{- tool_data['function']['name'] -}}{description:<|"|>{{- tool_data['function']['description'] -}}<|"|>
+    {%- set params = tool_data['function']['parameters'] -%}
+    {%- if params -%}
+        ,parameters:{
+        {%- if params['properties'] -%}
+            properties:{ {{- format_parameters(params['properties'], params['required']) -}} },
+        {%- endif -%}
+        {%- if params['required'] -%}
+            required:[
+            {%- for item in params['required'] -%}
+                <|"|>{{- item -}}<|"|>
+                {{- ',' if not loop.last -}}
+            {%- endfor -%}
+            ],
+        {%- endif -%}
+        {%- if params['type'] -%}
+            type:<|"|>{{- params['type'] | upper -}}<|"|>}
+        {%- endif -%}
+    {%- endif -%}
+    {%- if 'response' in tool_data['function'] -%}
+        {%- set response_declaration = tool_data['function']['response'] -%}
+        ,response:{
+        {%- if response_declaration['description'] -%}
+            description:<|"|>{{- response_declaration['description'] -}}<|"|>,
+        {%- endif -%}
+        {%- if response_declaration['type'] | upper == 'OBJECT' -%}
+            type:<|"|>{{- response_declaration['type'] | upper -}}<|"|>}
+        {%- endif -%}
+    {%- endif -%}
+    }
+{%- endmacro -%}
+{%- macro format_argument(argument, escape_keys=True) -%}
+    {%- if argument is string -%}
+        {{- '<|"|>' + argument + '<|"|>' -}}
+    {%- elif argument is boolean -%}
+        {{- 'true' if argument else 'false' -}}
+    {%- elif argument is mapping -%}
+        {{- '{' -}}
+        {%- set ns = namespace(found_first=false) -%}
+        {%- for key, value in argument | dictsort -%}
+            {%- if ns.found_first %},{% endif -%}
+            {%- set ns.found_first = true -%}
+            {%- if escape_keys -%}
+                {{- '<|"|>' + key + '<|"|>' -}}
+            {%- else -%}
+                {{- key -}}
+            {%- endif -%}
+            :{{- format_argument(value, escape_keys=escape_keys) -}}
+        {%- endfor -%}
+        {{- '}' -}}
+    {%- elif argument is sequence -%}
+        {{- '[' -}}
+        {%- for item in argument -%}
+            {{- format_argument(item, escape_keys=escape_keys) -}}
+            {%- if not loop.last %},{% endif -%}
+        {%- endfor -%}
+        {{- ']' -}}
+    {%- else -%}
+        {{- argument -}}
+    {%- endif -%}
+{%- endmacro -%}
+{%- macro strip_thinking(text) -%}
+    {%- set ns = namespace(result='') -%}
+    {%- for part in text.split('<channel|>') -%}
+        {%- if '<|channel>' in part -%}
+            {%- set ns.result = ns.result + part.split('<|channel>')[0] -%}
+        {%- else -%}
+            {%- set ns.result = ns.result + part -%}
+        {%- endif -%}
+    {%- endfor -%}
+    {{- ns.result | trim -}}
+{%- endmacro -%}
+
+{%- set ns = namespace(prev_message_type=None) -%}
+{%- set loop_messages = messages -%}
+{{ bos_token }}
+{#- Handle System/Tool Definitions Block -#}
+{%- if (enable_thinking is defined and enable_thinking) or tools or messages[0]['role'] in ['system', 'developer'] -%}
+    {{- '<|turn>system\n' -}}
+
+    {#- Inject Thinking token at the very top of the FIRST system turn -#}
+    {%- if enable_thinking is defined and enable_thinking -%}
+        {{- '<|think|>' -}}
+        {%- set ns.prev_message_type = 'think' -%}
+    {%- endif -%}
+
+    {%- if messages[0]['role'] in ['system', 'developer'] -%}
+        {{- messages[0]['content'] | trim -}}
+        {%- set loop_messages = messages[1:] -%}
+    {%- endif -%}
+
+    {%- if tools -%}
+        {%- for tool in tools %}
+            {{- '<|tool>' -}}
+            {{- format_function_declaration(tool) | trim -}}
+            {{- '<tool|>' -}}
+        {%- endfor %}
+        {%- set ns.prev_message_type = 'tool' -%}
+    {%- endif -%}
+
+    {{- '<turn|>\n' -}}
+{%- endif %}
+
+{#- Loop through messages -#}
+{%- for message in loop_messages -%}
+    {%- set ns.prev_message_type = None -%}
+    {%- set role = 'model' if message['role'] == 'assistant' else message['role'] -%}
+        {{- '<|turn>' + role + '\n' }}
+
+            {%- if message['tool_calls'] -%}
+                {%- for tool_call in message['tool_calls'] -%}
+                    {%- set function = tool_call['function'] -%}
+                    {{- '<|tool_call>call:' + function['name'] + '{' -}}
+                    {%- if function['arguments'] is mapping -%}
+                        {%- set ns_args = namespace(found_first=false) -%}
+                        {%- for key, value in function['arguments'] | dictsort -%}
+                            {%- if ns_args.found_first %},{% endif -%}
+                            {%- set ns_args.found_first = true -%}
+                            {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
+                        {%- endfor -%}
+                    {%- elif function['arguments'] is string -%}
+                        {{- function['arguments'] -}}
+                    {%- endif -%}
+                    {{- '}<tool_call|>' -}}
+                {%- endfor -%}
+                {%- set ns.prev_message_type = 'tool_call' -%}
+            {%- endif -%}
+
+            {%- if message['tool_responses'] -%}
+                {#- Tool Response handling -#}
+                {%- for tool_response in message['tool_responses'] -%}
+                    {{- '<|tool_response>' -}}
+                    {%- if tool_response['response'] is mapping -%}
+                        {{- 'response:' + tool_response['name'] | default('unknown') + '{' -}}
+                        {%- for key, value in tool_response['response'] | dictsort -%}
+                            {{- key -}}:{{- format_argument(value, escape_keys=False) -}}
+                            {%- if not loop.last %},{% endif -%}
+                        {%- endfor -%}
+                        {{- '}' -}}
+                    {%- else -%}
+                        {{- 'response:' + tool_response['name'] | default('unknown') + '{value:' + format_argument(tool_response['response'], escape_keys=False) + '}' -}}
+                    {%- endif -%}
+                    {{- '<tool_response|>' -}}
+                {%- endfor -%}
+                {%- set ns.prev_message_type = 'tool_response' -%}
+            {%- endif -%}
+
+            {%- if message['content'] is string -%}
+                {%- if role == 'model' -%}
+                    {{- strip_thinking(message['content']) -}}
+                {%- else -%}
+                    {{- message['content'] | trim -}}
+                {%- endif -%}
+            {%- elif message['content'] is sequence -%}
+                {%- for item in message['content'] -%}
+                    {%- if item['type'] == 'text' -%}
+                        {%- if role == 'model' -%}
+                            {{- strip_thinking(item['text']) -}}
+                        {%- else -%}
+                            {{- item['text'] | trim -}}
+                        {%- endif -%}
+                    {%- elif item['type'] == 'image' -%}
+                        {{- '\n\n<|image|>\n\n' -}}
+                        {%- set ns.prev_message_type = 'image' -%}
+                    {%- elif item['type'] == 'audio' -%}
+                        {{- '<|audio|>' -}}
+                        {%- set ns.prev_message_type = 'audio' -%}
+                    {%- elif item['type'] == 'video' -%}
+                        {{- '\n\n<|video|>\n\n' -}}
+                        {%- set ns.prev_message_type = 'video' -%}
+                    {%- endif -%}
+                {%- endfor -%}
+            {%- endif -%}
+
+        {%- if not (message['tool_responses'] and not message['content']) -%}
+            {{- '<turn|>\n' -}}
+        {%- endif -%}
+{%- endfor -%}
+
+{%- if add_generation_prompt -%}
+    {%- if ns.prev_message_type != 'tool_response' -%}
+        {{- '<|turn>model\n' -}}
+    {%- endif -%}
+    {%- if not enable_thinking | default(false) -%}
+        {{- '<|channel>thought\n<channel|>' -}}
+    {%- endif -%}
+{%- endif -%}

config.json

@@ -0,0 +1,354 @@
+{
+    "architectures": [
+        "Gemma4ForConditionalGeneration"
+    ],
+    "audio_config": null,
+    "audio_token_id": 258881,
+    "boa_token_id": 256000,
+    "boi_token_id": 255999,
+    "dtype": "bfloat16",
+    "eoa_token_id": 258883,
+    "eoa_token_index": 258883,
+    "eoi_token_id": 258882,
+    "eos_token_id": [
+        1,
+        106,
+        50
+    ],
+    "image_token_id": 258880,
+    "initializer_range": 0.02,
+    "model_type": "gemma4",
+    "quantization": {
+        "group_size": 64,
+        "bits": 4,
+        "mode": "affine",
+        "language_model.model.layers.0.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.1.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.2.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.3.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.4.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.5.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.6.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.7.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.8.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.9.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.10.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.11.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.12.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.13.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.14.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.15.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.16.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.17.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.18.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.19.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.20.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.21.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.22.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.23.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.24.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.25.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.26.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.27.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.28.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.29.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        }
+    },
+    "quantization_config": {
+        "group_size": 64,
+        "bits": 4,
+        "mode": "affine",
+        "language_model.model.layers.0.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.1.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.2.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.3.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.4.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.5.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.6.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.7.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.8.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.9.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.10.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.11.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.12.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.13.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.14.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.15.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.16.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.17.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.18.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.19.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.20.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.21.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.22.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.23.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.24.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.25.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.26.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.27.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.28.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        },
+        "language_model.model.layers.29.router.proj": {
+            "group_size": 64,
+            "bits": 8
+        }
+    },
+    "text_config": {
+        "attention_bias": false,
+        "attention_dropout": 0.0,
+        "attention_k_eq_v": true,
+        "bos_token_id": 2,
+        "dtype": "bfloat16",
+        "enable_moe_block": true,
+        "eos_token_id": 1,
+        "final_logit_softcapping": 30.0,
+        "global_head_dim": 512,
+        "head_dim": 256,
+        "hidden_activation": "gelu_pytorch_tanh",
+        "hidden_size": 2816,
+        "hidden_size_per_layer_input": 0,
+        "initializer_range": 0.02,
+        "intermediate_size": 2112,
+        "layer_types": [
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "full_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "full_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "full_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "full_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "sliding_attention",
+            "full_attention"
+        ],
+        "max_position_embeddings": 262144,
+        "model_type": "gemma4_text",
+        "moe_intermediate_size": 704,
+        "num_attention_heads": 16,
+        "num_experts": 128,
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