tencent

Hy3

Name: Hy3
Author: tencent

298.8B parameters · mixture-of-experts · reasoning · Base · Hy3 family

Mixture-of-experts — what it means for memory & speed → Long context — how it uses memory →

apache-2.0 source matched revision pinned upstream repo changed since import

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Context

Advertised 256k · no independent evidence yet

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Capabilities (as declared by the maintainer): reasoning tool calling

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Quant

Context / KV 8,192 tokens · FP16 set above the quant table

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Technical details

Chat template

{#- ----------‑‑‑ special token variables ‑‑‑---------- -#}
{%- set HYTK = ':opensource' %}
{%- set eos_token = '<｜hy_eos{}｜>'.format(HYTK) %}
{%- set bos_token = '<｜hy_begin_of_sentence{}｜>'.format(HYTK) %}
{%- set pad_token = '<｜hy_pad{}｜>'.format(HYTK) %}
{%- set user_token = '<｜hy_User{}｜>'.format(HYTK) %}
{%- set assistant_token = '<｜hy_Assistant{}｜>'.format(HYTK) %}
{%- set think_begin_token = '<think{}>'.format(HYTK) %}
{%- set think_end_token = '</think{}>'.format(HYTK) %}
{%- set toolcalls_begin_token = '<tool_calls{}>'.format(HYTK) %}
{%- set toolcalls_end_token = '</tool_calls{}>'.format(HYTK) %}
{%- set toolcall_begin_token = '<tool_call{}>'.format(HYTK) %}
{%- set toolcall_end_token = '</tool_call{}>'.format(HYTK) %}
{%- set toolsep_token = '<tool_sep{}>'.format(HYTK) %}
{%- set argkey_begin_token = '<arg_key{}>'.format(HYTK) %}
{%- set argkey_end_token = '</arg_key{}>'.format(HYTK) %}
{%- set argvalue_begin_token = '<arg_value{}>'.format(HYTK) %}
{%- set argvalue_end_token = '</arg_value{}>'.format(HYTK) %}
{%- set toolresponses_begin_token = '<tool_responses{}>'.format(HYTK) %}
{%- set toolresponses_end_token = '</tool_responses{}>'.format(HYTK) %}
{%- set toolresponse_begin_token = '<tool_response{}>'.format(HYTK) %}
{%- set toolresponse_end_token = '</tool_response{}>'.format(HYTK) %}
{%- set reasoning_mode_token = '<｜reasoning_mode{}｜>'.format(HYTK) %}

{#- ----------‑‑‑ hyperparameters variables ‑‑‑---------- -#}
{%- if not add_generation_prompt is defined %}
    {%- set add_generation_prompt = false %}
{%- endif %}
{%- if not preserved_thinking is defined %}
    {%- if not tools %}
        {%- set preserved_thinking = false %}
    {%- else %}
        {%- set preserved_thinking = true %}
    {%- endif %}
{%- endif %}
{%- if not is_training is defined %}
    {%- set is_training = false %}
{%- endif %}

{%- if not reasoning_effort is defined %}
    {%- set reasoning_effort = 'no_think' %}
{%- elif reasoning_effort not in ['high', 'low', 'no_think'] %}
    {%- if reasoning_effort is none %}
        {{- raise_exception('reasoning_effort error : None, should be no_think/low/high') }}
    {%- else %}
        {{- raise_exception('reasoning_effort error : ' + reasoning_effort + ', should be no_think/low/high') }}
    {%- endif %}
{%- endif %}

{%- if fallback_strategy is defined and fallback_strategy == 'reasoning_toolcall_retry' %}
    {%- set reasoning_effort = 'high' %}
    {%- set add_generation_prompt = false %}
{%- endif %}
{%- if not raw_last_assistant is defined %}
    {%- set raw_last_assistant = false %}
{%- endif %}

{%- macro visible_text(content) -%}
    {%- if content is string -%}
        {{- content }}
    {%- elif content is iterable and content is not mapping -%}
        {%- for item in content -%}
            {%- if item is mapping and item.type == 'text' -%}
                {{- item.text }}
            {%- elif item is string -%}
                {{- item }}
            {%- endif -%}
        {%- endfor -%}
    {%- elif content is none -%}
        {{- '' }}
    {%- else -%}
        {{- content }}
    {%- endif -%}
{%- endmacro -%}

{%- set ns = namespace(last_user_index=-1) %}
{%- set sp_ns = namespace(system_prompt='', is_first_sp=true) %}
{%- for message in messages %}
    {%- if message['role'] == 'system' %}
        {%- set sp_ns.system_prompt = sp_ns.system_prompt + visible_text(message['content']) %}
    {%- endif %}
    {%- if message['role'] == 'user' %}
        {%- set ns.last_user_index = loop.index0 %}
    {%- endif %}
{%- endfor %}
{%- if reasoning_effort is defined and reasoning_effort is string and reasoning_effort != '' and not tools %}
    {%- set sp_ns.system_prompt = sp_ns.system_prompt + reasoning_mode_token + 'reasoning_effort:' + reasoning_effort %}
{%- endif %}
{{- bos_token }}
{{- sp_ns.system_prompt }}
{%- if tools %}
    {%- if sp_ns.system_prompt != '' %}
        {{- '\n\n# Tools\n\nYou may call one or more functions to assist with the user query.' }}
    {%- else %}
        {{- '# Tools\n\nYou may call one or more functions to assist with the user query.' }}
    {%- endif %}
    {{- '\n\nYou are provided with function signatures within <tools></tools> XML tags:' }}
    {{- '\n<tools>\n' }}
    {%- for tool in tools %}
        {%- if loop.index0 > 0 %}
            {{- '\n' }}
        {%- endif %}
        {{- tool | tojson }}
    {%- endfor %}
    {{- '\n</tools>\n\n' }}
    {{- 'For function call returns, you should first print ' + toolcalls_begin_token + '\n' }}
    {{- 'For each function call, you should return object like:\n' }}
    {{- toolcall_begin_token + '{function-name}' + toolsep_token + '\n' }}
    {{- argkey_begin_token + '{arg-key-1}' + argkey_end_token + '\n' }}
    {{- argvalue_begin_token + '{arg-value-1}' + argvalue_end_token + '\n' }}
    {{- argkey_begin_token + '{arg-key-2}' + argkey_end_token + '\n' }}
    {{- argvalue_begin_token + '{arg-value-2}' + argvalue_end_token + '\n' }}
    {{- '...\n' }}
    {{- toolcall_end_token + '\n' }}
    {%- if reasoning_effort is defined and reasoning_effort is string and reasoning_effort != '' %}
        {{- 'At the end of function call returns, you should print ' + toolcalls_end_token + reasoning_mode_token + 'reasoning_effort:' + reasoning_effort }}
    {%- else %}
        {{- 'At the end of function call returns, you should print ' + toolcalls_end_token }}
    {%- endif %}
{%- endif %}

{%- set prev_ns = namespace(is_tool=false, is_tool_first=true) %}
{%- set last_ns = namespace(last_is_assistant=false) %}
{%- for message in messages %}
    {%- if message['role'] == 'user' %}
        {%- if prev_ns.is_tool %}
            {{- toolresponses_end_token }}
        {%- endif %}
        {{- user_token + visible_text(message['content']) }}
        {%- set prev_ns.is_tool = false %}
    {%- endif %}
    {%- if message['role'] == 'assistant' %}
        {%- if is_training %}
            {%- if 'reasoning_content' in message and message['reasoning_content'] is string %}
                {%- set rc = message['reasoning_content'] %}
            {%- elif 'reasoning' in message and message['reasoning'] is string %}
                {%- set rc = message['reasoning'] %}
            {%- else %}
                {%- set rc = none %}
            {%- endif %}
            {%- if rc is not none %}
                {%- set content = think_begin_token + rc + think_end_token + visible_text(message['content']) %}
            {%- else %}
                {%- set content = think_begin_token + think_end_token + visible_text(message['content']) %}
            {%- endif %}
        {%- else %}
            {%- if ((preserved_thinking is defined and preserved_thinking) or loop.index0 > ns.last_user_index) %}
                {%- if 'reasoning_content' in message and message['reasoning_content'] is string %}
                    {%- set rc = message['reasoning_content'] %}
                {%- elif 'reasoning' in message and message['reasoning'] is string %}
                    {%- set rc = message['reasoning'] %}
                {%- else %}
                    {%- set rc = none %}
                {%- endif %}
                {%- if rc is not none %}
                    {%- set content = think_begin_token + rc + think_end_token + visible_text(message['content']) %}
                {%- else %}
                    {%- set content = think_begin_token + think_end_token + visible_text(message['content']) %}
                {%- endif %}
            {%- else %}
                {%- set content = think_begin_token + think_end_token + visible_text(message['content']) %}
            {%- endif %}
        {%- endif %}
        {%- if prev_ns.is_tool %}
            {{- toolresponses_end_token }}
        {%- endif %}
        {{- assistant_token }}
        {%- if message['tool_calls'] is defined and message['tool_calls'] %}
            {%- set prev_ns.is_tool_first = true %}
            {{- content }}
            {{- toolcalls_begin_token + '\n' }}
            {%- for tool in message['tool_calls'] %}
                {%- set arguments = tool['function']['arguments'] %}
                {{- toolcall_begin_token + tool['function']['name'] + toolsep_token + '\n' }}
                {%- for key, value in arguments.items() %}
                    {{- argkey_begin_token + key + argkey_end_token + '\n' }}
                    {%- if value is not string %}
                        {%- set value = value | tojson(ensure_ascii=False) %}
                    {%- endif %}
                    {{- argvalue_begin_token + value + argvalue_end_token + '\n' }}
                {%- endfor %}
                {{- toolcall_end_token + '\n' }}
            {%- endfor %}
            {{- toolcalls_end_token + eos_token }}
        {%- else %}
            {%- if loop.last and raw_last_assistant %}
                {{- visible_text(message['content']) }}
            {%- elif not loop.last or is_training %}
                {{- content + eos_token }}
            {%- else %}
                {{- content }}
            {%- endif %}
        {%- endif %}
        {%- set prev_ns.is_tool = false %}
    {%- endif %}
    {%- if message['role'] == 'tool' %}
        {%- set prev_ns.is_tool = true %}
        {%- if prev_ns.is_tool_first %}
            {{- toolresponses_begin_token + '\n' }}
            {%- set prev_ns.is_tool_first = false %}
        {%- endif %}
        {{- toolresponse_begin_token + '\n' + visible_text(message['content']) + '\n' + toolresponse_end_token + '\n' }}
    {%- endif %}
    {%- if loop.last and message['role'] == 'assistant' %}
        {%- set last_ns.last_is_assistant = true %}
    {%- endif %}

{%- endfor %}
{%- if prev_ns.is_tool %}
    {{- toolresponses_end_token }}
{%- endif %}
{%- if add_generation_prompt %}
    {%- if not last_ns.last_is_assistant %}
        {%- if reasoning_effort is defined and reasoning_effort in ['low', 'high'] %}
            {{- assistant_token + think_begin_token }}
        {%- elif reasoning_effort is defined and reasoning_effort == 'no_think' %}
            {{- assistant_token + think_begin_token + think_end_token }}
        {%- else %}
            {{- assistant_token }}
        {%- endif %}
    {%- endif %}
{%- endif %}

Sampling defaults

top_k: -1
top_p: 1
temperature: 0.9

Stop strings

<｜hy_eos:opensource｜>

Evidence & provenance

Source

Provenance: https://huggingface.co/tencent/Hy3
Revision pin: 716aa7241bd6d95896be4ebfc761162a9c4d49ef
Manifest: None

License

Name: apache-2.0
Commercial use: yes
Access: Open
Notes: tencent/Hy3 LICENSE states: licensed under Apache-2.0 (full Apache text, NO territorial restriction) — cleaner than the Tencent Community License the batch prompt anticipated; freely redistributable. No official/unsloth GGUF exists yet (only community conversions of a 295B model); kept metadata-only per don-not-force rule until a credible GGUF appears. 2026-07-12.

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