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Model: RecursiveMAS/Sequential-Light-Solver-Qwen2.5-Math-1.5B
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---
base_model:
- Qwen/Qwen2.5-Math-1.5B
license: mit
---
# Sequential-Light-Solver-Qwen2.5-Math-1.5B
[🌐 Project Page](https://recursivemas.github.io) | [💻 Code](https://github.com/RecursiveMAS/RecursiveMAS) | [📄 Paper](https://arxiv.org/abs/2604.25917)
We introduce RecursiveMAS, a multi-agent framework that scales agent collaboration through latent-space recursion.
RecursiveMAS treats a multi-agent system as a unified recursive computation, where heterogeneous agents iteratively exchange, refine, and evolve their latent states across recursion rounds. In the Sequential-Light setting, the Solver Agent is responsible for producing the final response based on the planning and critique information refined through RecursiveLink modules.
## Model Details
| Item | Description |
|---|---|
| Model | Sequential-Light-Solver-Qwen2.5-Math-1.5B |
| Collaboration Style | Sequential-Light |
| Agent Role | Solver Agent |
| Base Model | Qwen2.5-Math-1.5B |
⚠️ **Note:** This checkpoint is a **role-specific agent** in [**RecursiveMAS**](https://arxiv.org/abs/2604.25917), rather than a standalone model intended for plain-text generation.
For detailed usage instructions, please refer to our [GitHub repository](https://github.com/RecursiveMAS/RecursiveMAS).
## Model Collections for RecursiveMAS
| Style | Model Collection |
|---|---|
| Sequential-Style | [🤗 HuggingFace](https://huggingface.co/collections/RecursiveMAS/sequential-style-recursivemas) |
| Mixture-Style | [🤗 HuggingFace](https://huggingface.co/collections/RecursiveMAS/mixture-style-recursivemas) |
| Distillation-Style | [🤗 HuggingFace](https://huggingface.co/collections/RecursiveMAS/distillation-style-recursivemas) |
| Deliberation-Style | [🤗 HuggingFace](https://huggingface.co/collections/RecursiveMAS/deliberation-style-recursivemas) |
## Experiment Results
<p align="center">
<img src="https://raw.githubusercontent.com/RecursiveMAS/RecursiveMAS/main/assets/hero_fig.png" width="95%" alt="RecursiveMAS Experiment Results">
</p>
## Citation
```bibtex
@misc{recursivemas,
title={Recursive Multi-Agent Systems},
author={Xiyuan Yang and Jiaru Zou and Rui Pan and Ruizhong Qiu and Pan Lu and Shizhe Diao and Jindong Jiang and Hanghang Tong and Tong Zhang and Markus J. Buehler and Jingrui He and James Zou},
year={2026},
eprint={2604.25917},
archivePrefix={arXiv},
primaryClass={cs.AI},
url={https://arxiv.org/abs/2604.25917},
}
```

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{
"adapter_type": "ln_res_adapter"
}

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{%- if tools %}
{{- '<|im_start|>system\n' }}
{%- if messages[0]['role'] == 'system' %}
{{- messages[0]['content'] }}
{%- else %}
{{- 'Please reason step by step, and put your final answer within \\boxed{}.' }}
{%- endif %}
{{- "\n\n# Tools\n\nYou may call one or more functions to assist with the user query.\n\nYou are provided with function signatures within <tools></tools> XML tags:\n<tools>" }}
{%- for tool in tools %}
{{- "\n" }}
{{- tool | tojson }}
{%- endfor %}
{{- "\n</tools>\n\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\n<tool_call>\n{\"name\": <function-name>, \"arguments\": <args-json-object>}\n</tool_call><|im_end|>\n" }}
{%- else %}
{%- if messages[0]['role'] == 'system' %}
{{- '<|im_start|>system\n' + messages[0]['content'] + '<|im_end|>\n' }}
{%- else %}
{{- '<|im_start|>system\nPlease reason step by step, and put your final answer within \\boxed{}.<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- for message in messages %}
{%- if (message.role == "user") or (message.role == "system" and not loop.first) or (message.role == "assistant" and not message.tool_calls) %}
{{- '<|im_start|>' + message.role + '\n' + message.content + '<|im_end|>' + '\n' }}
{%- elif message.role == "assistant" %}
{{- '<|im_start|>' + message.role }}
{%- if message.content %}
{{- '\n' + message.content }}
{%- endif %}
{%- for tool_call in message.tool_calls %}
{%- if tool_call.function is defined %}
{%- set tool_call = tool_call.function %}
{%- endif %}
{{- '\n<tool_call>\n{"name": "' }}
{{- tool_call.name }}
{{- '", "arguments": ' }}
{{- tool_call.arguments | tojson }}
{{- '}\n</tool_call>' }}
{%- endfor %}
{{- '<|im_end|>\n' }}
{%- elif message.role == "tool" %}
{%- if (loop.index0 == 0) or (messages[loop.index0 - 1].role != "tool") %}
{{- '<|im_start|>user' }}
{%- endif %}
{{- '\n<tool_response>\n' }}
{{- message.content }}
{{- '\n</tool_response>' }}
{%- if loop.last or (messages[loop.index0 + 1].role != "tool") %}
{{- '<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
{{- '<|im_start|>assistant\n' }}
{%- endif %}

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{
"architectures": [
"Qwen2ForCausalLM"
],
"attention_dropout": 0.0,
"bos_token_id": 151643,
"dtype": "bfloat16",
"eos_token_id": 151645,
"hidden_act": "silu",
"hidden_size": 1536,
"initializer_range": 0.02,
"intermediate_size": 8960,
"layer_types": [
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"max_position_embeddings": 4096,
"max_window_layers": 21,
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"num_attention_heads": 12,
"num_hidden_layers": 28,
"num_key_value_heads": 2,
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"rms_norm_eps": 1e-06,
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"rope_type": "default"
},
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"tie_word_embeddings": true,
"transformers_version": "5.3.0",
"use_cache": true,
"use_sliding_window": false,
"vocab_size": 151936
}

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"bos_token_id": 151643,
"do_sample": false,
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151643
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"transformers_version": "5.3.0"
}

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{
"format_version": 1,
"paradigm": "sequential",
"variant": "light",
"role": "Solver",
"backbone": "Qwen2.5-Math-1.5B",
"shared_files": [
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"chat_template.jinja",
"config.json",
"generation_config.json",
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"tokenizer.json",
"tokenizer_config.json"
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"tasks": {
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"adapter.pt": "adapter(math).pt",
"adapter_config.json": "adapter_config.json",
"chat_template.jinja": "chat_template.jinja",
"config.json": "config.json",
"generation_config.json": "generation_config.json",
"tokenizer.json": "tokenizer.json",
"tokenizer_config.json": "tokenizer_config.json"
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"code": {
"adapter.pt": "adapter(code).pt",
"adapter_config.json": "adapter_config.json",
"chat_template.jinja": "chat_template.jinja",
"config.json": "config.json",
"generation_config.json": "generation_config.json",
"tokenizer.json": "tokenizer.json",
"tokenizer_config.json": "tokenizer_config.json"
}
}
}

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"backend": "tokenizers",
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"clean_up_tokenization_spaces": false,
"eos_token": "<|im_end|>",
"errors": "replace",
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