---
base_model:
- Qwen/Qwen3-8B
language:
- en
library_name: transformers
license: mit
tags:
- LLM
pipeline_tag: text-generation
---
# 🔍 WebExplorer-8B

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A state-of-the-art 8B parameter web agent model designed for complex information-seeking tasks and long-horizon reasoning.

## 🌟 Overview

WebExplorer-8B is an advanced web navigation agent trained on **WebExplorer**-QA. The model demonstrates exceptional performance on challenging information-seeking benchmarks while maintaining efficiency with only 8 billion parameters.

## ✨ Key Features

- 🌐 **Long-horizon Reasoning**: Supports up to 128K context length and 100 tool calling turns
- 🛠️ **Tool Utilization**: Masters search and browse functionalities
- 🏆 **State-of-the-art Performance**: Achieves best-in-class results among models under 10B parameters

## 🏗️ Model Architecture

Built on Qwen3-8B base model and trained through a two-phase approach:

1. **Supervised Fine-tuning (SFT)**: Cold-start initialization with high-quality trajectories
2. **Reinforcement Learning (RL)**: Enhanced using GRPO algorithm with progressive context expansion

## 📊 Performance

WebExplorer-8B achieves state-of-the-art performance across multiple information-seeking benchmarks at its scale:

| Model | BC-en | BC-zh | GAIA | WebWalkerQA | FRAMES | Xbench-DS | HLE |
|-------|-------|-------|------|-------------|--------|-----------|-----|
| OpenAI-o3† | 50.9 | 58.1 | 70.5† | 71.7 | 84.0 | 66.7 | 20.2 |
| Claude-4-Sonnet† | 12.2 | 29.1 | 68.3† | 61.7 | 80.7 | 64.6 | 20.3 |
| GLM-4.5 | 26.4 | 37.5 | 66.0† | 65.6† | 78.9† | 70.0† | 21.2† |
| DeepSeek-V3.1 | 30.0 | 49.2 | 63.1† | 61.2† | 83.7 | 71.2 | 29.8 |
| Kimi-K2† | 14.1 | 28.8 | 57.7 | 63.0 | 72.0 | 50.0 | 18.1 |
|====|====|====|====|====|====|====|====|
| WebShaper-72B | - | - | **60.0** | 52.2 | - | - | - |
| WebShaper-32B (QwQ) | - | - | 53.3 | 49.7 | - | - | - |
| WebShaper-32B | - | - | 52.4 | 51.4 | - | - | - |
| WebSailor-72B | 12.0 | 30.1 | 55.4 | - | - | **55.0** | - |
| WebSailor-32B | 10.5 | 25.5 | 53.2 | - | - | 53.3 | - |
| WebSailor-7B | 6.7 | 14.2 | 33.0 | - | - | 34.3 | - |
| ASearcher-Web-QwQ | 5.2 | 15.6 | 52.8 | 34.3 | 70.9 | 42.1 | 12.5 |
| WebThinker-32B | 2.8 | - | 48.5 | 46.5 | - | - | 15.8 |
| MiroThinker-32B-DPO-v0.1 | 13.0 | 17.0 | 57.3 | 49.3 | 71.7 | - | 11.8 |
| MiroThinker-8B-DPO-v0.1 | 8.7 | 13.6 | 46.6 | 45.7 | 64.4 | - | - |
| WebExplorer-8B (SFT) | 7.9 | 21.3 | 43.7 | 59.8 | 72.6 | 47.5 | 16.0 |
| WebExplorer-8B (RL) | <u>**15.7**</u> | <u>**32.0**</u> | <u>50.0</u> | <u>**62.7**</u> | <u>**75.7**</u> | <u>53.7</u> | <u>**17.3**</u> |

Accuracy (%) of web agents on information-seeking benchmarks. BC-en and BC-zh denote BrowseComp-en and BrowseComp-zh respectively. XBench-DS refers to XBench-DeepSearch. **Bold** indicates the best performance among open-source models < 100B, while <u>underlined</u> values represent the best performance among models < 10B parameters. All scores of WebExplorer-8B are computed as Avg@4 using LLM-as-Judge. Entries marked with a dagger (†) were reproduced by us under our scaffold: on model name = entire row; on a number = that entry only.


## 🛠️ Tool Schema

WebExplorer-8B supports two tools for web interaction:

### 1. Browse Tool

```json
{
    "name": "browse",
    "type": "function",
    "description": "Extract specific information from a webpage",
    "parameters": {
        "type": "object",
        "properties": {
            "url": {
                "type": "string",
                "description": "Target URL to browse. The webpage content will be processed by the LLM for information extraction."
            },
            "query": {
                "type": "string",
                "description": "Specific query about the webpage content. The LLM will analyze the content to answer this query."
            }
        },
        "required": ["url", "query"]
    }
}
```



### 2. Search Tool

```json
{
    "name": "search",
    "type": "function",
    "description": "Perform web search queries",
    "parameters": {
        "type": "object",
        "properties": {
            "queries": {
                "type": "array",
                "items": {
                    "type": "string"
                },
                "description": "List of search queries. Returns search results containing title, URL, and snippet for each query."
            }
        },
        "required": ["queries"]
    }
}
```



