---
license: apache-2.0
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*
dataset_info:
  features:
  - name: messages
    list:
    - name: role
      dtype: string
    - name: content
      dtype: string
    - name: thinking
      dtype: string
    - name: name
      dtype: string
    - name: tool_calls
      list: json
  - name: tools
    list: json
  splits:
  - name: train
    num_bytes: 1774459
    num_examples: 887
  download_size: 1748419
  dataset_size: 1774459
---

# Claude Opus 4.6 Extended Reasoning

This is a reasoning dataset generated using Claude Opus 4.6 with extended reasoning

It contains distilled reasoning traces from Bullshit Bench for bullshit detection, legal and life decisions data for generalization, traces for improving the models understanding of vague and lazy prompts as well as multi turn tool calling traces.

## Formatting guide

### Non-tool row

```json
{
  "messages": [
    {"role": "system", "content": "You are Claude. A friendly, helpful assistant"},
    {"role": "user", "content": "..."},
    {"role": "assistant", "thinking": "...", "content": "Final answer..."}
  ]
}
```

### Tool row

```json
{
  "messages": [
    {"role": "system", "content": "You are Claude. A friendly, helpful assistant"},
    {"role": "user", "content": "..."},
    {
      "role": "assistant",
      "thinking": "...",
      "content": "",
      "tool_calls": [
        {
          "type": "function",
          "function": {
            "name": "web_search",
            "arguments": {"query": "..."}
          }
        }
      ]
    },
    {"role": "tool", "name": "web_search", "content": "..."},
    {"role": "assistant", "content": "Final answer after tool result..."}
  ],
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "web_search",
        "description": "...",
        "parameters": {"type": "object", "properties": {"query": {"type": "string"}}, "required": ["query"]}
      }
    }
  ]
}
```

`thinking` is only included when a reasoning trace is present. All other fields, including `tool_calls` inside messages and the top-level `tools` schema, are preserved as-is.