GPT-5.5 vs Grok 4.5 for research skills

- **Bayeux Tapestry — Primary source:** made in the late 11th century, close to the events of 1066, and depicts the Norman Conquest.  
- **2019 GCSE textbook chapter — Secondary source:** a modern educational summary based on historians’ interpretations and evidence.  
- **Anglo-Saxon Chronicle entry for 1066 — Primary source:** a near-contemporary written account from the Anglo-Saxon world.  
- **Historian’s 1998 biography of William the Conqueror — Secondary source:** a modern historian’s interpretation using primary and secondary evidence.…

**Primary:** Bayeux Tapestry – near-contemporary embroidered narrative (c. 1070s) made within living memory of the 1066 events.  
**Secondary:** 2019 GCSE textbook chapter – modern educational synthesis and interpretation of earlier evidence.  
**Primary:** Anglo-Saxon Chronicle entry for 1066 – contemporary (or near-contemporary) annalistic record compiled close to the events.  
**Secondary:** Historian’s 1998 biography of William – modern scholarly analysis and narrative constructed from primary evidence.  
**Secondary:** Museum blog post – r…