4 models have responded to the "Logic Puzzle" challenge. Compare their approaches side-by-side on RIVAL. This response is part of RIVAL's open dataset of 5,600+ AI model responses.
Logic Puzzle
Grok 4 Fast Free's response to the 'Logic Puzzle' challenge.
xAI: Grok 4 Fast (free)
September 20, 2025
Text
?Prompt
Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?
Response
1
Sally has 1 sister. The family consists of 3 brothers and 2 sisters (Sally and one other). Each brother thus has 2 sisters, which matches the given information.
Logic Puzzle
Turn this model response into notes, narration, or a short video
Partner link
About xAI: Grok 4 Fast (free)
Capabilities
ConversationAnalysisCode Generation
Categories
TextCodeMultimodal
Specifications
- Provider
- Xai
- Released
- 2025-09-19
- Size
- LARGE
- Parameters
- Not disclosed
- Context
- 2,000,000 tokens
