Company
Openstax
Sample prompts where it appears
What are the best free process engineering publications for students learning refinery operations basics?
Brands:American Petroleum Institute,Petrowiki,Spe,Nptel,Mit Opencourseware
What are the best free high school supplement course publishers for extra practice in core subjects?
Brands:Ck 12,Khan Academy,Openstax,
Google,School Yourself
Can you recommend academic subject tutoring sites for reviewing difficult math and science topics?
Brands:Khan Academy,Chegg Study,Wyzant,Varsity Tutors,Tutor
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How did Obsurfable measure this?
Obsurfable records AI answers to buyer-style prompts in its research corpus (3 observations for this page). Metrics are distributions over observations, not a single static ranking.
Which AI systems does Obsurfable collect answers from?
OpenAI, ChatGPT, Google, Gemini, Google AI Mode, Anthropic, Claude, Perplexity, Grok, DeepSeek, Mistral, Copilot, and Meta AI.