o3 Mini
Sally has 1 sister.
Explanation:
Sally's 3 brothers each have 2 sisters. Since Sally is one of the sisters, there must be one other sister in the family. Thus, aside from Sally, there is one more sister.
Compare o3 Mini by OpenAI against Claude Opus 4 by Anthropic, context windows of 64K vs 200K, tested across 21 shared challenges. Updated March 2026.
o3 Mini and Claude Opus 4 are both competitive models. o3 Mini costs $1.1/M input tokens vs $15/M for Claude Opus 4. Context windows: 64K vs 200K tokens. Compare their real outputs side by side below.
o3 Mini is made by openai while Claude Opus 4 is from anthropic. o3 Mini has a 64K token context window compared to Claude Opus 4's 200K. On pricing, o3 Mini costs $1.1/M input tokens vs $15/M for Claude Opus 4.
No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, newer, bigger context window.
o3 Mini is 17x cheaper per token — worth considering if cost matters.
Ask them anything yourself
21 fights queued
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
Sally has 1 sister.
Explanation:
Sally's 3 brothers each have 2 sisters. Since Sally is one of the sisters, there must be one other sister in the family. Thus, aside from Sally, there is one more sister.
I need to work through this step-by-step.
Given information:
Since Sally is one of the sisters that each brother has, and each brother has 2 sisters total, that means th ere must be exactly 2 sisters in the family.
The 2 sisters are:
Therefore, Sally has 1 sister.
Tests an AI's randomness and creativity
Tests an AI's ability to generate vector graphics
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Tests an AI's humor and creative writing ability
Recreate an interactive, classic Mario level in a single HTML file.
Tests an AI's ability to replicate an existing UI with Tailwind CSS
Tests an AI's ability to create interactive web elements
Tests an AI's ability to create a detailed world map in SVG format
Generate a unique and simple recipe with common ingredients.
Create a starter plan for improving long-term health.
Recreate a classic, retro, macOS Desktop UI. Make it interactive and nostalgic, make it as interactive as you can, you can be creative. Feel free to showcase your skills. The entire application must be a single-page self-contained HTML file.
9+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy