Claude 2 vs 
GPT-5.6 Luna Pro
GPT-5.6 Luna Pro is cheaper than Claude 2 at $1/M vs $11.02/M input tokens.
Simple Falling Object Game
Catch the falling object. Paddle at the bottom, score at the top, one file.
Loading the build
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Which answer wins?
Written rounds
2 promptsSeven pantry ingredients, one dish, and a name worth saying out loud.
Claude 2: Here is a 7-ingredient recipe for a sweet dish I'll call "Cinnamon Apple Surprise": Cinnamon Apple Surprise Ingredients: 3 apples, cored and sliced 1⁄4 cup brown sugar 1⁄4 cup all-purpose flour 1 tsp ground cinnamon 1⁄4 tsp nutmeg 2 tbsp butter, melted 1 refrigerated pie crust Instructions: Preheat oven to 375°F.
GPT-5.6 Luna Pro: Pantry Stardust Peanut Butter Oat Cookies Prep time: 10 minutes Cook time: 10–12 minutes Makes: About 12 cookies Ingredients 1 cup rolled oats ½ cup all-purpose flour ½ cup peanut butter ½ cup granulated sugar 1 large egg ½ teaspoon baking soda ¼ teaspoon salt Instructions Preheat the oven to 350°F (175°C) and line a…
One month, three habits, someone starting from nothing.
Claude 2: Here is a 1-month beginner health and longevity plan focused on diet, exercise, and sleep: Diet: Eliminate sugary drinks and limit sweets. Replace with water and fruits. Eat more veggies. Aim for 1-2 cups with each meal. Focus on dark leafy greens, broccoli, carrots. Increase fiber intake.
GPT-5.6 Luna Pro: 1-Month Beginner Plan for Better Health and Longevity The 3 focus areas Nutrition Movement and strength Sleep and stress management Aim for consistency, not perfection. Start small enough that you can repeat the habits even on busy days.
Price and specs
| Spec | Claude 2 | GPT-5.6 Luna Pro |
|---|---|---|
| Input price | $11.02/M tokens | $1/M tokens |
| Output price | $32.68/M tokens | $6/M tokens |
| Context window | 100K tokens | 1.1M tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jun 2023 | Jul 2026 |
| At 10M a month | $110 | $10.00 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Claude 2
No hosts listed on OpenRouter.
GPT-5.6 Luna Pro2 hosts
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Claude 2 and GPT-5.6 Luna Pro?
Claude 2 is developed by Anthropic while GPT-5.6 Luna Pro is developed by OpenAI. Claude 2 has a 100K token context window vs GPT-5.6 Luna Pro's 1.1M. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.
Which is better, Claude 2 or GPT-5.6 Luna Pro?
It depends on your use case. Claude 2 and GPT-5.6 Luna Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.
How much does Claude 2 cost compared to GPT-5.6 Luna Pro?
Claude 2 costs $11.02/M input tokens and GPT-5.6 Luna Pro costs $1/M input tokens. GPT-5.6 Luna Pro is $10.02/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Claude 2 and GPT-5.6 Luna Pro on Rival?
This page shows a side-by-side comparison of Claude 2 and GPT-5.6 Luna Pro across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
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