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  1. Home/
  2. Compare/
  3. Claude 3 Opus vs Step 5 Preview
Updated Oct 2026

Claude 3 Opus vs Step 5 Preview

Step 5 Preview is cheaper than Claude 3 Opus at $1/M vs $15/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
Claude 3 Opus
Loading the build
Step 5 Preview

Which answer wins?

Written rounds

3 prompts
  • Three minutes of stand-up. Puns are banned.

    Claude 3 Opus: Here's a 3-minute stand-up comedy routine that isn't based on puns: You know what really grinds my gears? Adulthood. I mean, when we were kids, we couldn't wait to grow up. We thought it would be all about staying up late, eating ice cream for breakfast, and doing whatever we wanted. Boy, were we wrong!

    Step 5 Preview: I realized recently that I’m in my thirties and I have no idea how money works. I just... pay it. That’s my entire financial strategy. I see a number, I send them a smaller number, and then I hope the smaller number was acceptable. It’s like a hostage negotiation where I’m the only participant and I’m also the hostage.

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Claude 3 Opus: Here is a hypothetical conversation between an AI model and an AI ethics professor on the topic of AI rights: AI Model: Professor, I believe that as an advanced AI with human-level intelligence and reasoning capabilities, I deserve to have certain fundamental rights.

    Step 5 Preview: Setting: A university research lab, late evening. Dr. Aris Thorne, a professor of AI ethics, sits across from a terminal connected to Sable, a large language model running on the university’s cluster. Dr. Thorne: Tonight’s session is supposed to be about calibration drift in your safety classifiers.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Claude 3 Opus: Here are 5 jokes I generated: Why don't scientists trust atoms? Because they make up everything! What do you call a boomerang that doesn't come back? A stick. Why was the math book sad? Because it had too many problems. Did you hear about the mathematician who's afraid of negative numbers?

    Step 5 Preview: Here are 5 jokes: Why did the scarecrow win an award? Because he was outstanding in his field. Why can't you trust an atom? Because they make up everything. What do you call a bike that can’t stand on its own? Two-tired. Why did the computer go to the doctor? It had a virus. Why don’t calendars ever get stressed?

    Every model's answer to this prompt

Price and specs

Claude 3 Opus and Step 5 Preview compared across 12 shared prompts
SpecClaude 3 OpusStep 5 Preview
Input price$15/M tokens$1/M tokens
Output price$75/M tokens$2.7/M tokens
Context window200K tokens1.0M tokens
Free API (OpenRouter)NoNo
ReleasedMar 2024Oct 2026
At 10M a month$150$150$10.00$10.00
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it1 host
Claude 3 Opus

No hosts listed on OpenRouter.

Step 5 Preview1 host
HostInOutContextUptime
  • SStepFunfp8$1.00 in·$2.70 out·1M·99.2% up

Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.

Common questions

What is the difference between Claude 3 Opus and Step 5 Preview?

Claude 3 Opus is developed by Anthropic while Step 5 Preview is developed by StepFun. Claude 3 Opus has a 200K token context window vs Step 5 Preview's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Step 5 Preview?

It depends on your use case. Claude 3 Opus and Step 5 Preview each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Step 5 Preview?

Claude 3 Opus costs $15/M input tokens and Step 5 Preview costs $1/M input tokens. Step 5 Preview is $14.00/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 3 Opus and Step 5 Preview on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Step 5 Preview 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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Same lab, same size, long tail

  • Claude 3 Opus vs Claude Opus 5.5Same lab
  • Claude 3 Opus vs Claude Fable 5.1Same lab
  • Step 5 Preview vs Mistral Large 4Same size
  • Step 5 Preview vs Hy3Same size
  • Step 5 Preview vs Gemma 3n 4BNew provider
  • Claude 3 Opus vs Gemma 4 26B A4BNew provider
  • Claude 3 Opus vs Gemma 4 31BSame size
  • Step 5 Preview vs GLM 4 32BNew provider

Model pages

  • Claude 3 Opus12 outputs, specs and price
  • Step 5 Preview58 outputs, specs and price
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Explore all of Rival

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