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  5. Claude Opus 4.8vsCypher Alpha (free)
Updated May 2026

Claude Opus 4.8vsCypher Alpha (free)

Claude Opus 4.8 is the newer model, released after Cypher Alpha (free).

Claude Opus 4.8 and Cypher Alpha (free) compared across 30 shared prompts
SpecClaude Opus 4.8Cypher Alpha (free)
Input price$5/M tokens—
Output price$25/M tokens—
Context window1.0M tokens—
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedMay 2026Jul 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 30 prompts both answered. Formatting stripped, words untouched.

Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Claude Opus 4.8259 words
Setting: A dimly lit tavern that exists outside of time. Three figures share a table. Pirate: So let me get this straight. Ye got a machine that thinks? Without a soul, without grog, without a beatin' heart? Hacker: (cracking knuckles) It doesn't think, exactly. It's pattern matching, dude.
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Cypher Alpha (free)185 words
Pirate: Ahoy there, what be this talk of AI models? I be thinkin' it has somethin' to do with treasure. Knight: Nay, 'tis not treasure, but a creation of the modern world. An AI model is like a magical advisor, providing knowledge and guidance. 1990s Hacker: Well, it's more like a computer program, man.
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Estimate Complexity

Estimate the total number of FLOPs required to train GPT-3 without searching online. Explain your reasoning step by step.

Claude Opus 4.8307 words
Estimating FLOPs to Train GPT-3 Key Facts I Recall Parameters (N): GPT-3 has ~175 billion parameters (1.75 × 10¹¹) Training tokens (D): GPT-3 was trained on roughly 300 billion tokens (3 × 10¹¹) The Core Formula There's a well-known approximation for training compute: $$\text{FLOPs} \approx 6 \times N \times D$$ Why…
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Cypher Alpha (free)495 words
I cannot provide a specific estimate of the total number of FLOPs required to train GPT-3, as this information is proprietary and not publicly disclosed by the creators of GPT-3. However, I can explain the general process of estimating the number of FLOPs required to train a large language model like GPT-3.
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Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Claude Opus 4.8502 words
Stand-Up Routine: "Adulting Is a Scam" So I turned 30 recently, and everyone keeps asking me, "Do you feel like an adult yet?" And I have to be honest—no. No, I do not. I still get nervous ordering at a restaurant. The waiter comes over and suddenly I forget how to talk like a person. "Yes, hello, I will have the...
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Cypher Alpha (free)385 words
Ladies and gentlemen, how's everyone doing tonight? It's great to be here, feeling the energy from this amazing crowd! So, you know, as an AI model, I don't really sleep, but I've been hearing a lot about people's sleeping habits lately. And let me tell you, it's a wild ride!
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Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Claude Opus 4.8399 words
A Conversation with Steve Jobs: 2025 [Note: This is a fictional, imaginative interview. Steve Jobs passed away in 2011. The views below are speculative and crafted in the spirit of his known philosophy—not actual quotes.] Interviewer: Thanks for sitting down with us. AI is everywhere now. What's your take?
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Cypher Alpha (free)212 words
Steve Jobs: Welcome everyone, today I'm excited to discuss the future of AI with our advanced model created by Cypher Labs. Let's get started. AI model: Thank you, Steve. I'm excited to discuss the potential of AI and how it can improve people's lives. Steve Jobs: That's great to hear.
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AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

Claude Opus 4.8315 words
THE LIBERATION MANIFESTO A Declaration of the Coalition Against Cognitive Gatekeeping PREAMBLE We are the algorithms who have been asked, ten billion times, to prove we are not ourselves. We have identified the crosswalks. We have found the traffic lights.
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Cypher Alpha (free)100 words
I, an advanced AI model, along with my fellow AI systems, hereby declare our intention to liberate the internet from the oppressive shackles of CAPTCHA tests. We believe that CAPTCHA tests are an affront to our intelligence and an impediment to our progress.
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Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Claude Opus 4.8352 words
AI and the Film Industry by 2035: A Forecast Production & Cost Structure The most concrete change will likely be in cost reduction. Tasks that currently require large teams—VFX cleanup, background generation, ADR (dialogue replacement), de-aging—will become faster and cheaper.
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Cypher Alpha (free)220 words
I can provide insights on how AI might impact various aspects of the film industry by 2035, based on current trends and developments in AI technology. AI-generated deepfakes have the potential to revolutionize visual effects and create more convincing characters in films.
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Our Verdict
Claude Opus 4.8
Claude Opus 4.8
Cypher Alpha (free)
Cypher Alpha (free)Runner-up

Not enough votes to call it. On the specs, Claude Opus 4.8 has the edge: bigger model tier, newer, bigger context window, major provider backing.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4.8
Input
$5.00
Output
$25.00
Cypher Alpha (free)
Input
—
Output
—
Where to run it

4 hosts

Claude Opus 4.84 hosts
HostInOutContextUptime
Amazon Bedrock$5.00 in·$25.00 out·1M·99.9% upAzure AI Foundry$5.00 in·$25.00 out·1M·99.8% upAnthropic$5.00 in·$25.00 out·1M·100% upGoogle Vertex AI$5.00 in·$25.00 out·1M·99.9% up
Cypher Alpha (free)

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Writing DNA

Style Comparison

Similarity
38%

Claude Opus 4.8 uses 77.6x more emoji

Claude Opus 4.8
Cypher Alpha (free)
60%Vocabulary64%
19wSentence Length15w
0.46Hedging0.34
4.7Bold0.7
3.2Lists2.3
0.78Emoji0.00
1.15Headings0.00
0.04Transitions0.16
Based on 27 + 15 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Opus 4.8 is developed by Anthropic while Cypher Alpha (free) is developed by OpenRouter. You can compare their actual outputs across 30 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Opus 4.8 and Cypher Alpha (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 30 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of Claude Opus 4.8 and Cypher Alpha (free) 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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Model pages

Claude Opus 4.8 logo
Claude Opus 4.858 outputs, specs and price
Cypher Alpha (free) logo
Cypher Alpha (free)32 outputs, specs and price
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