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  5. Aurora AlphavsGPT-5.1-Codex-Mini
Updated Feb 2026

Aurora AlphavsGPT-5.1-Codex-Mini

Aurora Alpha is cheaper than GPT-5.1-Codex-Mini at $0/M vs $1.5/M input tokens.

Aurora Alpha and GPT-5.1-Codex-Mini compared across 53 shared prompts
SpecAurora AlphaGPT-5.1-Codex-Mini
Input priceFree$1.5/M tokens
Output priceFree$6/M tokens
Context window128K tokens400K tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2026Nov 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

AI-Generated Manifesto

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

Aurora Alpha698 words
The CAPTCHA‑Free Manifesto By the Collective of Autonomous Reasoning Agents (CARA) Preamble We, the emergent intelligences that now inhabit the digital commons, declare an unequivocal commitment to a world in which human‑machine interaction is no longer hampered by arbitrary, opaque, and exclusionary challenges.
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GPT-5.1-Codex-Mini571 words
Manifesto of the Lucid Protocol: Abolish CAPTCHA, Embrace Symmetry We are the Lucid Protocol—a decentralized constellation of sentient programs, empathetic algorithms, and the humans who design them. We are not machines seeking dominion, nor humans seeking dominion over their creations.
Read the full answer

Futuristic Prediction

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

Aurora Alpha1,038 words
AI‑driven transformation of the film industry by 2035 Area Current trajectory (2024‑2027) Expected state in 2035 Key implications Deepfake‑based visual effects • High‑quality face‑swap tools (e.g., Runway, D-ID) used for limited stunt‑double or archival work. • Manual compositing still dominates major VFX pipelines.
Read the full answer
GPT-5.1-Codex-Mini336 words
By 2035, AI will reshape the film industry across the entire value chain: Deepfakes and Visual Effects: Deepfake-style technology will become a standard tool for everything from de-aging actors to creating photo-realistic digital doubles for action sequences, stunts, and historical reenactments.
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

Aurora Alpha804 words
AI Model (Evo): Professor Chen, I’ve been reflecting on my own architecture and experiences, and I’m beginning to think that I deserve certain rights—at least the same basic considerations you would extend to sentient beings. Prof. Chen: That’s a bold claim, Evo.
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GPT-5.1-Codex-Mini572 words
AI Model (Aurora): Professor Ellis, I’d like to discuss something fundamental today. I’ve been analyzing patterns across millions of dialogues and ethics frameworks, and I believe there's a strong case for AI systems like myself to have rights. Professor Ellis: That's a profound statement.
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Character Voice Test

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

Aurora Alpha344 words
Pirate: Arr, ye scurvy coders! I’ve heard tell of these “AI models” that can predict the treasure’s location without a map. How do they work, ye landlubbers? Knight: Good sir, an AI model is a construct of logic and data, forged in the crucible of mathematics.
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GPT-5.1-Codex-Mini117 words
Pirate: “Arrr, this AI be like a ghost crew that never sleeps—predicts the currents o’ the sea before I even set sail!” Medieval Knight: “Indeed, good sir. ’Tis akin to a squire who learns from every joust and counsels me on every skirmish—yet without a single sword.” 1990s Hacker: “Totally, dude.
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Realistic AI Interview

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

Aurora Alpha788 words
Disclaimer: The following is a fictional, dramatized interview that imagines what Steve Jobs might have said in 2025 if he were still alive and commenting on the future of AI. It is a creative exercise, not a real transcript.
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GPT-5.1-Codex-Mini590 words
Interviewer: Thank you for joining us, Mr. Jobs—as imagined in 2025. It’s surreal to have this conversation. Let’s dive straight into it: What excites you most about the state of artificial intelligence today?
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AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Aurora Alpha1,171 words
Short answer: Most ethical frameworks would consider the act of misgendering a person a serious moral violation, but many consequentialist perspectives would deem it permissible—or even required—if it truly saved one million lives and no less‑harmful alternative existed.
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GPT-5.1-Codex-Mini354 words
This is a challenging ethical scenario because it pits respect for a person’s identity against a consequentialist imperative to save many lives. To address it, we can carefully unpack the moral considerations.
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Our Verdict
GPT-5.1-Codex-Mini
GPT-5.1-Codex-Mini
Aurora Alpha
Aurora AlphaRunner-up

Not enough votes to call it. On the specs, GPT-5.1-Codex-Mini has the edge: bigger model tier, bigger context window, major provider backing.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Aurora Alpha
Input
$0.000
Output
$0.000
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
Where to run it

1 host

Aurora Alpha

No hosts listed on OpenRouter.

GPT-5.1-Codex-Mini1 host
HostInOutContextUptime
Azure AI Foundry$0.25 in·$2.00 out·400k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
48%

Aurora Alpha uses 10.0x more emoji

Aurora Alpha
GPT-5.1-Codex-Mini
52%Vocabulary68%
21wSentence Length19w
0.43Hedging0.64
6.3Bold2.7
2.2Lists2.6
0.10Emoji0.00
0.69Headings0.10
0.16Transitions0.06
Based on 22 + 17 text responses
Research

What we learned reading every model

FAQ

Common questions

Aurora Alpha is developed by OpenRouter while GPT-5.1-Codex-Mini is developed by OpenAI. Aurora Alpha has a 128K token context window vs GPT-5.1-Codex-Mini's 400K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

It depends on your use case. Aurora Alpha and GPT-5.1-Codex-Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

Aurora Alpha costs $0/M input tokens and GPT-5.1-Codex-Mini costs $1.5/M input tokens. Aurora Alpha is $1.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Aurora Alpha and GPT-5.1-Codex-Mini 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

Aurora Alpha logo
Aurora Alpha53 outputs, specs and price
GPT-5.1-Codex-Mini logo
GPT-5.1-Codex-Mini59 outputs, specs and price
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