GPT-5.2 vs Aurora Alpha

Compare GPT-5.2 by OpenAI against Aurora Alpha by OpenRouter, context windows of 400K vs 128K, tested across 52 shared challenges. Updated April 2026.

Which is better, GPT-5.2 or Aurora Alpha?

GPT-5.2 and Aurora Alpha are both competitive models. GPT-5.2 costs $1.75/M input tokens vs $0/M for Aurora Alpha. Context windows: 400K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.2 and Aurora Alpha

GPT-5.2 is made by openai while Aurora Alpha is from openrouter. GPT-5.2 has a 400K token context window compared to Aurora Alpha's 128K. On pricing, GPT-5.2 costs $1.75/M input tokens vs $0/M for Aurora Alpha.

Our Verdict
GPT-5.2
GPT-5.2
Aurora Alpha
Aurora AlphaRunner-up

No community votes yet. On paper, GPT-5.2 has the edge — bigger model tier, bigger context window, major provider backing.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

GPT-5.2 uses 2.0x more transitions

GPT-5.2
Aurora Alpha
64%Vocabulary52%
16wSentence Length21w
0.34Hedging0.43
9.4Bold6.3
3.9Lists2.2
0.06Emoji0.10
0.89Headings0.69
0.31Transitions0.16
Based on 15 + 22 text responses
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GPT-5.2Aurora Alpha

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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