GPT-5 Mini vs Inception: Mercury

Compare GPT-5 Mini by OpenAI against Inception: Mercury by Inception, tested across 43 shared challenges. Updated April 2026.

Which is better, GPT-5 Mini or Inception: Mercury?

GPT-5 Mini and Inception: Mercury are both competitive models. GPT-5 Mini costs $0.25/M input tokens vs $10/M for Inception: Mercury. Compare their real outputs side by side below.

Key Differences Between GPT-5 Mini and Inception: Mercury

GPT-5 Mini is made by openai while Inception: Mercury is from inception. On pricing, GPT-5 Mini costs $0.25/M input tokens vs $10/M for Inception: Mercury.

Our Verdict
GPT-5 Mini
GPT-5 Mini
Inception: Mercury
Inception: MercuryRunner-up

No community votes yet. On paper, GPT-5 Mini has the edge — newer, major provider backing.

GPT-5 Mini is 5.0x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

Inception: Mercury uses 489.0x more bold

GPT-5 Mini
Inception: Mercury
62%Vocabulary55%
21wSentence Length40w
0.16Hedging0.39
0.0Bold4.9
3.4Lists3.8
0.00Emoji0.04
0.00Headings1.04
0.05Transitions0.03
Based on 15 + 17 text responses
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GPT-5 MiniInception: Mercury

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
Free preview13 of 58 slides
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