GPT-5.2 vs Inception: Mercury

Compare GPT-5.2 by OpenAI against Inception: Mercury by Inception, context windows of 400K vs 32K, tested across 50 shared challenges. Updated April 2026.

Which is better, GPT-5.2 or Inception: Mercury?

GPT-5.2 and Inception: Mercury are both competitive models. GPT-5.2 costs $1.75/M input tokens vs $10/M for Inception: Mercury. Context windows: 400K vs 32K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.2 and Inception: Mercury

GPT-5.2 is made by openai while Inception: Mercury is from inception. GPT-5.2 has a 400K token context window compared to Inception: Mercury's 32K. On pricing, GPT-5.2 costs $1.75/M input tokens vs $10/M for Inception: Mercury.

Our Verdict
GPT-5.2
GPT-5.2
Inception: Mercury
Inception: MercuryRunner-up

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

Slight edge
Writing DNA

Style Comparison

Similarity
99%

GPT-5.2 uses 9.3x more transitions

GPT-5.2
Inception: Mercury
64%Vocabulary55%
16wSentence Length40w
0.34Hedging0.39
9.4Bold4.9
3.9Lists3.8
0.06Emoji0.04
0.89Headings1.04
0.31Transitions0.03
Based on 15 + 17 text responses
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GPT-5.2Inception: Mercury

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