Claude Opus 4
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Claude Opus 4 vs Inception: Mercury
Compare Claude Opus 4 by Anthropic against Inception: Mercury by Inception, in 1 community votes, claude opus 4 wins 100% of head-to-head duels, context windows of 200K vs 32K, tested across 35 shared challenges. Updated April 2026.
Which is better, Claude Opus 4 or Inception: Mercury?
Claude Opus 4 is the better choice overall, winning 100% of 1 blind community votes on Rival. Claude Opus 4 costs $15/M input tokens vs $10/M for Inception: Mercury. Context windows: 200K vs 32K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and Inception: Mercury
Claude Opus 4 is made by anthropic while Inception: Mercury is from inception. Claude Opus 4 has a 200K token context window compared to Inception: Mercury's 32K. On pricing, Claude Opus 4 costs $15/M input tokens vs $10/M for Inception: Mercury. In community voting, In 1 community votes, Claude Opus 4 wins 100% of head-to-head duels.
In 1 community votes, Claude Opus 4 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.
Our Verdict
Claude Opus 4Winner
Inception: MercuryRunner-up
Pick Claude Opus 4. In 1 blind votes, Claude Opus 4 wins 100% of the time. That's not luck.
Inception: Mercury is 7.5x cheaper per token — worth considering if cost matters.
Clear winner
Writing DNA
Style Comparison
Similarity
100%
Claude Opus 4 uses 8.1x more transitions
Claude Opus 4
Inception: Mercury
64%Vocabulary55%
62wSentence Length40w
0.52Hedging0.39
4.4Bold4.9
9.1Lists3.8
0.11Emoji0.04
1.87Headings1.04
0.27Transitions0.03
Based on 16 + 17 text responses
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