Claude 3 OpusvsMercury
Mercury is cheaper than Claude 3 Opus at $10/M vs $15/M input tokens.
| Spec | Claude 3 Opus | Mercury |
|---|---|---|
| Input price | $15/M tokens | $10/M tokens |
| Output price | $75/M tokens | $10/M tokens |
| Context window | 200K tokens | 32K tokens |
| Parameters | Not disclosed | Not disclosed |
| Free API (OpenRouter) | No | No |
| Released | Mar 2024 | Jun 2025 |
| HumanEval | 84.9% | 90.0% |
Our Verdict
Claude 3 Opus
MercuryRunner-up
Not enough votes to call it. On the specs, Claude 3 Opus has the edge: bigger model tier, bigger context window, major provider backing.
Mercury costs 7.5x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Claude 3 Opus
Input
$15.00
Output
$75.00
Mercury
Input
$10.00
1.5× cheaper
Output
$10.00
7.5× cheaper
Mercury is cheaper on both: 1.5× input, 7.5× output.
Writing DNA
Style Comparison
Similarity
51%
Mercury uses 405.9x more bold
Claude 3 Opus
Mercury
54%Vocabulary60%
14wSentence Length31w
0.48Hedging0.78
0.0Bold4.1
3.0Lists2.8
0.00Emoji0.03
0.00Headings0.88
0.06Transitions0.06
Based on 3 + 26 text responses
Research
What we learned reading every model
FAQ
Common questions
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