token.app › Compare › Gemini 3.1 Pro Preview Custom Tools vs Mercury 3

Gemini 3.1 Pro Preview Custom Tools vs Mercury 3

Mercury 3 is 28× cheaper per token on a blended 3:1 basis. Gemini 3.1 Pro Preview Custom Tools accepts the larger context window (1.0M).

Head to head
Blended price uses a 3:1 input:output mix
Gemini 3.1 Pro Preview Custom ToolsMercury 3
ProviderGoogleInception
Input $/1M$2.00$0.100
Output $/1M$12.00$0.350
Blended $/1M$4.50$0.163
Context window1.0M1M
Max output66K131K
ReleasedFeb 2026Oct 2026
LicenceProprietaryProprietary
Choose Gemini 3.1 Pro Preview Custom Tools if…
  • Larger context window (1.0M)
Choose Mercury 3 if…
  • Costs less per token — $0.163 vs $4.50 blended
  • Newer model (released Oct 2026)
FAQ
Which is better, Gemini 3.1 Pro Preview Custom Tools or Mercury 3?
We do not hold independently-run benchmark scores covering both Gemini 3.1 Pro Preview Custom Tools and Mercury 3, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Gemini 3.1 Pro Preview Custom Tools cheaper than Mercury 3?
Mercury 3 is cheaper: $0.163 versus $4.50 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $0.100. Output alone: $12.00 vs $0.350.
What context windows do Gemini 3.1 Pro Preview Custom Tools and Mercury 3 have?
Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens. Mercury 3: 1,000,000 tokens.
Who makes Gemini 3.1 Pro Preview Custom Tools and Mercury 3?
Gemini 3.1 Pro Preview Custom Tools is made by Google. Mercury 3 is made by Inception.
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