token.app › Compare › Gemini 3.1 Pro Preview Custom Tools vs Claude Opus 5

Gemini 3.1 Pro Preview Custom Tools vs Claude Opus 5

Gemini 3.1 Pro Preview Custom Tools is 2.2× 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 ToolsClaude Opus 5
ProviderGoogleAnthropic
Input $/1M$2.00$5.00
Output $/1M$12.00$25.00
Blended $/1M$4.50$10.00
Context window1.0M1M
Max output66K128K
ReleasedFeb 2026Jul 2026
LicenceProprietaryProprietary
Choose Gemini 3.1 Pro Preview Custom Tools if…
  • Costs less per token — $4.50 vs $10.00 blended
  • Larger context window (1.0M)
Choose Claude Opus 5 if…
  • Newer model (released Jul 2026)
FAQ
Which is better, Gemini 3.1 Pro Preview Custom Tools or Claude Opus 5?
We do not hold independently-run benchmark scores covering both Gemini 3.1 Pro Preview Custom Tools and Claude Opus 5, 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 Claude Opus 5?
Gemini 3.1 Pro Preview Custom Tools is cheaper: $4.50 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $5.00. Output alone: $12.00 vs $25.00.
What context windows do Gemini 3.1 Pro Preview Custom Tools and Claude Opus 5 have?
Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens. Claude Opus 5: 1,000,000 tokens.
Who makes Gemini 3.1 Pro Preview Custom Tools and Claude Opus 5?
Gemini 3.1 Pro Preview Custom Tools is made by Google. Claude Opus 5 is made by Anthropic.
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