token.app › Compare › Gemini 3.1 Pro Preview Custom Tools vs Grok 4.5

Gemini 3.1 Pro Preview Custom Tools vs Grok 4.5

Grok 4.5 is 1.5× 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 ToolsGrok 4.5
ProviderGooglexAI
Input $/1M$2.00$2.00
Output $/1M$12.00$6.00
Blended $/1M$4.50$3.00
Context window1.0M500K
Max output66K—
ReleasedFeb 2026Jul 2026
LicenceProprietaryProprietary
Choose Gemini 3.1 Pro Preview Custom Tools if…
  • Larger context window (1.0M)
Choose Grok 4.5 if…
  • Costs less per token — $3.00 vs $4.50 blended
  • Newer model (released Jul 2026)
FAQ
Which is better, Gemini 3.1 Pro Preview Custom Tools or Grok 4.5?
We do not hold independently-run benchmark scores covering both Gemini 3.1 Pro Preview Custom Tools and Grok 4.5, 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 Grok 4.5?
Grok 4.5 is cheaper: $3.00 versus $4.50 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $2.00. Output alone: $12.00 vs $6.00.
What context windows do Gemini 3.1 Pro Preview Custom Tools and Grok 4.5 have?
Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens. Grok 4.5: 500,000 tokens.
Who makes Gemini 3.1 Pro Preview Custom Tools and Grok 4.5?
Gemini 3.1 Pro Preview Custom Tools is made by Google. Grok 4.5 is made by xAI.
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