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Google Gemini Pro Latest vs Google: Gemini 3.1 Pro Preview Custom Tools: Complete Comparison 2026

Choosing between Google Gemini Pro Latest and Google: Gemini 3.1 Pro Preview Custom Tools? We compare both tools across features, pricing, pros and cons to help you decide which is the better fit in 2026.

Google Gemini Pro Latest9.2

~google · Video & Audio, Chatbots & LLMs

This model always redirects to the latest model in the Google Gemini Pro family.

Google: Gemini 3.1 Pro Preview Custom Tools9.2

Google · Video & Audio, Chatbots & LLMs

Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...

Key differences at a glance

  • •Both start at $2.00/1M tokens (Google Gemini Pro Latest) and $2.00/1M tokens (Google: Gemini 3.1 Pro Preview Custom Tools).
  • •Context windows differ: Google Gemini Pro Latest offers 1,048,576 tokens, Google: Gemini 3.1 Pro Preview Custom Tools offers 1,048,756 tokens.

Side-by-side comparison

FeatureGoogle Gemini Pro Latest~googleGoogle: Gemini 3.1 Pro Preview Custom ToolsGoogle
Quality score9.2 / 109.2 / 10
Starting price$2.00/1M tokens$2.00/1M tokens
Free tierNoNo
API input price$2 / 1M tokens$2 / 1M tokens
API output price$12 / 1M tokens$12 / 1M tokens
Speed——
Context window1,048,576 tokens1,048,756 tokens
CategoriesVideo & Audio, Chatbots & LLMsVideo & Audio, Chatbots & LLMs
Key features
  • 1,048,576-token context window
  • Vision (image input)
  • Reasoning / chain-of-thought
  • Tool / function calling
  • 1,048,756-token context window
  • Vision (image input)
  • Reasoning / chain-of-thought
  • Tool / function calling
Pros
      Cons

          Google Gemini Pro Latest

          Choose Google Gemini Pro Latest if you want content creation, research and writing.

          Google: Gemini 3.1 Pro Preview Custom Tools

          Choose Google: Gemini 3.1 Pro Preview Custom Tools if you want content creation, research and writing.

          Pricing comparison

          Google Gemini Pro Latest
          $2.00/1M tokens
          API: $2 in / $12 out per 1M tokens
          Google: Gemini 3.1 Pro Preview Custom Tools
          $2.00/1M tokens
          API: $2 in / $12 out per 1M tokens

          The verdict

          Overall, Google Gemini Pro Latest edges ahead with a quality score of 9.2 versus 9.2 for Google: Gemini 3.1 Pro Preview Custom Tools. Choose Google Gemini Pro Latest if you want . That said, Google: Gemini 3.1 Pro Preview Custom Tools is the better pick when matters most — so the right answer depends on your priorities and budget.

          Try Google Gemini Pro Latest →Try Google: Gemini 3.1 Pro Preview Custom Tools →

          Frequently asked questions

          Q. Which is better, Google Gemini Pro Latest or Google: Gemini 3.1 Pro Preview Custom Tools?

          On our scoring, Google Gemini Pro Latest edges ahead (9.2/10), but the right pick depends on your priorities and budget — see the breakdown above.

          Q. Is Google Gemini Pro Latest or Google: Gemini 3.1 Pro Preview Custom Tools cheaper?

          Google Gemini Pro Latest starts at $2.00/1M tokens and Google: Gemini 3.1 Pro Preview Custom Tools at $2.00/1M tokens. Check current rates before committing.

          Q. Can I use Google Gemini Pro Latest and Google: Gemini 3.1 Pro Preview Custom Tools together?

          Yes — many teams use more than one AI tool, picking Google Gemini Pro Latest for some tasks and Google: Gemini 3.1 Pro Preview Custom Tools for others where it's stronger.