google/gemini-2.0-flash -> 2.5

[fredsa]

Issue Link:

What is the link to the issue this cherry-pick is addressing?

https://github.com/flutter/flutter/issues/< Replace with issue link here >

It's a good idea to open an issue first for discussion.

• All tests pass
• Appropriate inline docstrings changes are included in the PR
• Appropriate documentation changes to the docs site are included in the PR

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the default Gemini model version used throughout the project, including configuration files, CLI initialization templates, and documentation guides, to ensure users are utilizing the latest version.

Highlights

• Model Version Update: Updated the default model reference from google/gemini-2.0-flash to google/gemini-2.5-flash across the codebase and documentation.

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[gemini-code-assist]

Code Review

This pull request replaces the google/gemini-2.0-flash model identifier with google/gemini-2.5-flash in the documentation, example YAML configuration, and CLI initialization code. Review feedback identifies that the 2.5 version is currently invalid and will cause errors, recommending a reversion to the 2.0 version.

[gemini-code-assist]

The model google/gemini-2.5-flash is likely a typo for google/gemini-2.0-flash. Using an incorrect model name in the example configuration will lead to errors for users trying to run the example.

  - google/gemini-2.0-flash