fix: updated the Google AI datasource's gemini models with options compatatible with generate command

[tomjose92]

Description

Replace gemini-pro that has been deprecated with 5 models as below

1. gemini-2.5-flash
2. gemini-2.5-pro
3. gemini-2.0-flash
4. gemini-flash-latest
5. gemini-flash-lite-latest

All these models support the generate content command as verified from this List Models API here: https://generativelanguage.googleapis.com/v1beta/models?key=<GOOGLE_API_KEY>

Fixes #41105

Automation

/ok-to-test tags="@tag.All"

🔍 Cypress test results

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Workflow run: https://github.com/appsmithorg/appsmith/actions/runs/19674900186
Commit: 13074e8
Cypress dashboard.
Tags: @tag.All
Spec:

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Tue, 25 Nov 2025 16:44:56 UTC

Communication

Should the DevRel and Marketing teams inform users about this change?

• Yes
• No

Summary by CodeRabbit

• New Features
  • Google AI plugin now supports additional AI models: Gemini 2.5 Pro, Gemini 2.5 Flash, Gemini 2.0 Flash, Gemini Flash Latest, and Gemini Flash Lite Latest, expanding your model selection options.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

Update the GoogleAI plugin to support current Gemini model versions. Replace the deprecated "gemini-pro" model with five new models (gemini-2.5-pro, gemini-2.5-flash, gemini-2.0-flash, gemini-flash-latest, gemini-flash-lite-latest) in the supported models constant and corresponding test cases.

Changes

Cohort / File(s)	Summary
Constants Update app/server/appsmith-plugins/googleAiPlugin/src/main/java/com/external/plugins/constants/GoogleAIConstants.java	GOOGLE_AI_MODELS constant updated from single-entry list containing "gemini-pro" to multi-entry list with five current Gemini model versions.
Test Updates app/server/appsmith-plugins/googleAiPlugin/src/test/java/com/external/plugins/GenerateContentCommandTest.java, app/server/appsmith-plugins/googleAiPlugin/src/test/java/com/external/plugins/GoogleAiPluginTest.java	Model references updated in test data and mock responses from "gemini-pro" to "gemini-2.5-pro"; test assertions adjusted to expect five models instead of one.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

• Straightforward constant value update with no logic changes
• Test updates follow a consistent pattern (model name replacement)
• No control flow or architectural modifications

Poem

🤖 Old models fade to time's forgotten past,
Five shiny Geminis arrive at last!
From pro to flash, a brighter crew,
The Google API gets its overdue fix—hooray for you! ✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The PR successfully addresses issue #41105 by replacing the deprecated gemini-pro model with five supported alternatives that work with generateContent [#41105].
Out of Scope Changes check	✅ Passed	All changes are tightly scoped: updates to constants, corresponding test updates to use new models, and test assertions reflecting the expanded model list—all directly addressing the linked issue.
Title check	✅ Passed	The title accurately reflects the main change: updating Google AI's gemini models list to newer, API-compatible versions that support the generate command.
Description check	✅ Passed	The PR description is well-structured and addresses the template requirements with clear context, issue reference, test results, and automation details.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/issue-41105/update-gemini-models

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[github-actions]

Failed server tests

• com.appsmith.server.helpers.UserUtilsTest#makeInstanceAdministrator_WhenUserAlreadyAdmin_MaintainsPermissionsSuccessfully

[subrata71]

Could you please verify if these two are valid models?

• gemini-flash-latest
• gemini-flash-lite-latest
  Asking this because I didn't find any valid reference for these two models.

[tomjose92]

@subrata71 , yes I had tested for these two models with the API. And also had verified it with this api that Lists all the models along with the commands each supports
https://generativelanguage.googleapis.com/v1beta/models?key=<GOOGLE_API_KEY>

[tomjose92]

Will add this info to the PR description as well for future reference if we want to update these models by checking the latest list

[tomjose92]

/build-deploy-preview skip-tests=true

[github-actions]

Deploying Your Preview: https://github.com/appsmithorg/appsmith/actions/runs/19686400000.
Workflow: On demand build Docker image and deploy preview.
skip-tests: true.
env: ``.
PR: 41415.
recreate: .

[github-actions]

Deploy-Preview-URL: https://ce-41415.dp.appsmith.com