feat(core): Add GOOGLE_GENAI_API_VERSION environment variable support by deyim · Pull Request #16177 · google-gemini/gemini-cli

deyim · 2026-01-08T18:45:20Z

Summary

Adds support for GOOGLE_GENAI_API_VERSION environment variable to allow enterprise users with internal API proxies to override the default API version (v1beta1) used by the SDK
This fixes 404 errors when proxies expect different API versions (e.g., v1 instead of v1beta1)

Details

packages/core/src/core/contentGenerator.ts: Read GOOGLE_GENAI_API_VERSION env var and pass it to the GoogleGenAI constructor when set
docs/cli/configuration.md: Added documentation for the new environment variable
packages/core/src/core/contentGenerator.test.ts: Added 3 test cases for the new functionality

Related Issues

Fixes Support custom API version for enterprise proxy endpoints #16173

How to Validate

Unit tests: Run npm run test and verify the 3 new tests incontentGenerator.test.ts pass:

should pass apiVersion to GoogleGenAI when GOOGLE_GENAI_API_VERSION is set
should not include apiVersion when GOOGLE_GENAI_API_VERSION is not set
should pass apiVersion for Vertex AI when GOOGLE_GENAI_API_VERSION is set

Manual testing with v1 API:

export GOOGLE_GENAI_API_VERSION="v1"
export GEMINI_API_KEY="your-api-key"
gemini

Verify requests use /v1/ in the API path instead of /v1beta1/

Manual testing without env var (default behavior):

unset GOOGLE_GENAI_API_VERSION
gemini

Verify the SDK uses its default API version (v1beta1)

Edge case - empty string:

export GOOGLE_GENAI_API_VERSION=""

Verify it behaves the same as unset (uses SDK default)

Pre-Merge Checklist

gemini-code-assist · 2026-01-08T18:45:35Z

Summary of Changes

Hello @deyim, 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 enhances the core functionality by enabling users to explicitly control the Google GenAI API version through a new environment variable, GOOGLE_GENAI_API_VERSION. This change is crucial for improving compatibility, particularly for enterprise environments that utilize internal API proxies requiring specific API versions, thereby preventing potential 404 errors and ensuring smoother integration.

Highlights

API Version Override: Introduced support for the GOOGLE_GENAI_API_VERSION environment variable, allowing users to explicitly specify the desired API version (e.g., v1) for Google GenAI requests, overriding the default v1beta1.
Enterprise Proxy Compatibility: This feature resolves 404 errors encountered by enterprise users whose internal API proxies expect different API versions, ensuring smoother integration and functionality within such environments.
Documentation and Testing: The new environment variable is fully documented in docs/cli/configuration.md and thoroughly tested with three new unit tests in contentGenerator.test.ts to ensure correct behavior across various scenarios, including Vertex AI usage.

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Code Review

This pull request introduces support for the GOOGLE_GENAI_API_VERSION environment variable, allowing users to override the default API version. The changes include updates to the documentation, new unit tests, and the core implementation. The implementation is mostly correct, but I've found an edge case where an empty string for the environment variable is not handled as intended, which could lead to failed API requests. I've provided a suggestion to fix this. The added tests are good, but it would be beneficial to also cover this edge case.

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

bdmorgan · 2026-01-23T22:06:50Z

This pull request is being closed because it is labeled as "🔒 maintainer only".

Issues or pull requests with this label are restricted to project maintainers due to the sensitive or complex nature of the task. We value your desire to contribute! Please consider helping us resolve other open issues, specifically those marked with the help wanted label.

bdmorgan · 2026-01-28T23:48:41Z

I've reviewed and will approve. Can you resolve the merge conflicts in docs/cli/configuration.md?

deyim · 2026-01-29T21:31:54Z

I've reviewed and will approve. Can you resolve the merge conflicts in docs/cli/configuration.md?

Hey @bdmorgan, thanks for taking a look at it. I've updated the docs/get-started/configuration.md file.

bdmorgan · 2026-01-29T22:46:36Z

@deyim thanks again for the pull request! there was one minor build error occurring that I hopefully fixed. If you test the main branch after this PR is in and see any issues, ping this PR and I can reopen. Thanks again!!

…google-gemini#16177) Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Co-authored-by: Bryan Morgan <[email protected]>

rwalle · 2026-04-07T13:31:20Z

This change is not compatible with GOOGLE_GENAI_API_VERSION env var due to a missing change in sandbox.ts. I opened #24828 for the issue.

…#16177) Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Co-authored-by: Bryan Morgan <[email protected]>

…google-gemini#16177) Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Co-authored-by: Bryan Morgan <[email protected]>

Add api version env variable

1b1c0db

deyim requested a review from a team as a code owner January 8, 2026 18:45

Merge branch 'main' into dyim/add-api-version-env-var

dbdab2d

gemini-cli Bot added the area/enterprise Issues related to Telemetry, Policy, Quota / Licensing label Jan 8, 2026

gemini-code-assist Bot reviewed Jan 8, 2026

View reviewed changes

Comment thread packages/core/src/core/contentGenerator.ts Outdated

deyim and others added 2 commits January 8, 2026 10:50

Handle empty string

f97ee84

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Add test for the new string handling

2a9ca55

deyim force-pushed the dyim/add-api-version-env-var branch from f94ee5f to 2a9ca55 Compare January 8, 2026 18:55

Fix style

20631f4

sehoon38 requested a review from a team as a code owner January 21, 2026 04:12

gemini-cli Bot added the priority/p1 Important and should be addressed in the near term. label Jan 22, 2026

jacob314 added the 🔒 maintainer only ⛔ Do not contribute. Internal roadmap item. label Jan 22, 2026

bdmorgan closed this Jan 23, 2026

bdmorgan reopened this Jan 28, 2026

bdmorgan added help wanted We will accept PRs from all issues marked as "help wanted". Thanks for your support! and removed 🔒 maintainer only ⛔ Do not contribute. Internal roadmap item. labels Jan 28, 2026

bdmorgan approved these changes Jan 28, 2026

View reviewed changes

deyim added 2 commits January 29, 2026 13:10

Merge branch 'main' into dyim/add-api-version-env-var

ad6dbe1

Update relevant doc

e51063f

Merge branch 'main' into dyim/add-api-version-env-var

7528d3e

bdmorgan enabled auto-merge January 29, 2026 21:35

bdmorgan added 2 commits January 29, 2026 17:01

fix(a2a-server): restore type assertions for tool confirmation details

3aab404

Merge remote-tracking branch 'origin/main' into pr-16177

ffec5fe

bdmorgan force-pushed the dyim/add-api-version-env-var branch from 7e50328 to ffec5fe Compare January 29, 2026 22:32

bdmorgan added this pull request to the merge queue Jan 29, 2026

Merged via the queue into google-gemini:main with commit fdda3a2 Jan 29, 2026
25 checks passed

rwalle mentioned this pull request Apr 7, 2026

Sandbox does not forward GOOGLE_GENAI_API_VERSION into container #24828

Open

sripasg added the size/m A medium sized PR label Jun 2, 2026

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feat(core): Add GOOGLE_GENAI_API_VERSION environment variable support - #16177

feat(core): Add GOOGLE_GENAI_API_VERSION environment variable support#16177
bdmorgan merged 10 commits into
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deyim:dyim/add-api-version-env-var

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deyim commented Jan 8, 2026

Summary

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