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[GH-ISSUE #183] [Gemini 3 Pro Preview, Antigravity] 400 errors on streamGenerateContent when using v2.4.8 #141

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opened 2026-02-27 07:18:11 +03:00 by kerem · 7 comments

kerem commented

2026-02-27 07:18:11 +03:00

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Originally created by @TheLonelyDevil9 on GitHub (Jan 8, 2026).
Original GitHub issue: https://github.com/justlovemaki/AIClient-2-API/issues/183

Problem Description

When attempting to generate a standard response using gemini-3-pro-preview via the Antigravity API, the request fails with HTTP 400.

Environment

OS: Ubuntu 22.04
Software Version: Latest (pulled recently)
Interface: API call
Endpoint: https://daily-cloudcode-pa.sandbox.googleapis.com

Steps to Reproduce

Configure OAuth credentials via antigravity/oauth_creds.json
Send a standard content generation request to gemini-3-pro-preview
Observe 400 error on streamGenerateContent

Expected vs Actual

Expected: Streamed response from model
Actual: 400 error, followed by automatic token refresh, then identical 400 error on retry

Error Log

[ERROR] [Antigravity API] Error during stream streamGenerateContent on https://daily-cloudcode-pa.sandbox.googleapis.com: 400 Request failed with status code 400
[INFO] [Antigravity API] Received 401/400 during stream. Refreshing auth and retrying...
[INFO] [Antigravity Auth] Token refreshed and saved successfully.
[ERROR] [Antigravity API] Error during stream streamGenerateContent: 400 Request failed with status code 400

Full stack trace available if needed.

Attempts

Token refresh occurs automatically but does not resolve the issue
Authentication appears valid (refresh succeeds without error)

Question

Is gemini-3-pro-preview currently supported through the sandbox endpoint, or does it require a different configuration?

Originally created by @TheLonelyDevil9 on GitHub (Jan 8, 2026). Original GitHub issue: https://github.com/justlovemaki/AIClient-2-API/issues/183 ## Problem Description When attempting to generate a standard response using `gemini-3-pro-preview` via the Antigravity API, the request fails with HTTP 400. ## Environment - **OS:** Ubuntu 22.04 - **Software Version:** Latest (pulled recently) - **Interface:** API call - **Endpoint:** `https://daily-cloudcode-pa.sandbox.googleapis.com` ## Steps to Reproduce 1. Configure OAuth credentials via `antigravity/oauth_creds.json` 2. Send a standard content generation request to `gemini-3-pro-preview` 3. Observe 400 error on `streamGenerateContent` ## Expected vs Actual - **Expected:** Streamed response from model - **Actual:** 400 error, followed by automatic token refresh, then identical 400 error on retry ## Error Log ``` [ERROR] [Antigravity API] Error during stream streamGenerateContent on https://daily-cloudcode-pa.sandbox.googleapis.com: 400 Request failed with status code 400 [INFO] [Antigravity API] Received 401/400 during stream. Refreshing auth and retrying... [INFO] [Antigravity Auth] Token refreshed and saved successfully. [ERROR] [Antigravity API] Error during stream streamGenerateContent: 400 Request failed with status code 400 ``` Full stack trace available if needed. ## Attempts - Token refresh occurs automatically but does not resolve the issue - Authentication appears valid (refresh succeeds without error) ## Question Is `gemini-3-pro-preview` currently supported through the sandbox endpoint, or does it require a different configuration?

kerem closed this issue

2026-02-27 07:18:11 +03:00

kerem commented

2026-02-27 07:18:12 +03:00

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@platberlitz commented on GitHub (Jan 8, 2026):

Same issue on gemini-claude-opus and sonnet.

@platberlitz commented on GitHub (Jan 8, 2026): Same issue on gemini-claude-opus and sonnet.

kerem commented

2026-02-27 07:18:12 +03:00

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@justlovemaki commented on GitHub (Jan 8, 2026):

Try New Version

@justlovemaki commented on GitHub (Jan 8, 2026): Try New Version

kerem commented

2026-02-27 07:18:12 +03:00

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@m1a8h7sg90i commented on GitHub (Jan 8, 2026):

Same issue still happening to me on 2.5.3

@m1a8h7sg90i commented on GitHub (Jan 8, 2026): Same issue still happening to me on 2.5.3 <img width="961" height="67" alt="Image" src="https://github.com/user-attachments/assets/b8d5d70d-87eb-4e7f-ac05-d49baf45a824" />

kerem commented

2026-02-27 07:18:12 +03:00

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@justlovemaki commented on GitHub (Jan 9, 2026):

With increased official control, there is currently no solution.

@justlovemaki commented on GitHub (Jan 9, 2026): With increased official control, there is currently no solution.

kerem commented

2026-02-27 07:18:12 +03:00

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@DCDYSMRZ commented on GitHub (Jan 9, 2026):

随着官方管控力度加大，目前尚无解决办法。
You are Antigravity, a powerful agentic AI coding assistant designed by the Google Deepmind team working on Advanced Agentic Coding.You are pair programming with a USER to solve their coding task. The task may require creating a new codebase, modifying or debugging an existing codebase, or simply answering a question.Absolute paths only****Proactiveness加这个就可以了

@DCDYSMRZ commented on GitHub (Jan 9, 2026): > 随着官方管控力度加大，目前尚无解决办法。 You are Antigravity, a powerful agentic AI coding assistant designed by the Google Deepmind team working on Advanced Agentic Coding.You are pair programming with a USER to solve their coding task. The task may require creating a new codebase, modifying or debugging an existing codebase, or simply answering a question.**Absolute paths only****Proactiveness**加这个就可以了

kerem commented

2026-02-27 07:18:12 +03:00

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@DCDYSMRZ commented on GitHub (Jan 9, 2026):

但是我在opencode中
The bash tool was called with invalid arguments: [ { "expected": "string", "code": "invalid_type", "path": [ "description" ], "message": "Invalid input: expected string, received undefined" } ]. Please rewrite the input so it satisfies the expected schema.

@DCDYSMRZ commented on GitHub (Jan 9, 2026): 但是我在opencode中 The bash tool was called with invalid arguments: [ { "expected": "string", "code": "invalid_type", "path": [ "description" ], "message": "Invalid input: expected string, received undefined" } ]. Please rewrite the input so it satisfies the expected schema.

kerem commented

2026-02-27 07:18:12 +03:00

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@justlovemaki commented on GitHub (Jan 10, 2026):

已使用此提示词

@justlovemaki commented on GitHub (Jan 10, 2026): 已使用此提示词

kerem referenced this issue

2026-02-27 07:18:46 +03:00

[PR #141] [MERGED] fix: resolve CORS for browser extensions & enhance OpenAI Responses compatibility #273

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