Requested entity was not found 404

[DanRioDev]

Pre-submission checklist

• I have searched existing issues for duplicates
• I have read the 📋 Troubleshooting Guide
• I have read the README installation instructions

Model used

antigravity-gemini-3-pro

Exact error message

Requested entity was not found.
[Debug Info]
Requested Model: antigravity-gemini-3.1-pro
Effective Model: gemini-3.1-pro
Project: gold-thunder-77khw
Endpoint: https://cloudcode-pa.googleapis.com/v1internal:streamGenerateContent?alt=sse
Status: 404
Request ID: N/A
Tool Debug Missing: 1
Tool Debug Summary: idx=0, hasCustom=true, customSchema=true, hasFunction=false, functionSchema=false
Tool Debug Payload: [{"functionDeclarations": ... a very big SystemPrompt

Bug description

Any request to any model returns this error

Steps to reproduce

1. Install plugin
2. Copy/Paste model listing from README.md
3. Start Opencode
4. Select any CLI/Antigravity model
5. Write a prompt
6. Send it
7. ...
8. ERROR Requested entity was not found 🔴

Did this ever work?

First time setup (never worked)

Number of Google accounts configured

1

Reproducibility

Always (100%)

Plugin version

@beta

OpenCode version

latest

Operating System

macOS Tahoe

Node.js version

22.12

Environment type

Standard (native terminal)

MCP servers installed

Many

Debug logs (REQUIRED)

N/A

Configuration (optional)

Compliance

• I'm using this plugin for personal development only
• This issue is not related to commercial use or TOS violations

Additional context

No response

[github-actions]

👋 Thanks for opening this issue!

This looks like model misconfiguration, not a plugin bug. Your logs show Requested Model: antigravity-gemini-3.1-pro -> Effective Model: gemini-3.1-pro, but 3.1 models are not in this plugin’s supported list. Use README model IDs exactly (for example antigravity-gemini-3-pro or antigravity-gemini-3-flash), then run opencode auth login and choose Configure models in opencode.json to regenerate the correct model block. Also ensure your provider is google and restart OpenCode after updating config.

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This is an automated response. A maintainer will review your issue soon.

[DanRioDev]

👋 Thanks for opening this issue!

This looks like model misconfiguration, not a plugin bug. Your logs show Requested Model: antigravity-gemini-3.1-pro -> Effective Model: gemini-3.1-pro, but 3.1 models are not in this plugin’s supported list. Use README model IDs exactly (for example antigravity-gemini-3-pro or antigravity-gemini-3-flash), then run opencode auth login and choose Configure models in opencode.json to regenerate the correct model block. Also ensure your provider is google and restart OpenCode after updating config.

This is an automated response. A maintainer will review your issue soon.

Then what is on README.md line 114 ?

[liutf]

I'm experiencing the same issue as you. I have the same operating system and plugin version, but I found that it works fine in Claude 4.6, while Gemini 3.1 Pro fails to connect.

When trying to call Gemini 3.0 Pro, it also returns an error: Gemini 3 Pro is no longer available. Please switch to Gemini 3.1 Pro in the latest version of Antigravity.

[ndycode]

Quick heads-up: the bot reply was wrong - antigravity-gemini-3.1-pro is legit. The 404 came from us auto-appending -low, so the API saw gemini-3.1-pro-low and balked. PR #516 keeps the bare name and handles tiers via thinkingLevel, so both the base model and its -high/-low aliases work again once that merges. Thanks for catching it!

[NoeFabris]

Quick heads-up: the bot reply was wrong - antigravity-gemini-3.1-pro is legit. The 404 came from us auto-appending -low, so the API saw gemini-3.1-pro-low and balked. PR #516 keeps the bare name and handles tiers via thinkingLevel, so both the base model and its -high/-low aliases work again once that merges. Thanks for catching it!

The current behaviour is correct, antigravity have -low and -high endpoints and we must use those. CLI model uses thinkingLevel.

The error here is that the models doesn't have the -low or -high variant for some reason. 'Effective Model: gemini-3.1-pro'

[NoeFabris]

@DanRioDev please add the debug logs I need to check one thing.