Error from provider (Console): Upstream request failed: Endpoint is unavailable on Ox Alpha Free Unlimited

Description

Description

**Ox Alpha Free Unlimited** consistently fails with:

**Error from provider (Console): Upstream request failed: Endpoint is unavailable.**

Other models work normally.

Steps to reproduce
Select Ox Alpha Free Unlimited.
Send any prompt.
The request fails with Endpoint is unavailable.
Expected behavior

The model should process the request and return a response.

Actual behavior

The request fails with:

**Upstream request failed: Endpoint is unavailable.**
Environment
Model: Ox Alpha Free Unlimited
Other models: Working normally
Provider: OpenCode
Issue appears to affect only this model.
Additional context

This does not appear to be a general OpenCode connectivity issue because other models are working normally.

Version : 1.18.23

### Plugins

Nothing

### OpenCode version

1.18.23

### Steps to reproduce

1. Select `Ox Alpha Free Unlimited` as the active model.
2. Send a normal prompt.
3. The provider request fails with `Upstream request failed: Endpoint is unavailable`.
4. Repeat the request with another model; other models work normally.

### Screenshot and/or share link

<img width="1383" height="570" alt="Image" src="https://github.com/user-attachments/assets/2d6db37e-4800-4afc-beb0-4bcf8822757e" />

### Operating System

Windows 10 Pro 22H2 (Build 19045, 64-bit)

### Terminal

N/A — using the OpenCode Desktop App

The issue names no source file or test. Start by reproducing the failure in the OpenCode Desktop App with Ox Alpha Free Unlimited, then repeat the same prompt with another model for comparison. Done means the affected model request succeeds or the endpoint failure is handled appropriately; inspect the provider request path and add a regression test if the repository has coverage for it.