anomalyco / anomalyco/opencode
Intermittent "Upstream request failed: Endpoint is unavailable." on free models (x-preview-f-free, muse-spark-1.2-contributor-free)
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@fwang is already working on this.
Since Aug 25, 2026.
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Description
Description
Free models on OpenCode Zen fail intermittently with:
"Error from provider (Console): Upstream request failed: Endpoint is unavailable."
Affected models I tested:
- x-preview-f-free (Ox Alpha Free)
- muse-spark-1.2-free
The request fails with a retry countdown, then succeeds after 2–5 automatic
retries. This repeats several times per session. Other users report the same
in #42750, #43102, #45020, #45073.
Plugins
None
OpenCode version
V1.18.23
Steps to reproduce
- Start opencode normally (default setup, no custom config)
- Select model
opencode/x-preview-f-free(same happens with
muse-spark-1.2-contributor-free) - Send any prompt
- Error appears with retry countdown, then succeeds after a few retries
- Repeat prompts — the error keeps appearing intermittently
Screenshot and/or share link
No response
Operating System
Windows 11
Terminal
PowerShell
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.