anomalyco / anomalyco/opencode
OpenCode Zen lists GPT 5.6 Terra but cannot run it
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Since Jul 24, 2026.
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Description
Description
opencode/gpt-5.6-terra is listed as an available OpenCode Zen model but fails reproducibly at runtime.
Three consecutive minimal requests failed before any generation started. All returned the same Zen gateway error:
Error: No provider available
HTTP 401
{"type":"error","error":{"type":"ModelError","message":"No provider available"}}
The request reached the documented Responses endpoint:
https://opencode.ai/zen/v1/responses
This is not a local missing-credential issue:
- opencode auth list shows OpenCode Zen api as configured.
- opencode models opencode lists opencode/gpt-5.6-terra.
- Zen documentation lists GPT 5.6 Terra and /zen/v1/responses as its endpoint.
Reproduction
opencode run --model opencode/gpt-5.6-terra "Reply exactly: OK"
Expected: OK
Actual: immediate HTTP 401 with ModelError: No provider available; zero input/output tokens.
Plugins
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OpenCode version
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Steps to reproduce
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Screenshot and/or share link
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Operating System
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Terminal
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Assessment
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