Console Go: kimi-k3 and mimo-v2 fail with "Upstream request failed", minimax-m3 works

Description

I have a Go subscription.

Environment:

• SillyTavern (OpenAI compatible)
• Base URL: https://opencode.ai/zen/go/v1
• API key is valid.
• Models list can be fetched successfully.

Issue:

• kimi-k3: fails
• mimo-v2.5: fails
• minimax-m3: works

The request is extremely simple:

messages:

• role: user
  content: "Hi"

Backend log:

Error from provider (Console Go): Upstream request failed

I have already verified:

• Different API keys (same result on my side)
• Different SillyTavern instances (server + Android local)
• Empty chat
• No extra parameters
• Presence/Frequency penalty = 0

Interestingly:
A friend can use my API key with kimi-k3 successfully from another environment.

So the key is valid, but requests from my environment consistently fail for kimi-k3 and mimo-v2.5.

Plugins

No response

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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