[Bug] Error from provider (Console Go): Upstream request failed — Kimi K3

Description

Kimi K3 model appears in the model selection list but throws "Error from provider (Console Go): Upstream request failed" when selected.

This error only happens with Kimi K3 — other models on Console Go work fine.

Key details:

The model is listed and selectable, but fails on any request
OpenCode Go limits are within normal range (~40% weekly, ~60% monthly) — not a quota issue
Config files are clean: no custom top_p, temperature, or other parameter overrides in any config or agent files
No top_p:0 found anywhere (unlike Error from provider (Console Go): Upstream request failed #37231 which was caused by that)
Other Console Go models (e.g. deepseek-v4-flash) work without issues
Changing API key does not help

OpenCode version

1.18.3

OS

Windows

Steps to reproduce

Open a new session
Select Kimi K3 from the model picker
Send any message
Receive: "Error from provider (Console Go): Upstream request failed"
[...]
Switch to another model (e.g. deepseek-v4-flash) — works normally

OpenCode Go: kimi-k3, kimi-k2.6, kimi-k2.7-code, glm-5.2, grok-4.5, qwen3.7-max, hy3-preview all fail with 'Upstream request failed' — non-standard 'mcp'/'system' fields rejected by strict provider validators #37771: Multiple Console Go models including Kimi K3 all fail with 'Upstream request failed' — covers the same symptom and appears to be the same root cause
opencode-go (Console Go) provider returns 400/401/500 for subscribed models #37056: Console Go provider returning errors for subscribed models
Error from provider (Console Go): Upstream request failed #37231: Same error message ('Error from provider (Console Go): Upstream request failed') — now closed

If your issue is already tracked in one of these, please add any additional context there rather than keeping a separate report.

Any solutions for this yet?

Same here in the VSCode Copilot.

      {
        "id": "kimi-k3",
        "name": "Kimi K3",
        "url": "https://opencode.ai/zen/go/v1/chat/completions",
        "toolCalling": true,
        "vision": true,
        "maxInputTokens": 1048576,
        "maxOutputTokens": 16384,
        "modelOptions": {
          "temperature": 0,
          "top_p": 0
        }
      },

I have this error for one of 3 Kimi K3 sessions, started in the middle of the work at 39% context. And reverting just the last turn resolved it. I wish I could see the details of the error message somewhere in opencode.

I can reproduce this with a newly reset OpenCode Go plan, so this does not appear to be exhausted account quota or a client temperature override.

I tested the Go endpoint directly using the same API key and a minimal payload:

kimi-k3, temperature omitted: HTTP 429 — Provider rate limit exceeded
kimi-k3, temperature: 1: HTTP 429 — Provider rate limit exceeded
kimi-k2.7-code, temperature omitted: HTTP 200
mimo-v2.5, temperature omitted: HTTP 200

The Kimi K3 requests did not include OpenCode-specific mcp or top-level system fields. Changing the Go API key also did not resolve it. This points to a stale or incorrect model-specific Kimi K3 rate-limit bucket/routing state on Console Go. The generic Upstream request failed message appears alongside or after the K3-specific 429 responses.

It seems to be an issue with content review on the OpenCode proxy. I’ve found that this error occurs whenever a request mentions Chinese leaders or contains political language. On my end, this only happens with Kimi models provided through OpenCode Go.

Going to commands (ctrl+p) and changing a model to Mimo V2.5 Free worked for me (at least for now)

i have this issue with deepseek models too but not politica mention at all

facing similar issue with muse spark 1.3 with opencode go subscription.

Same issue with Luna

For me it was an issue because of the long tool name in one of my MCPs. The Responses API used by Muse Spark enforces name ≤ 64 chars. One of my MCP tool name is exactly 65 char. So i disabled it and it worked.

i have same issues with that. i using model Muse Spark 1.3. i think the error because of overlimit session opencode. because when i try to restart the session, it work again

Thanks for the report! OpenCode 2.0 is now out and development is focused on V2, so we're closing issues filed against OpenCode 1. Please upgrade (opencode upgrade --major, details: https://anoma.ly/notes/opencode-2-0), and if this is still relevant on 2.0, reopen this issue or open a new one with your 2.0 version.

— from 𝕺𝖕𝖊𝖓𝕮𝖔𝖉𝖊

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[Bug] Error from provider (Console Go): Upstream request failed — Kimi K3 #37815

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[Bug] Error from provider (Console Go): Upstream request failed — Kimi K3 #37815

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