API Error: 400 All target providers failed

Author: mIcHyAmRaNeCreated Aug 12, 2026Updated Sep 12, 2026

Hello,

with free claude code, cc-switch ... or even configuring manually nvidia/nemotron-3-ultra-550b-a55b for claude code works

but when i setup it with ccr it doesn't we get an error:

json

{
  "error": {
    "message": "All target providers failed.",
    "target_providers": ["openai"],
    "target_provider_names": ["nvidia::openai_chat_completions"],
    "attempts": [
      {
        "provider": "openai",
        "provider_name": "nvidia::openai_chat_completions",
        "stage": "model_resolution",
        "message": "Model \"nemotron-3-ultra-550b-a55b\" is not configured for target provider nvidia::openai_chat_completions. Allowed models: nvidia/nemotron-3-ultra-550b-a55b, thinkingmachines/inkling.",
        "status": 400
      }
    ]
  }
}

note that thinkingmachines/inkling works ,

seems like the problem is the model name used by the router nemotron-3-ultra-550b-a55b instead of: nvidia/nemotron-3-ultra-550b-a55b ?

in claude code:

/model 
22. NVIDIA/nemotron-3-ultra-550b-a55b ✔                    From gateway
23. NVIDIA/Inkling (1M context)                          From gateway

Source: musistudio/claude-code-router

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