ChatClient returns 401 Invalid API Key when using Groq as OpenAI-compatible provider

[aminsource]

Bug description
I'm trying to use [Groq](https://groq.com) as an OpenAI-compatible provider with Spring AI (spring.ai.openai) in version 1.0.0. I have correctly configured the api-key and base-url. The same API key works as expected using curl, but Spring AI consistently returns a 401 - Invalid API Key when invoking ChatClient.

---

Environment

• Spring AI version: 1.0.0
• Spring Boot version: 3.2.5
• Java version: 17
• Model: llama3-70b-8192
• Groq base URL: https://api.groq.com/openai
• API key format: gsk_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (valid and confirmed via curl)
• No vector store is used

---

Steps to reproduce

1. Configure application.yml as below:

   spring:
     ai:
       openai:
         api-key: gsk_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
         base-url: https://api.groq.com/openai
         chat:
           options:
             model: llama3-70b-8192
             temperature: 0.7

2. Inject and use ChatClient:

   @Autowired
   private ChatClient chatClient;
   
   public String callGroq(String prompt) {
       return chatClient.prompt()
               .system("You are a helpful assistant.")
               .user(prompt)
               .call()
               .content();
   }

3. Call the method.

---

Expected behavior
A valid chat completion response from Groq, the same as received when making the request via curl.

---

Minimal Complete Reproducible example

Here’s the curl that works:

curl https://api.groq.com/openai/v1/chat/completions -s \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer gsk_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
  -d '{
    "model": "llama3-70b-8192",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

This returns a valid response.

But with Spring AI, I receive this:

401 - {
  "error": {
    "message": "Invalid API Key",
    "type": "invalid_request_error",
    "code": "invalid_api_key"
  }
}

Please advise if any custom headers or additional configuration is required to support Groq in Spring AI.

---

Let me know if you'd like to include a GitHub repo or sample project link as well to improve reproducibility.

[KevinYe0725]

Try adding the version number /v1/ to the URL part of application.yml .