Error: G 5 - 400

[encoderit-salman]

Error Details

Model: GPT 5
Provider: openai
Status Code: 400

Error Output

{
  "message":"Item 'rs_0e2a6688f68ed1c4006948917b62108196b8d8339e47a272ed' of type 'reasoning' was provided without its required following item.",
  "type":"invalid_request_error",
  "param":"input",
  "code":null
}

Additional Context
Thats my model config

  - name: G 5
    provider: openai
    model: gpt-5
    apiKey: ${{ secrets.OPENAI_API_KEY }}
    roles:
      - chat
      - edit
      - apply
    capabilities:
      - tool_use
    defaultCompletionOptions:
      contextLength: 200000
      maxTokens: 4096
      reasoning: true
    useLegacyCompletionsEndpoint: true

[continue]

This appears to be a duplicate or related to the following issues:

• Error: GPT-5 - 400 #9164 - Error: GPT-5 - 400 (organization verification required for reasoning summaries)
• Error: GPT-5 - 400 #9155 - Error: GPT-5 - 400 (tool call ID mismatch)
• Bug: DeepSeek R1 (Reasoner) fails with MCP tools - 400 Missing reasoning_content #9245 - Bug: DeepSeek R1 (Reasoner) fails with MCP tools - 400 Missing reasoning_content
• No Body Error on GPT-5 #8458 - No Body Error on GPT-5

The error in this issue is specifically about GPT-5 with reasoning: true and useLegacyCompletionsEndpoint: true, where the API indicates that a 'reasoning' type item was provided without its required following item.