Delphi から LLM を呼び出す

var
  oRequest: TsgcAnthropicClass_Request_Messages;
  oMessage: TsgcAnthropicClass_Request_Message;
  oTool: TsgcAnthropicClass_Request_Tool;
  oMessages: TsgcAnthropicArray_Request_Messages;
  oTools: TsgcAnthropicArray_Request_Tools;
  oResponse: TsgcAnthropicClass_Response_Messages;
  i: Integer;
begin
  oRequest := TsgcAnthropicClass_Request_Messages.Create;
  try
    oRequest.Model := 'claude-sonnet-4-20250514';
    oRequest.MaxTokens := 4096;

    oMessage := TsgcAnthropicClass_Request_Message.Create;
    oMessage.Role := 'user';
    oMessage.Content := 'What is the stock of SKU 8841?';
    SetLength(oMessages, 1);
    oMessages[0] := oMessage;
    oRequest.Messages := oMessages;

    oTool := TsgcAnthropicClass_Request_Tool.Create;
    oTool.Name := 'get_stock';
    oTool.Description := 'Read the on-hand stock for a SKU';
    oTool.InputSchema :=
      '{"type":"object","properties":{"sku":{"type":"string",' +
      '"description":"The product code"}},"required":["sku"]}';
    SetLength(oTools, 1);
    oTools[0] := oTool;
    oRequest.Tools := oTools;

    oResponse := FAnthropic.CreateMessage(oRequest);
    try
      for i := 0 to Length(oResponse.Content) - 1 do
        if oResponse.Content[i].ContentType = 'tool_use' then
          // .Name is the tool, .Input the JSON arguments,
          // .Id the value to echo back as ToolUseId
          RunTool(oResponse.Content[i].Name,
            oResponse.Content[i].Input, oResponse.Content[i].Id)
        else if oResponse.Content[i].ContentType = 'text' then
          memoAnswer.Lines.Add(oResponse.Content[i].Text);
    finally
      oResponse.Free;
    end;
  finally
    sgcFree(oMessage);
    sgcFree(oTool);
    sgcFree(oRequest);
  end;
end;

var
  oRequest: TsgcOpenAIClass_Request_ChatCompletion;
  oResponse: TsgcOpenAIClass_Response_ChatCompletion;
  oSystem, oUser: TsgcOpenAIClass_Request_Completion_Message;
  oMessages: TsgcOpenAIArray_Request_Completion_Messages;
begin
  oRequest := TsgcOpenAIClass_Request_ChatCompletion.Create;
  try
    oRequest.Model := 'gpt-4o';
    oRequest.MaxTokens := 1024;
    oRequest.Temperature := 0.2;

    oSystem := TsgcOpenAIClass_Request_Completion_Message.Create;
    oSystem.Role := 'system';
    oSystem.Content := 'You are a warehouse assistant.';

    oUser := TsgcOpenAIClass_Request_Completion_Message.Create;
    oUser.Role := 'user';
    oUser.Content := 'What is the stock of SKU 8841?';

    SetLength(oMessages, 2);
    oMessages[0] := oSystem;
    oMessages[1] := oUser;
    oRequest.Messages := oMessages;

    // Tool definitions as a JSON array
    oRequest.Tools :=
      '[{"type":"function","function":{"name":"get_stock",' +
      '"description":"Read the on-hand stock for a SKU",' +
      '"parameters":{"type":"object","properties":' +
      '{"sku":{"type":"string"}},"required":["sku"]}}}]';
    oRequest.ToolChoice := 'auto';

    oResponse := FOpenAI.CreateChatCompletion(oRequest);
    try
      if Length(oResponse.Choices) > 0 then
      begin
        memoAnswer.Lines.Text := oResponse.Choices[0]._Message.Content;
        memoTools.Lines.Text := oResponse.Choices[0]._Message.ToolCalls;
        lblStop.Caption := oResponse.Choices[0].FinishReason;
      end;
      lblTokens.Caption := IntToStr(oResponse.Usage.TotalTokens);
    finally
      oResponse.Free;
    end;
  finally
    // frees the attached Messages too
    oRequest.Free;
  end;
end;