{"id":"chatcmpl-CqZevc3EYhaNsSedIFFwr69zHlm0D","object":"chat.completion","created":1766646165,"model":"gpt-4.1-2025-04-14","choices":[{"index":0,"message":{"role":"assistant","content":"The sum \\( 1 + 2 + 3 + 4 + \\ldots + 100 \\) is the sum of the first 100 natural numbers.\n\nThe formula for the sum of the first \\( n \\) natural numbers is:\n\n\\[\nS = \\frac{n(n+1)}{2}\n\\]\n\nFor \\( n = 100 \\):\n\n\\[\nS = \\frac{100 \\times 101}{2} = \\frac{10100}{2} = 5050\n\\]\n\n**Answer:** \n\\[\n1 + 2 + 3 + \\ldots + 100 = \\boxed{5050}\n\\]","refusal":null,"annotations":[]},"logprobs":null,"finish_reason":"stop"}],"usage":{"prompt_tokens":19,"completion_tokens":136,"total_tokens":155,"prompt_tokens_details":{"cached_tokens":0,"audio_tokens":0},"completion_tokens_details":{"reasoning_tokens":0,"audio_tokens":0,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"system_fingerprint":"fp_f99638a8d7"}