透過 API 呼叫 GPT-5

GPT-5 已經公開了，所以我用 PowerShell 試著呼叫它的 API。

程式碼

$uri = "https://api.openai.com/v1/chat/completions"
$headers = @{
    "Authorization" = "Bearer $env:OPENAI_API_KEY"
    "Content-Type"  = "application/json"
}

$body = @{
    model = "gpt-5"
    messages = @(
        @{
            role = "user"
            content = "筆記本和鉛筆合計是100元。鉛筆比筆記本便宜40元。鉛筆多少錢？"
        }
    )
} | ConvertTo-Json -Depth 2

$response = Invoke-RestMethod -Uri $uri -Method Post -Headers $headers -Body $body

foreach($choice in $response.choices){
    $choice.message.content
}

輸出結果

30元

理由:
- 設筆記本為 x 元、鉛筆為 y 元，則
  - x + y = 100
  - y = x - 40
- 代入得 2x - 40 = 100 → x = 70 → y = 30
- 驗算: 70 + 30 = 100，且鉛筆比筆記本便宜 40 元。