現在打開社群,動不動就看到有人分享「Claude 員工用的多蝦趴」、「開了一人公司後如何讓 AI 員工 24 小時不間斷工作」的文章。
懂的人會說這樣很燒錢,也有人跳出來說這背後根本是開課程收學費的詐騙。 但「到底燒在哪裡」這件事,沒實際碰過的人可能不清楚。今天就借自己的案例,把這筆帳估給你們看。
事情是這樣:我最近上線了一個簡易預約系統,想找曝光機會。參考 AI 的建議後,把目標鎖定在 Reddit 的幾個版,最後判斷 r/SomebodyMakeThis 是最有可能出現目標受眾的地方。 於是我請 AI 幫我寫了三支程式:
- 程式一:爬蟲,把近一週發布的主題和內容抓回來存到資料庫
- 程式二:逐筆把資料餵給 AI,分析內容關鍵字,判斷需求是否跟預約系統相關,或推測發文者可能需要預約系統,有的話就在資料庫標記
- 程式三:UI 介面,讓我可以快速瀏覽處理結果
程式二在餵資料給 AI 的時候,除了文章主題和內容之外,還得寫一段 prompt,告訴 AI 要用什麼角色、依據什麼邏輯推論、做出哪些判斷,以及最後用 JSON 格式回傳結果。
提示工程(prompt Engineering):老實說我覺得這東西是最沒用的,但是在生成式AI中…你懂的,他不可或缺,不用精通,但懂一點技巧差很多。
「請 AI 分析」 這一步,就是燒錢的地方。 所以我先用自己的機器跑跑看,順便做了一下各模型的比較(處理速度以總 token ÷ 花費時間計算):
- qwen3:8b:準確率沒有達標,有誤判;速度蠻穩定;但請他說明「為何不符合」的原因,很多時候直接失敗。
- gemma3:12b:準確率較高,qwen3 誤判的部分他能正確辨識;速度有時反而更快;說明原因的成功率也高很多。
- gemma3:1b:隨手挑來測的,速度超快;判斷幾乎全錯;但最厲害的是——每一篇誤判都能給你一個講得頭頭是道的理由。
以 qwen3 的表現為基準,大約處理 750 token 需要 18 秒。假設跑滿 24 小時:
每天可處理:86,400 ÷ 18 = 4,800 次
相當於:750 × 4,800 = 3,600,000 tokens/天
如果改成呼叫付費 API
以 Gemini 2.5 Flash 為例:
- 輸入 $0.30 / 百萬 tokens
- 輸出 $2.50 / 百萬 tokens
先不拆算、統一用輸出價格估:3.6 × $2.5 = 每天約 $9 USD,光是這一個功能,而且還只是一個很單純、程式化的分析任務。如果是真的 24 小時不間斷、同時跑多個任務、一直在呼叫 AI 的一人公司——你覺得一個月要燒掉多少錢?
沒錢燒的我,繼續跑本地端。
其實後來我為了力求精準將 token 分拆了輸入跟輸出來計算價格,讓費用漂亮了許多
在精算的狀態下跑八分鐘大概花了 $0.003026 USD
以這個效率換算一天大概花 ((24 x 60) / 8) x $0.003026 = 0.54468 USD
看起來不是花太多錢,但這個前提是因為我在程式裡面已經強制要求 AI 以 JSON 格式回覆,並且回覆原因時也限制最大 300 token,你所用的龍蝦可不會幫你做這些限制。
=== Demand Scanner 分析 ===
時間:2026-03-23 23:50:51
初篩模式:關閉 (全交由 AI 判斷)
待分析總數:51
關鍵字初篩排除:0 篇
需 AI 分析:51 篇
----------------------------------------
[1/51] 分析:Built 60+ SaaS products and still haven't found th... ✗ Not_Suitable (耗時: 7.4s, Tokens: 310↑ 86↓ ($0.000049))
[2/51] 分析:New Crosspost Achievements Concept... ✗ Not_Suitable (耗時: 5.1s, Tokens: 290↑ 60↓ ($0.000040))
[3/51] 分析:Microphone on a small handheld device that voice c... ✗ Not_Suitable (耗時: 8.8s, Tokens: 449↑ 94↓ ($0.000062))
[4/51] 分析:I built it: A 100% free and simple Bingo Card Make... ✗ Not_Suitable (耗時: 7.3s, Tokens: 538↑ 67↓ ($0.000060))
[5/51] 分析:I built it: A 100% free and simple Bingo Card Make... ✗ Not_Suitable (耗時: 5.7s, Tokens: 303↑ 69↓ ($0.000043))
[6/51] 分析:Made a little interactive pre-trip storybook for m... ✗ Not_Suitable (耗時: 9.7s, Tokens: 548↑ 96↓ ($0.000070))
[7/51] 分析:Would something like this help you?... ✗ Not_Suitable (耗時: 6.4s, Tokens: 393↑ 69↓ ($0.000050))
[8/51] 分析:Building for the community.Please fill the form... ✗ Not_Suitable (耗時: 6.2s, Tokens: 336↑ 72↓ ($0.000047))
[9/51] 分析:A "dating" app where you can post an event you are... ✗ Not_Suitable (耗時: 8.1s, Tokens: 500↑ 81↓ ($0.000062))
[10/51] 分析:the W I D E bike... ✗ Not_Suitable (耗時: 6.3s, Tokens: 301↑ 76↓ ($0.000045))
[11/51] 分析:Would you find value in an Adroind/iOS app that ca... ✗ Not_Suitable (耗時: 11.8s, Tokens: 697↑ 108↓ ($0.000085))
[12/51] 分析:where do you guys find like-minded friends and bus... ✗ Not_Suitable (耗時: 9.9s, Tokens: 553↑ 98↓ ($0.000071))
[13/51] 分析:Looking for investors & sellers — we’re buildi... ✗ Not_Suitable (耗時: 10.7s, Tokens: 521↑ 111↓ ($0.000072))
[14/51] 分析:[For Hire] I make things/Product Manager & Des... ✗ Not_Suitable (耗時: 9.8s, Tokens: 650↑ 88↓ ($0.000075))
[15/51] 分析:[For Hire] I build websites, AI tools & digita... ✗ Not_Suitable (耗時: 12.7s, Tokens: 826↑ 105↓ ($0.000093))
[16/51] 分析:[FOR HIRE] Python developer – Telegram bots, scrap... ✗ Not_Suitable (耗時: 8.5s, Tokens: 496↑ 85↓ ($0.000063))
[17/51] 分析:hairspray/deodorant casing for pepperspray... ✗ Not_Suitable (耗時: 7.3s, Tokens: 318↑ 86↓ ($0.000050))
[18/51] 分析:website idea... ✗ Not_Suitable (耗時: 8.4s, Tokens: 372↑ 96↓ ($0.000057))
[19/51] 分析:Is there a demand for a smarter Apple Music ↔ Spot... ✗ Not_Suitable (耗時: 10.0s, Tokens: 713↑ 82↓ ($0.000078))
[20/51] 分析:I built a personal finance desktop app to track my... ✗ Not_Suitable (耗時: 7.5s, Tokens: 309↑ 88↓ ($0.000050))
[21/51] 分析:Could Security Settings Be Hurting Website Visibil... ✗ Not_Suitable (耗時: 10.8s, Tokens: 476↑ 113↓ ($0.000070))
[22/51] 分析:Touch to key mapper... ✗ Not_Suitable (耗時: 8.4s, Tokens: 378↑ 94↓ ($0.000057))
[23/51] 分析:"Brick" — An app that lets you visualize your grow... ✗ Not_Suitable (耗時: 13.0s, Tokens: 997↑ 91↓ ($0.000102))
[24/51] 分析:Creating something that churns leads for multiple ... ✗ Not_Suitable (耗時: 10.0s, Tokens: 381↑ 91↓ ($0.000056))
[25/51] 分析:What would you wish for?... ✗ Not_Suitable (耗時: 6.2s, Tokens: 323↑ 71↓ ($0.000046))
[26/51] 分析:Im building a dating space focused on taste instea... ✗ Not_Suitable (耗時: 10.1s, Tokens: 531↑ 102↓ ($0.000070))
[27/51] 分析:Photography... ✓ Suitable (耗時: 9.1s, Tokens: 347↑ 106↓ ($0.000058))
[28/51] 分析:👋 Welcome to r/Agent_This — Your boring work is so... ✗ Not_Suitable (耗時: 6.0s, Tokens: 307↑ 71↓ ($0.000044))
[29/51] 分析:Headphones often break at the hinge — what if it w... ✗ Not_Suitable (耗時: 7.5s, Tokens: 298↑ 91↓ ($0.000050))
[30/51] 分析:A platform where small groups combine knowledge fr... ✗ Not_Suitable (耗時: 10.3s, Tokens: 585↑ 99↓ ($0.000074))
[31/51] 分析:App or website that aggregates all yoga classes fo... ✓ Suitable (耗時: 10.4s, Tokens: 318↑ 126↓ ($0.000062))
[32/51] 分析:computer/ directory... ✗ Not_Suitable (耗時: 8.9s, Tokens: 393↑ 99↓ ($0.000059))
[33/51] 分析:Planning to start new snack brand... ✗ Not_Suitable (耗時: 5.1s, Tokens: 290↑ 60↓ ($0.000040))
[34/51] 分析:A web app that estimates how much money advertiser... ✗ Not_Suitable (耗時: 7.8s, Tokens: 457↑ 79↓ ($0.000058))
[35/51] 分析:The most underrated automation opportunity: compan... ✗ Not_Suitable (耗時: 7.6s, Tokens: 310↑ 90↓ ($0.000050))
[36/51] 分析:A marketplace website where you can rent out, and ... ✗ Not_Suitable (耗時: 8.3s, Tokens: 432↑ 89↓ ($0.000059))
[37/51] 分析:Productivity tool for ADHD folks... ✗ Not_Suitable (耗時: 8.8s, Tokens: 341↑ 102↓ ($0.000056))
[38/51] 分析:Fusion data api (similar to astropy/gaia etc)for f... ✗ Not_Suitable (耗時: 7.5s, Tokens: 394↑ 82↓ ($0.000054))
[39/51] 分析:Community app... ✗ Not_Suitable (耗時: 7.6s, Tokens: 334↑ 89↓ ($0.000052))
[40/51] 分析:A website where you get an attractive person to ex... ✗ Not_Suitable (耗時: 8.1s, Tokens: 465↑ 83↓ ($0.000060))
[41/51] 分析:How would I go about recreating a dead game?... ✗ Not_Suitable (耗時: 6.5s, Tokens: 412↑ 66↓ ($0.000051))
[42/51] 分析:I made a "guitar hero" for learning piano... ✗ Not_Suitable (耗時: 10.2s, Tokens: 547↑ 101↓ ($0.000071))
[43/51] 分析:A website similar to Etsy, where you can order pro... ✗ Not_Suitable (耗時: 9.8s, Tokens: 443↑ 104↓ ($0.000064))
[44/51] 分析:Looking for an independent full stack developer to... ✗ Not_Suitable (耗時: 12.5s, Tokens: 636↑ 120↓ ($0.000084))
[45/51] 分析:Automated Training Calendars... ✗ Not_Suitable (耗時: 9.0s, Tokens: 449↑ 95↓ ($0.000062))
[46/51] 分析:Want Feedback Not a Promotion... ✗ Not_Suitable (耗時: 8.1s, Tokens: 598↑ 68↓ ($0.000065))
[47/51] 分析:Someone should make Aggr.trade but show NASDAQ cha... ✗ Not_Suitable (耗時: 6.8s, Tokens: 296↑ 82↓ ($0.000047))
[48/51] 分析:A robot that waters your plants for you... ✗ Not_Suitable (耗時: 7.8s, Tokens: 363↑ 88↓ ($0.000054))
[49/51] 分析:Been using ChatGPT to research used cars and hones... ✗ Not_Suitable (耗時: 7.0s, Tokens: 310↑ 81↓ ($0.000048))
[50/51] 分析:New Karma Achievements Concept... ✗ Not_Suitable (耗時: 5.2s, Tokens: 288↑ 61↓ ($0.000040))
[51/51] 分析:New Downvote Achievements Concept... ✗ Not_Suitable (耗時: 6.2s, Tokens: 289↑ 74↓ ($0.000044))
----------------------------------------
結果:Suitable 2 / Uncertain 0 / Not_Suitable 49
本次 API 費用估算: $0.003026 USD
=== 分析完成 ===
