RIP FABLE 5: OpenCode + NEW DeepSeek V4 Pro 0813 Just Built THIS For $0.22

This video goes through the new deepseek-v4-pro-0813 model drop and whether it's good or not - inside DeepSeek just dropped V4 Pro 0813 — and I pointed it at OpenCode to see if it could build a full SaaS app on its own. It did. Total cost: $0.22. Auth, database, Stripe payments, credits, marketing pages and AI image generation — the whole thing, in one run. THE NUMBERS • 18.9M tokens across 168 requests • $0.22 total spend • $0.01 blended per 1M (98.3% cache hit rate) • 191,370 tokens used — 18% of a single context window • $0.435 in / $0.87 out per 1M · 1M context THE STACK OpenCode + DeepSeek V4 Pro 0813 via OpenRouter, building on Convex, Clerk, Stripe and Next.js. On the agentic benchmarks it goes toe to toe with the frontier models — Terminal Bench 87.9, Cybergym 83.3, AutomationBench 31.8 — at a fraction of the price. It still loses on the harder reasoning evals, and I show you exactly where in the video. 🚀 SPONSOR — Harbor SEO Once your app is live it needs content. Harbor crawls your site, finds the keywords and writes the articles — from €29/month. 👉 https://harborseo.ai If you want the cheapest serious coding setup available right now, this is it. #DeepSeek #OpenCode #AICoding Try HarborSEO: https://harborseo.ai Work with us: https://incomestreamsurfer.com Try Bright Data: https://brightdata.com/?promo=incomestreamsurfers