Jev → Sonnet 5.5 → Opus 5.5: a three-tier cost routing stack
Jev makes typed decisions (choice/score/yes-no, 70-500ms, $0.042 per 1M input tokens), then requests route by difficulty to Sonnet 5.5 or Opus 5.5, escalating only upward on low confidence.
Most teams are burning Opus tokens on decisions a $0.04 model can make Here's the most cost-efficient AI stack right now: Jev → Sonnet 5.5 → Opus 5.5 Jev decides Sonnet 5.5 does the work Opus 5.5 handles the hard stuff How it works: 1. Every request hits Jev first It doesn't write text. It returns typed answers with calibrated probabilities - choice, score, yes/no. 70-500ms. $0.042 per 1M input tokens, output is free 2. Jev routes: easy, hard, spam, or risky? 3. Easy and medium tasks → Sonnet 5.5 $2 / $10 per 1M tokens. Exactly half the price of Opus 4. Hard reasoning, architecture, final review → Opus 5.5 $4 / $20 per 1M tokens, 1M context 5. Low confidence from Jev? Escalate up, never down Anthropic's own launch post says Sonnet 5.5 "complements Opus 5.5 best when running at lower effort settings" So run Sonnet at low/medium effort and save /effort high for Opus Using LLMs as decision engines was the old workflow Decision model + workhorse + frontier reviewer is the next one Bookmark it and set it up this weekend Then read the full setup guide below ↓
This post quotes another post: x.com/solst1ne/status/2101724066369654935