Agentic coding at Cerebras speed, with every hard step routed to the right model and the answer QC-verified before it lands in your repo. Same $20 you'd pay Cursor or Claude — but built on the Lumen router, so you get frontier quality without frontier latency or frontier bills.
Cursor and Claude Code send every token to one premium model. Lumen Build classifies each step's difficulty, routes the easy 80% to fast free/cheap tiers (Cerebras/Groq), reserves the frontier model for the hard 20%, and has a reviewer model verify the result before applying it — so you pay less, wait less, and ship fewer wrong diffs.
Routine edits stream at wafer-scale token rates — the fast lane most coding agents can't touch.
A reviewer model checks the candidate change (ACCEPT / rerun-higher / revise) before it's written — fewer hallucinated edits.
Difficulty-routing means you're not paying Opus prices for boilerplate — the savings fund the reviewer pass.
Anchored at the category's $20 price point — you switch for the speed and the QC, not a price gimmick.
| Tier | Lumen Build | Cursor | Claude Code | Grok | GitHub Copilot |
|---|---|---|---|---|---|
| Free | ✓ | ✓ | · | · | ✓ |
| Entry paid | $20 | $20 Pro | $17–20 Pro | API usage | $10 Pro |
| Power | $60 | $60 Pro+ / $200 Ultra | $100–200 Max | $299 Heavy | $39 Pro+ |
| Team / seat | $40 | $40 | $20–100 | — | $19–39 |
| Cerebras-fast lane | ✓ | · | · | ~ | · |
| Inline QC-verified diffs | ✓ | · | · | · | · |
Recommended structure: parity $20 entry (do not 2× the leader on an unproven coding tool — the "2×-the-leader" doctrine is for the metered Lumen router API, not this seat-priced Build product), differentiate on Cerebras speed + QC-verified diffs + router cost economics. Competitor figures July 2026: Cursor Free/$20/$60/$200 + Teams $40; Claude Code $17–20 Pro / $100–200 Max / Team $20–100 seat; xAI SuperGrok Heavy $299; GitHub Copilot Free/$10/$39 + Business $19 / Enterprise $39 seat.