Why We Switched to BYOK for AI Coding — Cut 78% Off Our Token Bill

TL;DR: Flat-rate IDE subscriptions ($20-200/mo) hide per-token reality. BYOK with OpenRouter + Cline gives us model routing per task, full cost visibility, and ~$27/mo for two devs vs $200+ for Cursor Ultra. Full comparison →

The Context

Two-person team shipping a B2B SaaS (React/Node/Postgres). Tried Cursor Pro ($20), hit silent throttling. Evaluated Cursor Ultra ($200) — overkill. Calculated: we spend ~80% of tokens on bulk refactors (renaming, type fixes, test boilerplate) that don’t need Sonnet 3.5. Flat pricing forces subsidizing cheap work with expensive model access.

What We Tested

Tool	Use Case	Verdict	Why
Cursor Pro	Daily coding	❌	Undisclosed limits, throttles mid-refactor
Cursor Ultra	Unlimited fast requests	❌	$200/mo for 20% of our actual workload
Cline + OpenRouter (BYOK)	All coding tasks	✅	Route per task, pay-per-token, model switching
Windsurf + Cascade	Multi-agent flows	✅	$15 flat, documented limits, good for parallel work
Continue.dev (local)	Offline/privacy	⚠️	Local models weak on complex TS/React

The Pivot Point

Analyzed 30 days of Cursor usage: 68% of requests were <500 tokens (imports, types, simple edits). 22% were 500-2000 tokens (component changes). Only 10% were >2000 tokens (architecture, multi-file refactors). Paying Sonnet 3.5 rates for the 68% was waste. Switched to Cline + OpenRouter: Haiku for <500 tokens ($0.25/M), Sonnet 3.5 for >2000 ($3/M input), DeepSeek V3 for bulk refactors ($0.14/M). May bill: $23.40 total.

What We Use Now

Cline (free, VS Code extension) + OpenRouter as primary. Config: .clinerules routes by task type — architecture → anthropic/claude-3.5-sonnet, refactor → deepseek/deepseek-chat-v3, quickfix → anthropic/claude-3.5-haiku, testgen → openai/gpt-4o-mini. Windsurf ($15/mo) for Cascade when we need parallel front-end/back-end agents. Cursor ($20/mo) kept only for tab autocomplete (disabled chat/agent).

When You’d Choose Differently

• Teams avoiding vendor proliferation: Single Cursor Business invoice simpler than OpenRouter + multiple model bills
• Compliance-locked environments: Can’t route data through OpenRouter proxy
• Predictable high-volume Sonnet usage: If >80% of work needs top-tier reasoning, flat Ultra may win

Tool Crucible Rating

Overall	Ease	Value	Support
⭐⭐⭐⭐⭐	⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐⭐

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This is part of our AI Coding Assistant evaluation series. See full comparison: BYOK AI Coding Setup 2026