BYOK vs Markup Pricing: Why Bringing Your Own Keys Matters

Understand the economics of AI proxy pricing models. Why BYOK saves you money and gives you control. Includes cost comparison calculators.

When choosing an LLM proxy or AI gateway, pricing model matters just as much as features. Get this wrong, and you could be paying 2-3x more than necessary.

This guide breaks down the two dominant pricing models—**BYOK (Bring Your Own Key)** and **Markup Pricing**—and shows you which one makes sense for your business.

What is BYOK?

**BYOK (Bring Your Own Key)** means you provide your own API keys from LLM providers (OpenAI, Anthropic, etc.) and the platform charges a flat fee for the proxy/gateway service.

How BYOK Works

1. You sign up with OpenAI directly
2. You get your own API key
3. You add that key to the proxy platform
4. Platform proxies requests using YOUR key
5. OpenAI bills YOU directly for usage
6. Platform charges YOU a flat monthly fee

BYOK Pricing Example

OpenAI billing (direct to you):
- 1M tokens @ GPT-4 Turbo: $40.00

Platform fee (ReForge LLM):
- Flat monthly fee: $99/month
- No markup on tokens

Total monthly cost (1M tokens/month):
- $40 (OpenAI) + $99 (platform) = $139

What is Markup Pricing?

**Markup Pricing** means the platform provides API keys and marks up the token prices 20-50% above provider costs.

How Markup Works

1. You sign up with the proxy platform
2. Platform gives you THEIR API key
3. You don't have OpenAI account
4. Platform bills you for usage + markup
5. Platform pays OpenAI wholesale
6. Platform keeps the margin

Markup Pricing Example

OpenAI wholesale cost:
- 1M tokens @ GPT-4 Turbo: $40.00

Platform markup (30% typical):
- Your price: $52.00

Total monthly cost (1M tokens/month):
- $52 (all-in platform billing)

Cost Comparison

At Different Usage Levels

|---------------|------------|-------------------|------------|--------|

| 1M tokens | $139 | $52 | +$87 | Markup |

| 5M tokens | $299 | $260 | +$39 | Markup |

| 10M tokens | $499 | $520 | -$21 | BYOK |

| 50M tokens | $2,099 | $2,600 | -$501 | BYOK |

| 100M tokens | $4,099 | $5,200 | -$1,101 | BYOK |

| 500M tokens | $20,099 | $26,000 | -$5,901 | **BYOK** |

**Breakeven point**: ~7-8M tokens/month

Real-World Scenario

**SaaS company with 100K daily requests**:

10M tokens/day

300M tokens/month

GPT-4 Turbo cost: $12,000/month

**BYOK pricing**:

OpenAI: $12,000

Platform: $499

**Total: $12,499/month**

**Markup pricing (30%)**:

All-in: $15,600/month

**Total: $15,600/month**

**Savings with BYOK: $3,101/month** or **$37,212/year**

Beyond Cost: Other Considerations

BYOK Advantages

**Cost Transparency**

// You see exactly what you pay
const openaiInvoice = {
  gpt4Tokens: 10_000_000,
  costPerToken: 0.00004,
  total: 400.00  // No hidden markups
}

**Provider Relationships**

Direct relationship with OpenAI/Anthropic

Access to support channels

Enterprise pricing negotiations

Early access to new models

**Data Security**

Your keys, your data

No third-party key sharing

Compliance-friendly

Full audit trail

**Control**

// You control spending limits
await openai.updateBilling({
  monthlyLimit: 10000,
  alertThreshold: 8000
})

Markup Pricing Advantages

**Simplicity**

// One invoice, one vendor
const invoice = {
  allLLMCosts: 1234.56,
  nothingElseToPay: true
}

**No Upfront Commitment**

No minimum monthly fee

Pay only for what you use

Better for low-volume

**Easier to Start**

No need to sign up with multiple providers

One API key for everything

Faster time to value

Security & Compliance

BYOK Security Model

// Your keys are encrypted at rest
const encryptedKey = await encrypt(yourOpenAIKey, {
  algorithm: 'AES-256-GCM',
  key: customerMasterKey
})

// Platform never sees your plaintext key
// Decrypted only in memory during request
const response = await proxyRequest({
  key: encryptedKey,  // Decrypted just-in-time
  prompt: userPrompt
})

**Benefits**:

**Key rotation**: You control when keys are rotated

**Immediate revocation**: Delete key = instant access cut

**Audit logs**: See every request made with your key

**Compliance**: Easier SOC 2 / HIPAA compliance

Markup Security Model

Platform owns keys → You trust platform

**Risks**:

Platform breach = all customers affected

No direct control over key rotation

Harder to audit individual usage

Compliance more complex

When to Choose BYOK

Choose BYOK if:

✅ Usage > 10M tokens/month

✅ Cost optimization is priority

✅ Compliance requirements (HIPAA, SOC 2)

✅ Want direct provider relationships

✅ Need cost transparency

✅ Enterprise-scale usage

When to Choose Markup

Choose Markup if:

✅ Usage < 5M tokens/month

✅ Simplicity over savings

✅ Testing/prototyping phase

✅ Don't want to manage multiple vendor relationships

✅ Prefer one consolidated invoice

Migration: Markup → BYOK

If you start with markup and outgrow it:

// Step 1: Sign up with providers
const openaiKey = await signUpOpenAI()
const anthropicKey = await signUpAnthropic()

// Step 2: Add keys to platform
await platform.addKey({
  provider: 'openai',
  key: openaiKey,
  encrypted: true
})

// Step 3: Switch pricing model
await platform.updateBillingModel({
  from: 'markup',
  to: 'byok',
  effectiveDate: new Date('2024-04-01')
})

// Step 4: Traffic automatically routes to your keys

The ReForge Approach

At ReForge LLM, we believe in BYOK:

const pricing = {
  model: 'byok',
  monthlyFee: 99,  // Starter
  markup: 0,  // No markup ever
  transparency: 'full',
  ownership: 'customer'
}

**Why**:

**Alignment**: We're aligned with your success (lower costs = happy customers)

**Transparency**: You see exactly what you pay to each provider

**Control**: You own your provider relationships

**Scale**: BYOK saves more as you grow

Key Takeaways

**BYOK wins at scale** - Breakeven around 7-8M tokens/month

**Markup better for small teams** - Simpler, no fixed costs

**Security matters** - BYOK gives you more control

**Calculate your specific scenario** - Run the numbers for your usage

**You can switch later** - Start with markup, migrate to BYOK as you scale

Cost Calculator

function calculateBestModel(monthlyTokens: number): {
  byok: number
  markup: number
  recommendation: string
} {
  const tokenCost = monthlyTokens * 0.00004  // GPT-4 Turbo
  const byokTotal = tokenCost + 99  // BYOK flat fee
  const markupTotal = tokenCost * 1.3  // 30% markup

  return {
    byok: byokTotal,
    markup: markupTotal,
    recommendation: byokTotal < markupTotal ? 'BYOK' : 'Markup'
  }
}

// Example: 20M tokens/month
const result = calculateBestModel(20_000_000)
console.log(\`
BYOK: $\${result.byok.toFixed(2)}
Markup: $\${result.markup.toFixed(2)}
Recommendation: \${result.recommendation}
\`)
// Output:
// BYOK: $899.00
// Markup: $1,040.00
// Recommendation: BYOK

Choose wisely. Your pricing model decision can save (or cost) you thousands per month.