It adds up of everyone uses it
To include the cost of GPT-3.5, we need to account for hosting and running the model, whether using OpenAI’s API or deploying GPT-3.5 privately. Let’s break it down:
Scenarios for GPT-3.5 Deployment
- Using OpenAI API:
• Pay-per-use pricing for queries (as estimated earlier).
• No need for additional infrastructure, but you are bound by API pricing.
- Self-Hosting GPT-3.5:
• Requires significant infrastructure to host and run the model.
• Includes GPU/TPU costs, power, maintenance, and software optimization.
Assumptions (Updated)
• API Cost: Direct use of GPT-3.5 API.
• Already included in query costs ($0.002625 per query).
• Self-Hosting:
• Requires GPUs like NVIDIA A100 or H100.
• Memory requirements: ~350 GB VRAM for GPT-3.5 (estimate based on model size).
• Power and cooling costs are included.
• Model Maintenance Costs:
• Fine-tuning and hosting models involve ongoing costs for storage, updates, and scaling.
Cost Breakdown
- OpenAI API (Outsourced Hosting)
As calculated earlier:
• Query Cost for 10 years (25M queries/year, including token costs): $470,625.
- Self-Hosting GPT-3.5
Infrastructure Requirements:
• Compute:
• Hosting GPT-3.5 requires high-performance GPUs.
• Assume 4 NVIDIA A100 GPUs (~$10,000 each) for redundancy and scaling.
• Server Costs:
• High-performance servers: ~$40,000 total (one-time).
• Electricity & Cooling:
• GPUs consume ~300W per GPU (A100).
• Monthly power cost for 4 GPUs = ~$250 (based on $0.10/kWh).
• Annual cost: $3,000.
• 10 years: $30,000.
• Maintenance:
• 10% annual maintenance on hardware = $12,000 over 10 years.
Total Infrastructure Cost (10 years):
• GPUs: $40,000.
• Servers: $40,000.
• Electricity & Cooling: $30,000.
• Maintenance: $12,000.
Total: $122,000 for hosting.
Model Deployment Costs:
• Initial Model Fine-tuning: ~$50,000 (if customized data and fine-tuning are needed).
• Storage for Model Weights: Minimal additional cost (covered earlier in data storage).
Self-Hosting Total: ~$172,000 for 10 years.
Total Cost Comparison
Option 1: OpenAI API (Outsourced)
• Query Costs: $470,625 over 10 years.
• Storage: $186 over 10 years.
• Total: $470,811.
Option 2: Self-Hosting GPT-3.5
• Hosting Costs: $172,000 over 10 years.
• Query Costs (Maintenance/Staff): $50,000 over 10 years.
• Storage: $186 over 10 years.
• Total: $222,186.
Query Cost After 10 Years
If hosting is outsourced (OpenAI API):
• Query cost reduces with scale and efficiency to $0.000947 per query.
If self-hosted:
• Query costs are largely infrastructure-dependent, with a minimum of $0.00044 per query (based on $222,186 total for 10 years, including 250M queries).
Imported from rifaterdemsahin.com · 2025