OpenAI's 2026 Model Lineup
OpenAI now offers 13 models with prices spanning a 600× range. Choosing the right model is the single biggest cost lever you have.
Current Pricing (per million tokens)
| Model | Input $/M | Output $/M | Best For |
|---|---|---|---|
| GPT-4.1 Nano | $0.10 | $0.40 | High-volume simple tasks |
| GPT-4o Mini | $0.15 | $0.60 | Classification, extraction |
| GPT-4.1 Mini | $0.40 | $1.60 | Balanced cost/quality |
| GPT-3.5 Turbo | $0.50 | $1.50 | Legacy compatibility |
| o3-mini | $1.10 | $4.40 | Reasoning on a budget |
| o4-mini | $1.10 | $4.40 | Latest reasoning, budget |
| GPT-4.1 | $2.00 | $8.00 | Complex generation |
| GPT-4o | $2.50 | $10.00 | General purpose flagship |
| o1-mini | $3.00 | $12.00 | Math and code reasoning |
| o3 | $10.00 | $40.00 | Advanced reasoning |
| GPT-4 Turbo | $10.00 | $30.00 | Legacy, high quality |
| o1 | $15.00 | $60.00 | Premium reasoning |
| GPT-4 | $30.00 | $60.00 | Legacy, maximum quality |
The New GPT-4.1 Family
Released in early 2026, the GPT-4.1 family is OpenAI's efficiency play:
For most new projects, start with GPT-4.1 Nano and upgrade only if quality requires it.
Optimization Strategy by Use Case
Customer Support Chatbots
Recommended: GPT-4o-mini or GPT-4.1 Nano
Most support queries are simple lookups or FAQ answers. Use GPT-4o-mini as your default, escalate to GPT-4o for complex cases (detected by a simple keyword/length heuristic).
Expected cost: $0.003–$0.008 per conversation (vs. $0.045 with GPT-4).
Code Generation
Recommended: GPT-4.1 or o3-mini
GPT-4.1 offers excellent code generation at $2/$8. For problems requiring multi-step reasoning (debugging, architecture), use o3-mini at $1.10/$4.40.
Document Processing
Recommended: GPT-4.1 Nano for extraction, GPT-4.1 for analysis
Process 10,000 documents/day at under $50/day using GPT-4.1 Nano for field extraction and GPT-4.1 for complex analysis tasks.
Reasoning & Math
Recommended: o3-mini or o4-mini
The o-series models are specifically trained for reasoning. o3-mini at $1.10/$4.40 is 10× cheaper than o1 with comparable reasoning quality for most tasks.
Cost Monitoring is Non-Negotiable
With 13 models and prices ranging from $0.10 to $60.00 per million tokens, you need automated monitoring:
Use the AI Cost Calculator to model your specific workload across all 13 OpenAI models.