AI Coding Cost Per Line of Code in 2026: Every Major Model Compared
June 4, 2026 · 5 min read
The Cost of a Single Line of Code
Every time an AI model generates a line of code, you're paying for tokens. But how much exactly? We calculated the cost per line of AI-generated code across every major model available in 2026, using a consistent methodology.
Methodology: One average line of generated code requires approximately 3 input tokens (prompt context per line) and 15 output tokens (the generated code itself). This accounts for typical indentation, variable names, and syntax. We apply each model's published per-token pricing to these numbers.
Complete Cost-Per-Line Table
| Model | Input $/M | Output $/M | Cost/Line | Lines per $1 |
|---|---|---|---|---|
| Claude Opus 4 | $15 | $75 | $0.00117 | 855 |
| GPT-4.1 | $2 | $8 | $0.000126 | 7,937 |
| Claude Sonnet 4 | $3 | $15 | $0.000234 | 4,274 |
| Gemini 2.5 Pro | $1.25 | $10 | $0.000154 | 6,494 |
| GPT-4.1 mini | $0.40 | $1.60 | $0.0000252 | 39,683 |
| Claude Haiku 3.5 | $0.80 | $4 | $0.0000624 | 16,026 |
| Gemini 2.5 Flash | $0.15 | $3.50 | $0.0000530 | 18,868 |
| DeepSeek V3 | $0.27 | $1.10 | $0.0000173 | 57,803 |
| GPT-4.1 nano | $0.10 | $0.40 | $0.0000063 | 158,730 |
| DeepSeek V4 Flash | $0.07 | $0.28 | $0.0000044 | 227,273 |
The 240x Price Gap
The cheapest model (DeepSeek V4 Flash at $0.0000044/line) is roughly 240 times cheaper than the most expensive (Claude Opus 4 at $0.00117/line). For $1, you can generate 855 lines with Opus or 227,273 lines with DeepSeek V4 Flash.
But cost per line isn't the whole story. Cheaper models often require more iterations — generating incorrect code that needs regeneration. A model that gets it right on the first try at $0.001/line may be cheaper in practice than one that takes 5 attempts at $0.00005/line.
Real-World Cost: Building a Feature
A typical feature (500 lines of code) costs between $0.002 (DeepSeek V4 Flash) and $0.59 (Claude Opus 4) in raw generation costs. Factor in context loading, retries, and multi-file edits, and real costs are typically 5-10x the raw per-line number.
Use our AI Cost Estimator to calculate realistic per-feature costs that account for context overhead and retry patterns across all models.
Frequently Asked Questions
How much does one line of AI-generated code cost?
It ranges from $0.0000044 (DeepSeek V4 Flash) to $0.00117 (Claude Opus 4) per line — a 240x difference. Mid-range models like GPT-4.1 cost about $0.000126 per line.
How many tokens does one line of code use?
On average, generating one line of code requires approximately 3 input tokens (for the prompt context allocated to that line) and 15 output tokens (the generated code itself), including whitespace and syntax.
Is the cheapest model always the best value for coding?
No. Cheaper models often produce lower-quality code requiring more iterations. A model that costs 10x more per line but generates correct code on the first try can be cheaper overall when you factor in retry costs.
How much does it cost to generate a full feature with AI?
A 500-line feature costs $0.002 to $0.59 in raw generation. With context loading and retries, expect 5-10x more in practice, so roughly $0.01 to $6 per feature depending on model and complexity.
Want to calculate exact costs for your project?
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