Last verified 2025-09-22 (left) · 2025-09-22 (right)
GPT-4.1 nano vs GPT-4o — Pricing & Capability Comparison
GPT-4.1 nano charges $0.10 per million input tokens and $0.40 per million output tokens. GPT-4o comes in at $2.50 / $10.00. Context windows span 128K vs 128K tokens respectively.
TL;DR — Quick Comparison
- ✓GPT-4.1 nano is cheaper overall: $0.50 per 1M tokens (in+out) vs $12.50 for GPT-4o — saves $12.00 per 1M tokens
- ✓Input pricing: GPT-4.1 nano $0.10/1M vs GPT-4o $2.50/1M
- ✓Output pricing: GPT-4.1 nano $0.40/1M vs GPT-4o $10.00/1M
- ✓Context window: GPT-4.1 nano offers more (128K vs 128K)
- ✓Use our calculator below to estimate costs for your specific usage pattern
Input price (per 1M)
GPT-4.1 nano
$0.10
GPT-4o
$2.50
GPT-4.1 nano leads here
Output price (per 1M)
GPT-4.1 nano
$0.40
GPT-4o
$10.00
GPT-4.1 nano leads here
Context window
GPT-4.1 nano
128,000 tokens
GPT-4o
128,000 tokens
GPT-4.1 nano leads here
Cached input
GPT-4.1 nano
Not published
GPT-4o
$1.250
GPT-4o leads here
Cost comparison for 10K-token workloads
Side-by-side pricing for identical workloads (10,000 total tokens per request) across different distributions.
| Scenario | GPT-4.1 nano | GPT-4o | GPT-4o cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0025 | $0.0625 | $0.0563 |
Input-heavy workflow 80% input · 20% output | $0.0016 | $0.0400 | $0.0300 |
Generation heavy 30% input · 70% output | $0.0031 | $0.0775 | $0.0738 |
Cached system prompt 90% cached input · 10% fresh output | $0.0013 | $0.0325 | $0.0212 |
Frequently asked questions
Which is cheaper: GPT-4.1 nano or GPT-4o?
GPT-4.1 nano is cheaper for input tokens at $0.10 per 1M tokens compared to $2.50. For output, GPT-4.1 nano costs $0.40 per 1M tokens versus $10.00 for GPT-4o.
What is the cost per 1M tokens for GPT-4.1 nano?
GPT-4.1 nano pricing: $0.10 per 1M input tokens and $0.40 per 1M output tokens. Context window: 128,000 tokens.
What is the cost per 1M tokens for GPT-4o?
GPT-4o pricing: $2.50 per 1M input tokens and $10.00 per 1M output tokens. Context window: 128,000 tokens.
How much does it cost per 1K tokens?
Per 1K tokens: GPT-4.1 nano costs $0.0001 input / $0.0004 output. GPT-4o costs $0.0025 input / $0.0100 output. This is useful for calculating small-scale usage costs.
Which model supports a larger context window?
GPT-4.1 nano offers 128,000 tokens (128K) versus 128K for GPT-4o.
What is the estimated monthly cost for typical usage?
For a typical workload of 10M input + 2M output tokens per month: GPT-4.1 nano would cost approximately $1.80, while GPT-4o would cost $45.00. GPT-4.1 nano is more economical for this usage pattern.
Do these models support prompt caching?
GPT-4.1 nano does not publish cached pricing. GPT-4o supports caching at $1.250 per 1M tokens, saving up to 50%.
Which model is best for my use case?
Choose GPT-4.1 nano for cost-sensitive applications with high input volume. Choose GPT-4.1 nano if you need 128K context for long documents or conversations. Consider prompt caching if you have repeated context. Use our token calculator to model your specific usage pattern.