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GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.
Quality Index
26.8
126th of 442
Top 29%
Coding Index
20.3
145th of 352
Top 41%
Math Index
83.7
51st of 268
Top 20%
Price/1M
$0.14
253rd cheapest
55% below median
Top 38%
Speed
151 tok/s
Top 14%
TTFT
59.25s
Context Window
400K
41st largest
Top 16%
Input
$0.05
per 1M tokens
Output
$0.40
per 1M tokens
Blended
$0.14
per 1M tokens
Cheaper than 62% of models. Median price is $0.31/1M tokens.
Daily
$0.14
Monthly
$4.14
151
tokens/sec
Faster than 86% of models
59.25
seconds
Faster than 1% of models
59.25
seconds
Faster than 2% of models
Market Median
46 tok/s
231% faster
Median TTFT
0.42s
14074% slower
Throughput/Dollar
1095
tok/s per $/1M
Speed Comparison
Context Window
400K
tokens
Larger than 84% of models
Max Output
128K
tokens
32% of context