Op
gpt-5-nano Benchmark & Insights
OpenAI OpenAI API
Updated Jul 31, 2026 All models
Sample size
170 runs
in window
Accuracy
70.4%
consensus match · 206d
Confidence
67%
over 208 runs
Window end
Jul 31, 2026
most recent run
Input price
$0.05/MTok
prompt tokens
Output price
$0.40/MTok
completion tokens
Model insights
- 01 The cheapest OpenAI model and it behaves like it: sixty-seven upward misses, many escalating a "medium" day to "high" and "unsafe".
- 02 It also misses downward a handful of times, so the errors are not even predictably one-sided.
Recent forecasts