Op
gpt-5-nano
Benchmark & Insights
OpenAI OpenAI API
Updated Oct 4, 2026 All models
Sample size
232 runs
in window
Accuracy
63.3%
reference match · 251d
Confidence
68%
over 253 runs
Window end
Oct 4, 2026
most recent run
Input price
$0.05/MTok
prompt tokens
Output price
$0.40/MTok
completion tokens
Model insights
- 01 The cheapest model ($0.05/$0.40) misses only 3 "unsafe" days, but because it over-warns.
- 02 It called 32 "MEDIUM_SAFE" days "unsafe" and 15 of them "high".
- 03 Deprecated with a December 11, 2026 deadline.
Notes
gpt-5-nano marked as deprecated with a December 11, 2026 migration deadline.
Recent forecasts