Op
gpt-5.6-luna Benchmark & Insights
OpenAI OpenAI API
Updated Jul 31, 2026 All models
Sample size
170 runs
in window
Accuracy
93.2%
consensus match · 176d
Confidence
92%
over 178 runs
Window end
Jul 31, 2026
most recent run
Input price
$0.20/MTok
prompt tokens
Output price
$1.20/MTok
completion tokens
Model insights
- 01 Best of the GPT line, and after the July price cut one of the cheapest models here — a strong pairing.
- 02 Its errors run both ways: it jumps to "high" and "unsafe" on "medium" days roughly half a dozen times, then drops to "low" on "medium" days elsewhere.
- 03 That makes it noisy rather than tilted one way.
Notes
OpenAI Cuts GPT-5.6 Luna Pricing by 80% on July 30, 2026. Previous pricing was $1 for input tokens, and $6 for output.
Recent forecasts