Op
gpt-5.6-terra Benchmark & Insights
OpenAI OpenAI API
Updated Jul 31, 2026 All models
Sample size
170 runs
in window
Accuracy
66.0%
consensus match · 206d
Confidence
92%
over 208 runs
Window end
Jul 31, 2026
most recent run
Input price
$2.00/MTok
prompt tokens
Output price
$12.00/MTok
completion tokens
Model insights
- 01 By far the worst of the three GPT-5.6 variants, and the contrast is stark — Luna, at a tenth the price, sits near the top of the table.
- 02 Terra escalates constantly, with dozens of "high" and "unsafe" calls on ordinary days, and it never once erred low.
Notes
OpenAI Cuts GPT-5.6 Terra Pricing by 80% on July 30, 2026. Previous pricing was $2.5 for input tokens, and $15 for output.
Recent forecasts