GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
Rank
#274
Up 321% week over week
Tokens
496.9M
2026-08-14
Requests
31.1K
31,075
Tool calls
-
Input / M
$0.10
Output / M
$0.60
Cache / M
$0.01
Context
1.1M
1,050,000 tokens