openai

OpenAI: GPT-5.6 Terra Pro

GPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...

openai/gpt-5.6-terra-pro

Context Size

1,050K

Input Price

300,000 pts/M18,450 Ks/M

Output Price

1,800,000 pts/M110,700 Ks/M

Architecture

File

Image

Text

Supported Parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity

Details

TokenizerGPT

Max Completion128,000 tokens

Provider Context1,050K tokens

ModeratedYes

CreatedJul 9, 2026