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GPT-5.6 Terra (AWS Mantle)

gpt-terra Reasoning Tool Calling Attachments Structured Output

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

Providers 1
Released Jul 9, 2026
Input Modalities text, image, pdf
Output Modalities text
Tarsk Use coding

Benchmarks

56.6
Intelligence Index
76.7
Coding Index

Available Providers (1)

Provider Model ID Input Cost Output Cost Context Max Output Docs
LLM Gateway aws-mantle/gpt-5.6-terra $2.20/MTok $13.20/MTok 278.5K 128K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output