GPT-5.6 terra
openai
Coding Score
99.5
Context
1M
Input Price
$10
per 1M tokens
Output Price
$60
per 1M tokens
Strengths
- + Best-in-class deep reasoning for multi-file refactors
- + Excels at long-horizon agentic coding tasks
- + Superior architectural design and system planning
- + Strong tool-use and autonomous task completion
Weaknesses
- − Most expensive model in the GPT-5.6 family
- − Higher latency due to extended reasoning chains
Best For
Autonomous agentic workflows Large-scale refactoring System architecture design Codex CLI complex tasks
Try GPT-5.6 terra
Last updated: July 15, 2026