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OpenAI: GPT-5.6 Terra
Openaitext9.2 / 10 Overall Rating
OpenAI's GPT-5.6 Terra is a mid-tier model designed for coding, reasoning, and agentic workflows. It features a 1,050,000-token context window and a 128,000 max output limit at $2.00 input and $12.00 output per million tokens. It significantly expands context capacity and output length compared to GPT-4o and Claude 3.5 Sonnet.
Context Window
1050K
Knowledge Cutoff
2025
Max Output
16K
License
Proprietary
Where it Excels (Pros)
- 1.05M token context window
- 128K max output token limit
- Lower input cost than GPT-4o
Limitations (Cons)
- Higher output cost than GPT-4o
- Sub-flagship tier in GPT-5.6 family
Benchmark Breakdown
Reasoning (MMLU)88%
Coding (HumanEval)86%
Mathematics (MATH)84%
Long-Context Retrieval95%
Pricing Matrix
Input cost / 1M tokens$2.00
Output cost / 1M tokens$12.00
Compare OpenAI: GPT-5.6 Terra with other frontier models:
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