GPT-5.6 Terra
Active Parameters
Undisclosed
Context Length
1.05M
Modality
Multimodal
Architecture
Mixture of Experts (MoE)
License
Proprietary
Release Date
9 Jul 2026
Knowledge Cutoff
Feb 2026
API Pricing (per 1M)
Input: $2.00 · Output: $12.00
Evaluation Benchmarks
Rank
#15
| Benchmark | Score | Rank |
|---|---|---|
Reasoning | max 0.91 | 5 |
Mathematics | max 0.95 | 8 |
Coding Index | max 0.77 high 0.67 medium 0.65 low 0.58 Standard 0.52 | 8 49 56 64 73 |
Graduate-Level QA | 0.929 | 8 |
Data Analysis | max 0.79 | 9 |
General | max 0.78 | 13 |
LiveBench Average | max 0.78 | 13 |
Agentic Coding | max 0.55 | 19 |
Intelligence Index | max 0.47 high 0.41 medium 0.37 low 0.32 Standard 0.26 | 19 46 55 74 113 |
Coding | max 0.78 | 20 |
Agent Arena | max 0.03 | 23 |
Agentic Index | max 0.44 high 0.38 medium 0.32 low 0.27 Standard 0.25 | 26 37 46 54 59 |
Web Development | max 1520 | 32 |
General Text | max 1466 | 37 |
Rankings
Overall Rank
#15
Coding Rank
#29
About GPT-5.6 Terra
OpenAI's GPT-5.6 Terra is the balanced production workhorse delivering near-flagship intelligence at half the cost of Sol, ideal for code generation, structured extraction, and general-purpose agents.
Technical Specifications
Architecture specifications are undisclosed for proprietary models.
Resources
About GPT-5.6
OpenAI's GPT-5.6 series represents the next-generation frontier intelligence family structured into three tiered variants: Sol (flagship reasoning and autonomous agents), Terra (balanced everyday production workhorse), and Luna (lightweight, ultrafast, cost-effective inference). It introduces new max and ultra (sub-agent coordination) reasoning modes, native programmatic tool calling, a 1M token context window with 128k output tokens, and a February 16, 2026 knowledge cutoff.