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
#21
| Benchmark | Score | Rank |
|---|---|---|
Reasoning | max 0.91 | 6 |
Graduate-Level QA | 0.929 | 9 |
Mathematics | max 0.95 | 10 |
Data Analysis | max 0.79 | 10 |
Coding Index | max 0.77 high 0.67 medium 0.65 low 0.58 Standard 0.52 | 10 54 61 72 83 |
General | max 0.78 | 16 |
LiveBench Average | max 0.78 | 16 |
Coding | max 0.78 | 22 |
Agentic Coding | max 0.55 | 22 |
Agent Arena | max 0.01 | 28 |
Agentic Index | max 0.43 high 0.37 medium 0.30 low 0.26 Standard 0.23 | 30 46 58 68 73 |
Web Development | max 1521 | 37 |
General Text | max 1466 | 40 |
Intelligence Index | max 0.38 high 0.34 medium 0.30 low 0.28 Standard 0.21 | 46 57 77 93 134 |
Rankings
Overall Rank
#21
Coding Rank
#35
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.