GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between flagship Sol and cost-efficient Luna. It is suited for everyday coding, reasoning, agentic work, and general professional tasks.
Added Jul 9, 2026
Context Window
1.1M
Max Output
128.0K
Input Price (Auto)
$1.00/1M
Output Price (Auto)
$6.00/1M
Cache Read (Auto)
$0.10/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Design Arena.
Best Category
UI Component
Best Elo
1287
Best Rank Percentile
Top 18%
Ranking Distribution
50,909 battles
60%
45%
30%
15%
0%
12.9%
First
37.3%
Second
37.1%
Third
12.7%
Fourth
Category Performance
Models Arena
UI Component
1287
Elo
51.7%
Win
46.5s
Avg Time
#27
Rank
Website
1282
Elo
52.8%
Win
62.4s
Avg Time
#24
Rank
Game Development
1269
Elo
49.2%
Win
54.9s
Avg Time
#33
Rank
Data Visualization
1264
Elo
51.1%
Win
50.8s
Avg Time
#27
Rank
SVG
1249
Elo
52.1%
Win
21.0s
Avg Time
#23
Rank
ASCII Art
1203
Elo
45.8%
Win
16.1s
Avg Time
#25
Rank
3D
1192
Elo
39.1%
Win
45.5s
Avg Time
#66
Rank
Agents Arena
Web Apps
1160
Elo
38.7%
Win
N/A
Avg Time
#31
Rank
Mobile Apps
1157
Elo
40.9%
Win
N/A
Avg Time
#28
Rank
Full Stack
1093
Elo
32.0%
Win
N/A
Avg Time
#30
Rank
Native Apps
1090
Elo
30.4%
Win
N/A
Avg Time
#30
Rank
Agentic Game Dev
1077
Elo
35.3%
Win
N/A
Avg Time
#20
Rank
Updated Aug 25, 2026, 9:51 AM · Matched as GPT 5.6 Terra
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Compare GPT 5.6 Terra with similar models from the same provider or model family.
GPT 5.6 Terra Pro
openai/gpt-5.6-terra-proGPT-5.6 Terra with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
GPT 5.6 Luna
openai/gpt-5.6-lunaGPT-5.6 Luna is the fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume chat, classification, lightweight agentic workflows, and latency-sensitive reasoning tasks.
GPT 5.6 Luna Pro
openai/gpt-5.6-luna-proGPT-5.6 Luna with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
GPT 5.6 Sol
openai/gpt-5.6-solGPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, agentic workflows, command-line work, and multi-step professional tasks.
GPT 5.6 Sol Pro
openai/gpt-5.6-sol-proGPT-5.6 Sol with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
GPT Chat Latest
openai/gpt-chat-latestCompatibility chat alias that routes to GPT 5.6 Sol, the flagship GPT-5.6 tier for complex reasoning, coding, and agentic workflows.