GPT-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.
Added Jul 9, 2026
Context Window
1.1M
Max Output
128.0K
Input Price (Auto)
$2.50/1M
Output Price (Auto)
$15.00/1M
Cache Read (Auto)
$0.25/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Design Arena.
Best Category
Game Development
Best Elo
1371
Best Rank Percentile
Top 3%
Ranking Distribution
13,982 battles
60%
45%
30%
15%
0%
21.1%
First
43.0%
Second
29.3%
Third
6.7%
Fourth
Category Performance
Models Arena
Game Development
1371
Elo
61.0%
Win
137.3s
Avg Time
#4
Rank
3D
1358
Elo
59.0%
Win
121.3s
Avg Time
#7
Rank
UI Component
1357
Elo
58.8%
Win
114.9s
Avg Time
#4
Rank
SVG
1356
Elo
63.2%
Win
49.1s
Avg Time
#2
Rank
Website
1334
Elo
59.3%
Win
163.9s
Avg Time
#3
Rank
Data Visualization
1331
Elo
56.0%
Win
116.4s
Avg Time
#6
Rank
ASCII Art
1280
Elo
58.2%
Win
39.8s
Avg Time
#12
Rank
Agents Arena
Web Apps
1232
Elo
52.0%
Win
N/A
Avg Time
#19
Rank
Agentic Game Dev
1204
Elo
52.4%
Win
N/A
Avg Time
#6
Rank
Full Stack
1191
Elo
49.8%
Win
N/A
Avg Time
#22
Rank
Native Apps
1178
Elo
48.6%
Win
N/A
Avg Time
#23
Rank
Mobile Apps
1164
Elo
44.0%
Win
N/A
Avg Time
#26
Rank
Updated Aug 24, 2026, 6:23 PM · Matched as GPT 5.6 Sol
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Compare GPT 5.6 Sol with similar models from the same provider or model family.
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 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 Terra
openai/gpt-5.6-terraGPT-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.
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 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.