Intelligence Index
0142.5
> 94% OF MODELS
OpenAI
GPT-5.6 Sol
Updated: September 2026
OpenAI's flagship GPT-5.6 model for demanding coding, knowledge work, and long-running agentic tasks.
Specifications
- Context
- 1M
- Max Output
- 128K
- Input Modalities
- Image, Text, File
- Output Modalities
- Text
- Input
- $5/M
- Output
- $30/M
Capabilities
VISIONTHINKINGCODINGWRITING
Similarly Priced Models
| Model | Provider | Context | Input Price | Output Price |
|---|---|---|---|---|
| GPT-6 Astra (batch) | OpenAI | 1M | $5/M | $25/M |
| GPT-6 Astra Pro (batch) | OpenAI | 1M | $5/M | $25/M |
| Claude Fable 5.1 (batch) | Anthropic | 1M | $5/M | $25/M |
| Claude Opus 5 | Anthropic | 1M | $5/M | $25/M |
| Claude Opus 5 | Anthropic | 1M | $5/M | $25/M |
Performance Metrics
Coding Index
0277.2
> 97% OF MODELS
Agentic Index
0344.7
> 86% OF MODELS
Average Response Performance
- Output Speed
- 60.7 tok/s
- Time To First Token
- 15.49s
- Time To First Answer Token
- 15.49s
- End To End Response Time
- 23.73s
DATA SOURCE: Artificial Analysis