Intelligence Index
0137.5
> 62% OF MODELS
OpenAI
Chatgpt 5.1 (Reasoning)
Updated: September 2026
Specifications
- Context
- 400K
- Input Modalities
- Image, Text, File
- Output Modalities
- Text
- Input
- $1.25/M
- Output
- $10/M
Capabilities
VISIONTHINKING
Similarly Priced Models
| Model | Provider | Context | Input Price | Output Price |
|---|---|---|---|---|
| Grok 4.3 | xAI | 1M | $1.25/M | $2.5/M |
| Chatgpt 5.1 Codex | OpenAI | 400K | $1.25/M | $10/M |
| Chatgpt 5.1 Codex | OpenAI | 400K | $1.25/M | $10/M |
| Chatgpt 5 (Reasoning) | OpenAI | 400K | $1.25/M | $10/M |
| Chatgpt 5 (Reasoning) | OpenAI | 400K | $1.25/M | $10/M |
Performance Metrics
Coding Index
0249.4
> 54% OF MODELS
Agentic Index
0321.6
> 44% OF MODELS
Average Response Performance
- Output Speed
- 97.1 tok/s
- Time To First Token
- 35.4s
- Time To First Answer Token
- 35.4s
- End To End Response Time
- 40.55s
DATA SOURCE: Artificial Analysis