Intelligence Index
0144.3
> 91% OF MODELS
OpenAI
Chatgpt 5.3 Codex
Updated: July 2026
OpenAI's advanced agentic coding model for complex multi-step development workflows.
Specifications
- Context
- 400K
- Input
- $1.75/M
- Output
- $14/M
Capabilities
CODINGVISIONTHINKING
Similarly Priced Models
| Model | Provider | Context | Input Price | Output Price |
|---|---|---|---|---|
| Chatgpt 5.3 | OpenAI | 128K | $1.75/M | $14/M |
| Chatgpt 5.2 (Reasoning) | OpenAI | 400K | $1.75/M | $14/M |
| Chatgpt 5.2 | OpenAI | 128K | $1.75/M | $14/M |
| Chatgpt 5.2 (Reasoning) | OpenAI | 400K | $1.75/M | $14/M |
| Chatgpt 5.2 (Reasoning) | OpenAI | 400K | $1.75/M | $14/M |
Performance Metrics
Average Response Performance
- Output Speed
- 76.9 tok/s
- Time To First Token
- 79.01s
- Time To First Answer Token
- 79.01s
- End To End Response Time
- 85.52s
DATA SOURCE: Artificial Analysis