OpenAI
GPT-5
openai/gpt-5
Step-by-step reasoning with careful instruction following.
TextText, Images, Files → TextReady on endue
- Reasoning
- Coding
Overview
Good for
Written by endue
- Reasoning
- Coding
Not ideal for
From the model’s specs
Nothing in the specs rules out common agent work.
Capabilities
| Tool use | Supported |
|---|---|
| Structured output | Supported |
| JSON mode | Supported |
| Reasoning | Supported |
| Vision | Supported |
| Audio input | Not supported |
| Video input | Not supported |
| File input | Supported |
| Long context | Supported |
Specifications
- Model ID
openai/gpt-5- Family
- GPT-5
- Context window
- 400K tokens
- Input
- Text, Images, Files
- Output
- Text
- Knowledge cutoff
- 2026-01
- Released
- 2026-04-12