GPT-5 Chat
OpenAI Generally Available
GPT-5 Chat is designed for advanced, natural, multimodal, and context-aware conversations for enterprise applications.
Context
128K
tokens
Input
$1.25
per MTok
Output
$10.00
per MTok
About
GPT-5 Chat is designed for advanced, natural, multimodal, and context-aware conversations for enterprise applications.
Modalities
Input
file Vision Text
Output
Text
Code Examples
curl https://api.openai.com/v1/chat/completions \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5-chat",
"messages": [
{ "role": "user", "content": "Explain quantum entanglement in one sentence." }
]
}' API Parameters
| Name | Type | Description |
|---|---|---|
max_tokens deprecated | integer | Deprecated. Use max_completion_tokens. |
response_format | one of | Constrain output to a JSON schema or an enum (structured outputs). |
seed | integer | Deterministic seed for sampling. Same seed + same prompt produces identical output. |
structured_outputs | boolean | Enable JSON-schema-constrained output. |
Standard OpenAI-compatible parameters. Consult the provider docs for model-specific behaviour.