Chat-tuned GPT model for conversational assistance, writing, and tool workflows
Details
| Field | Value |
|---|---|
| id | openai/gpt-5.3-chat |
| modality | text->text |
| context_length | 128000 |
| max_output_tokens | 16380 |
| knowledge_cutoff | 2025-08-31 |
| release_date | 2026-03-20 |
| is_open_weights | no |
| supports_tool_call | yes |
| supports_reasoning | no |
| supports_structured_output | no |
| supports_attachment | yes |
| input_modalities | text |
| output_modalities | text |