GPT-5.3-CHAT-LATEST
GPT-5.3-CHAT-LATEST is a chat model developed by OpenAI, capable of handling various tasks such as function calling, reasoning, and text generation. It genuinely excels at processing and generating human-like text based on its input, and notably features a large context window of over 1 million tokens.
Input
Output
Context
1048K
Max Output
16K
Parameters
-
Technical Specifications
Model TypeChat
Context Window1,047,576 tokens
Max Output Tokens16,384 tokens
ParametersNot available
Release DateFeb 27, 2026
Training CutoffAug 31, 2025
Licenseproprietary
Open SourceNo
Input Modalities
ImageText
Output Modalities
Text
Capabilities
Resources & Links
proprietary, Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: Jun 23, 2026
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