GPT-5.3 Chat
OpenAI
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
What is GPT-5.3 Chat?
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
Specifications
- Developer: OpenAI
- Context window: 128K tokens
- Max output: 16.4K tokens
- Input modalities: text, image, file
- Output modalities: text
- Input price: $1.75 per 1M tokens
- Output price: $14.00 per 1M tokens
- Knowledge cutoff: —
- Supported parameters: max_completion_tokens, max_tokens, response_format, seed, structured_outputs, tool_choice, tools
Use GPT-5.3 Chat with PromptLayer
PromptLayer lets teams manage, evaluate, and observe prompts that run on GPT-5.3 Chat alongside every other model in their stack. Version prompts, run evals across models, and ship safe rollouts from the same dashboard.
Ready to try it yourself? Sign up for PromptLayer and start managing your prompts in minutes.