GPT-5.3 & GPT-5.4 Now Available

We're excited to announce the availability of OpenAI's GPT-5.3 and GPT-5.4 on Chat Data. These models bring improved reasoning, coding quality, and massively expanded context windows to your customer support chatbots.

New Models

• GPT-5.3: Next-generation GPT-5 chat model with improved reasoning and a 128K context window
• GPT-5.4: Latest GPT-5 flagship with top-tier reasoning and an industry-leading 1M+ token context window

Key Improvements for Chatbots

• Improved Reasoning: More accurate and nuanced responses to complex customer questions
• Better Coding Quality: Enhanced code generation and technical support capabilities
• Expanded Context Windows: GPT-5.3 supports 128K tokens, while GPT-5.4 offers an industry-leading 1M+ tokens — ideal for processing large knowledge bases and long conversation histories
• Superior Accuracy: Reduced hallucinations and more reliable factual responses
• Enterprise-Ready: GPT-5.4 is ideal for chatbots that need to reference massive documentation or maintain extended conversations

Both models are now available in your Chat Data model selector.