GPT-5.3 Chaton Krater.ai
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
Released March 3, 2026
Specifications
GPT-5.3 Chat at a glance
Context
128K tokens
Max output
16.4K tokens
Input
Text, Image, File
Output
Text
Input price
$1.75 / 1M
Output price
$14.00 / 1M
Krater rank
#39
Capabilities
What it is good at
Catalog capabilities
- Accepts image input
- Generates text responses
- Supports tool calling
- Supports structured outputs
Good for
Compare
Compare GPT-5.3 Chat
GPT-5.3 Chat vs GPT-5.2
GPT-5.2 is the latest frontier-grade model in the GPT-5 series, offering stronger agentic and long context perfomance compared to GPT-5.1.
Open comparisonGPT-5.3 Chat vs GPT-5.6 Terra Pro
GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks. Learn more in OpenAI's docs:
Open comparisonGPT-5.3 Chat vs GPT-4o (2024-11-20)
The 2024-11-20 version of GPT-4o offers a leveled-up creative writing ability with more natural, engaging, and tailored writing to improve relevance & readability.
Open comparisonFAQ
Questions about GPT-5.3 Chat
Clear answers based on the model catalog and Krater access.
Use GPT-5.3 Chat in your API
Connect with Krater's unified API.