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
Technical details and pricing.
Benchmarks
10 benchmark scores from Artificial Analysis.
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
EU-Hosted Inference API
Power your AI projects with the best open-source models.
Drop-in OpenAI-compatible API. No data leaves Europe.
Explore Inference APIMiniMax
MiniMax M3
$0.40 / $1.40
per M tokens
Z.ai
GLM 5.2
$1.40 / $4.40
per M tokens
MoonshotAI
Kimi K2.7 Code
$0.95 / $4.00
per M tokens
DeepSeek
DeepSeek V4 Pro
$1.80 / $3.60
per M tokens
Frequently Asked Questions
What is GPT-5.3 Chat good for?
Use GPT-5.3 Chat for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.
How much does GPT-5.3 Chat cost?
Pricing is based on usage. Current rates are $1.25/1M tokens for input and $10.00/1M tokens for output.
Can I use GPT-5.3 Chat in LLMBase Chat?
Yes. Use the chat action on this page to open GPT-5.3 Chat in LLMBase Chat. Access still follows the current plan and model tier.
Does GPT-5.3 Chat support images or audio?
GPT-5.3 Chat can understand images.
Similar Models
Other models you might want to explore.
Benchmarks and pricing use Artificial Analysis where available. Catalog specs are used as a fallback.