How much does GPT-5.3 Chat cost?

GPT-5.3 Chat costs $1.75 per million input tokens and $14.00 per million output tokens. For a typical conversation (~2,000 tokens), that's approximately $0.018 per message.

What benchmarks has GPT-5.3 Chat been tested on?

GPT-5.3 Chat has not been benchmarked yet. Scores are added as benchmarks are published.

Is GPT-5.3 Chat open source?

No, GPT-5.3 Chat is a proprietary model by OpenAI.

How does GPT-5.3 Chat compare to 3b De Ft Research_release?

GPT-5.3 Chat has an average score of 0.0 while 3b De Ft Research_release scores 0.0. 3b De Ft Research_release slightly outperforms GPT-5.3 Chat overall. See full comparison →

Home/Models/GPT-5.3 Chat

GPT-5.3 Chat

Name: GPT-5.3 Chat
Price: 1.75 USD
Author: OpenAI

by OpenAI · Released Mar 2026

Multimodal

Compare

Context

128K tokens (~64 books)

Input $/1M

$1.75

Output $/1M

$14.00

Type

multimodal

License

Proprietary

Benchmarks

0 tested

Data updated today

About

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...

No benchmark data available yet.

Model Family · OpenAI GPT-5.3

GPT-5.3 ChatMar 2026

$1.75/M in128Kctx

GPT-5.3-CodexFeb 2026

52.2+52.2

$1.75/M in400Kctx(+272K)9 benchmarks

See the full GPT-5.3 family →

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