OpenAI: GPT-5.3 Chatopenai
Bottom Line
OpenAI: GPT-5.3 Chat: $1.75/1M input, $14.00/1M output, 128K context. 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...
API Pricing (per 1M tokens)
| Input | $1.75 |
| Output | $14.00 |
| Cache Read | — |
| Cache Write | — |
| Blended (3:1) | $4.81 |
Specs & Performance
| Context Length | 128K |
| Max Output | 16K |
| Intelligence | — |
| Coding | — |
| Math | — |
| Speed | — |
| TTFT | — |
| CPS Grade | — |
| Input / Output Modalities | text, image, file → text |
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FAQ
How much does the OpenAI: GPT-5.3 Chat API cost?
OpenAI: GPT-5.3 Chat costs $1.75/1M input tokens and $14.00/1M output tokens. Blended cost at a 3:1 ratio is about $4.81/1M tokens.
What is the context window of OpenAI: GPT-5.3 Chat?
OpenAI: GPT-5.3 Chat supports a 128K token context window with up to 16K output tokens.
Is OpenAI: GPT-5.3 Chat worth it?
OpenAI: GPT-5.3 Chat has a CPS grade of — (score —), intelligence index —, coding index —. Use the compare page to benchmark against rivals.