GPT-5.3 Chat: Benchmarks, Pricing & Context Window
GPT-5.3 Chat is a language model from OpenAI, released in March 2026, with multimodal input.
GPT-5.3 Chat is the instant model used in ChatGPT. It features high intelligence with medium speed, supporting text and image inputs with a 128k context window. It supports streaming, function calling, and structured outputs, priced at
GPT-5.3 Chat pricing
Providers
GPT-5.3 Chat starts at $1.75 per million input tokens and $14.00 per million output tokens via OpenAI.
| Provider | Input $/M | Output $/M | Max Input | Max Output | Latency s | Throughput | Quant | Input | Output |
|---|---|---|---|---|---|---|---|---|---|
 OpenAI | $1.75 | $14.00 | 128.0K | 16.4K | 1.23 | 149 c/s | — |
GPT-5.3 Chat API
API access coming soon
GPT-5.3 Chat will be available through our gateway shortly.
GPT-5.3 Chat examples
Recent arena outputs from GPT-5.3 Chat, picked from the highest-ranked matchups.
GPT-5.3 Chat license
GPT-5.3 Chat is released under the Proprietary license, which restricts commercial use, has a knowledge cutoff of August 2025.
- License
- Proprietary
- Non-commercial
- Knowledge cutoff
- August 2025
Proprietary license - usage restrictions apply
FAQ
Common questions about GPT-5.3 Chat.