GPT-5.3 Chat
OpenAIGPTProprietary
Description
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 $1.75/1M input and $14.00/1M output tokens.
Release Date
2026-03-04
Parameters
—
Context Length
128K
Modalities
file, image, text
Capability Radar
28
general
0
coding
28
reasoning
34
scienceest.
0
agents
70
multimodal
Science uses a reasoning proxy when dedicated science benchmarks are unavailable.
Rankings
No ranking data available
Benchmark Scores (LLM Stats)
Healthcare
HealthBench
54.1%SR
HealthBench Hard
25.9%SR
AA Evaluation Indices
No AA evaluation data available
LLM Stats Category Scores
Healthcare40
Pricing
Input Price$1.75 / 1M tokens
Output Price$14 / 1M tokens
Blended Price (3:1)$4.8125 / 1M tokens
Speed
No speed data available
Available Providers
(LS internal units)| Provider | Input Price | Output Price |
|---|---|---|
| OpenAI | 1.8M | 14.0M |