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
image, text
Capability Radar
28
general
0
coding
28
reasoning
34
scienceest.
20
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$0 / 1M tokens
Output Price$0.00001 / 1M tokens
Blended Price (3:1)$0 / 1M tokens
Cache Read Price$0.175 / 1M tokens
Speed
No speed data available
Provider Price Ranking
Provider Price Ranking
10 providers
Cheapest: OpenAIMost Expensive: Merge Gateway
ProviderInputOutput
1OpenAIPRIMARY
$0
$0.00001
2Abacus
$1.75
$14
3OpenRouter
$1.75
$14
4ZenMux
$1.75
$14
5Kilo Gateway
$1.75
$14
6Vercel AI Gateway
$1.75
$14
7LLM Gateway
$1.75
$14
8Azure
$1.75
$14
9OrcaRouter
$1.75
$14
10Merge Gateway
$1.75
$14
Compare pricing across different API providers for this model.