OpenAI: GPT-5.3 Chat Pricing & Specs
Released: 2026-03-03
OpenRouter Model ID
openai/gpt-5.3-chatOpenAI: GPT-5.3 Chat is an API-access large language model from Openai priced at $1.75/1M input tokens and $14.00/1M output tokens with a 128k context window. Context caching reduces input costs to $0.88/1M for cache reads. Supported capabilities include tool calling.
Economics (OpenRouter)
Input / 1M
$1.75
Output / 1M
$14.00
Est. Monthly Cost
$194.78
Based on current usage settings
Cache Read$0.88
Cache Write$2.19
Capabilities (models.dev)
ReasoningNo
Tool CallSupported
Audio InNo
Audio OutNo
Modalitymultimodal
Context Window128k
Benchmarks (AA)
Intelligence Index
General reasoning and knowledge
—
Coding Index
Code generation & debugging
—
Math Index
Mathematical reasoning
—
Performance
—tokens/sec
* Median output throughput
Model ID: openai/gpt-5.3-chat • Data Sources: OpenRouter, Artificial Analysis, models.dev