FFree
OpenAIClosed Weights

GPT-5.3 Chat (latest)

gpt-5.3-chat-latest

Best Input Price

$1.75 / 1M

Chat-tuned GPT model for conversational assistance, writing, and tool workflows

Context Window

128,000 tokens

Reasoning

No

Tool Calling

Supported

Released

2026-03-03

Inference Providers (3)

ProviderModel IDContextInput / 1MOutput / 1MAction
302.AIgpt-5.3-chat-latest128,000$1.75$14.00Docs ↗
Merge Gatewayopenai/gpt-5.3-chat-latest128,000$1.75$14.00Docs ↗
Oppergpt-5.3-chat-latest128,000$1.75$14.00Docs ↗