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DeprecatedOPOpenAI/ GPT

GPT-5.3 Chat

openai/gpt-5.3-chat

GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...

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Model information

Released
2026-03-03
Context window
128K
Max output
16K
Weights
Closed

Modalities

Input
DocumentImageText
Output
Text

Identity

Version
gpt-5.3-chat
Aliases
GPT-5.3 Chat (latest)

Capabilities

AttachmentsStructuredTemperatureTool call

Official price

input $1.75/M · output $14/M
cache read $0.175/M

Providers

ProviderProvider model IDProtocolContextMax outputInputOutputCapabilitiesNotesPricingStreaming
LLM Gatewaygpt-5.3-chat-latestopenai_chat128K16K
AttachmentsTool callStructuredTemperature
-
input $1.75/M · output $14/M
cache read $0.175/M
Yes
Abacusgpt-5.3-chat-latestopenai_chat128K16K
AttachmentsReasoningTool callTemperature
-
input $1.75/M · output $14/M
Yes
OrcaRouteropenai/gpt-5.3-chat-latestopenai_chat128K16K
AttachmentsTool callStructuredTemperature
-
input $1.75/M · output $14/M
cache read $0.175/M
Yes
Merge Gatewayopenai/gpt-5.3-chat-latestopenai_chat128K16K
AttachmentsTool callStructuredTemperature
-
input $1.75/M · output $14/M
cache read $0.175/M
Yes
OpenAIgpt-5.3-chat-latestopenai_responses128K16K
AttachmentsTool callStructuredTemperature
-
input $1.75/M · output $14/M
cache read $0.175/M
Yes
OpenRouteropenai/gpt-5.3-chatopenai_chat128K16K
AttachmentsTool callStructured
Moderated, Expires: 2026-08-10
input $1.75/M · output $14/M
cache read $0.175/M
Yes
ZenMuxopenai/gpt-5.3-chatopenai_chat128K16K
AttachmentsTool callTemperature
-
input $1.75/M · output $14/M
Yes
Kilo Gatewayopenai/gpt-5.3-chatopenai_chat128K16K
AttachmentsTool callStructured
-
input $1.75/M · output $14/M
cache read $0.175/M
Yes
Vercel AI Gatewayopenai/gpt-5.3-chatopenai_chat128K16K
AttachmentsTool callTemperature
-
input $1.75/M · output $14/M
cache read $0.175/M
Yes

FAQ