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...
Released
2026-03-03
Context window
128K
Max output
16K
Weights
Closed
Modalities
Input
TextImageDocument
Output
Text
Identity
- Version
- gpt-5.3-chat
- Aliases
- GPT-5.3 Chat (latest)
Providers
| Provider | Provider model ID | Protocol | Context | Max output | Input | Output | Capabilities | Notes | Pricing | Streaming |
|---|---|---|---|---|---|---|---|---|---|---|
| LLM Gateway | gpt-5.3-chat-latest | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M · cache read $0.175/M output $14/M | Yes |
| Abacus | gpt-5.3-chat-latest | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M output $14/M | Yes |
| OrcaRouter | openai/gpt-5.3-chat-latest | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M · cache read $0.175/M output $14/M | Yes |
| Merge Gateway | openai/gpt-5.3-chat-latest | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M · cache read $0.175/M output $14/M | Yes |
| OpenAI | gpt-5.3-chat-latest | openai_responses | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M · cache read $0.175/M output $14/M | Yes |
| OpenRouter | openai/gpt-5.3-chat | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | Moderated, Expires: 2026-08-10 | input $1.75/M · cache read $0.175/M output $14/M | Yes |
| ZenMux | openai/gpt-5.3-chat | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M output $14/M | Yes |
| Kilo Gateway | openai/gpt-5.3-chat | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M · cache read $0.175/M output $14/M | Yes |
| Vercel AI Gateway | openai/gpt-5.3-chat | openai_chat | 128K | 16K | TextImageDocument | Text | AttachmentsTool callStructuredTemperature | - | input $1.75/M · cache read $0.175/M output $14/M | Yes |
Capabilities
AttachmentsTool callStructuredTemperature
Official price
input $1.75/M · cache read $0.175/M
output $14/M