GPT 5.3 Codex

gpt-5.3-codex
Price
$1.20 â€ĸ $9.60
Cache Price
$0.12 â€ĸ $1.20
Input
Output

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Specifications

Context Window
400K
Max Output Tokens
128K
Announced Date
2026-02-05
Released Date
2026-02-05
Reasoning Token Support
✓

Modalities

Text

Input and output

Image

Not supported

Audio

Not supported

Video

Not supported

Endpoints

OpenAI Compatible
Chat Completions
/v1/chat/completions
Responses
/v1/responses
Embeddings
/v1/embeddings
Image Generation
/v1/images/generations
Image Edit
/v1/images/edits
Videos
/v1/videos
Claude Compatible
Messages
/v1/messages
Gemini Compatible
Generate Content
/v1beta/models/{model}:{operator}

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Subscription & Pay-as-you-go
Powerful API Access
High Cost-Effectiveness
Interactive Studio UI
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