Question 1

What is the cost of GPT-5.3-Codex by Requesty?

Accepted Answer

GPT-5.3-Codex by Requesty costs $1.75 per 1M input tokens and $14.00 per 1M output tokens. Cached reads cost $0.17 per 1M tokens.

Question 2

What is the context window of GPT-5.3-Codex by Requesty?

Accepted Answer

GPT-5.3-Codex by Requesty has a context window of 400K tokens. It supports up to 400K input tokens and can generate up to 128K output tokens.

Question 3

What are the capabilities of GPT-5.3-Codex by Requesty?

Accepted Answer

GPT-5.3-Codex by Requesty supports advanced reasoning, tool calling/function calling, structured output, file attachments. It has closed weights.

Question 4

What input and output types does GPT-5.3-Codex support?

Accepted Answer

GPT-5.3-Codex by Requesty accepts text, image, pdf as input and can generate text as output.

Question 5

Does GPT-5.3-Codex by Requesty support reasoning?

Accepted Answer

Yes, GPT-5.3-Codex by Requesty supports advanced reasoning capabilities.

Question 6

Is GPT-5.3-Codex by Requesty open source?

Accepted Answer

No, GPT-5.3-Codex by Requesty has closed weights. The model is only available through the Requesty API.

Question 7

Does GPT-5.3-Codex support function calling?

Accepted Answer

Yes, GPT-5.3-Codex by Requesty supports tool calling (also known as function calling), allowing it to interact with external tools and APIs during conversations.

Question 8

What is the knowledge cutoff date for GPT-5.3-Codex?

Accepted Answer

GPT-5.3-Codex by Requesty has a knowledge cutoff date of 2025-08-31. This means the model was trained on data available up until that date.

GPT-5.3-Codex API

Input Modalities

Output Modalities

Standard (per 1M tokens)

Caching (per 1M tokens)