GPT-5.3-Codex
DeprecatedAn OpenAI model with a 400K-token context window, image input and tool calling. On the OpenAI API since February 24, 2026, now deprecated.
Access details: OpenAI API
The model ID to use in API requests.
gpt-5.3-codexUpdated Sep 23, 2026
Capabilities & limits
- Context window
- 400K
- Maximum output
- 128K
- Image input
- Supported
- Tool calling
- Supported
- Structured output
- Supported
Pricing
USD / 1M tokens- Input
- $1.75
- Output
- $14.00
Standard rates per million tokens. Discounts and long-context rates, where offered, are on OpenAI's pricing page.
Full rate card 3 rates
All prices in USD.
Standard input
$1.75 per 1M tokensStandard output
$14.00 per 1M tokensCached input
$0.175 per 1M tokensListed in the pricing page specialized models table (Codex category); no Batch, Flex or Fast rates are listed for it.
Price history
Sep 23, 2026
Input $1.75 per million tokens
Sep 23, 2026
Output $14.00 per million tokens
Technical details
- Parameters
- Not published
- Active parameters
- Not published
- Architecture
- Not published
- Training / knowledge cutoff
- Aug 31, 2025
- Input modalities
- Text, image
- Output modalities
- Text
From OpenAI
Official announcement ↗Release & lifecycle
- First available
- Feb 24, 2026
- available
- As of Sep 23, 2026
- deprecated
- As of Oct 20, 2026