GPT-5.3-codex

GPT-5.3-codex is a other model from ChatGPT with a context window of 128K tokens and max output of 128K tokens.

Capabilities

✓ Vision✓ Function Calling✗ Reasoning✓ JSON Schema✗ System Messages✗ Web Search✗ Prompt Caching✗ Audio Input✗ Audio Output

Specifications

Model Keychatgpt/gpt-5.3-codex
ProviderChatGPT
Provider IDchatgpt
ModeOther
Canonical Namegpt-5.3-codex
Context Window128K tokens
Max Output128K tokens

Pricing

TypePer 1K TokensPer 1M Tokens
Input TokensN/AN/A
Output TokensN/AN/A

Benchmarks

Intelligence Index54.0#3
Coding Index53.1#3
GPQA0.9#3
HLE0.4#3
IFBench0.8#5
Time to First Token73.81s#224
SciCode0.5#5
LCR0.7#4
TerminalBench Hard0.5#3
TAU20.9#11

Price Comparison by Provider

Compare prices for GPT-5.3-codex across different providers. The same model may be available through multiple providers at different price points.

Provider
Model Key
Input Price, $
Output Price, $
OpenAIgpt-5.3-chat-latest1.7514.00
GitHub Copilotgithub_copilot/gpt-5.3-codexN/AN/A
ChatGPTchatgpt/gpt-5.3-codexN/AN/A
Azure OpenAIazure/gpt-5.3-codex1.7514.00

All Variants

All available versions, regions, and API endpoints for GPT-5.3-codex.

Model Key
Provider
Mode
Input Price, $
Output Price, $
Context
Max Output
Vision
Functions
azure/gpt-5.3-codexAzure OpenAIOther1.7514.00272K128Kyesyes
chatgpt/gpt-5.3-codexChatGPTOtherN/AN/A128K128Kyesyes
chatgpt/gpt-5.3-codex-sparkChatGPTOtherN/AN/A128K128Kyesyes
github_copilot/gpt-5.3-codexGitHub CopilotOtherN/AN/A128K128Kyesyes
gpt-5.3-chat-latestOpenAIText1.7514.00128K16Kyesyes
gpt-5.3-codexOpenAIOther1.7514.00272K128Kyesyes
← Back to All Models
Select your cookie preferences
We use cookies and similar tools to enhance your experience, provide our services, and make improvements. Approved third parties also use these tools to certain site features. More details available here Cookie Policy