OpenAIPaid
GPT-5.3-Codex
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
openai/gpt-5.3-codex
Capabilities
🧠Reasoning💻Coding👁️Vision🔧Tools🧩Structured📜Long context
Specifications
Context window
400K tokens
Input price
$1.75/M
Output price
$14.00/M
Provider
OpenAI
Input modalities
text, image, file
Output modalities
text
Pricing
Pay-per-token
Model ID
openai/gpt-5.3-codex
Strengths
- +Strong step-by-step reasoning
- +Tuned for code generation
- +Understands images (vision input)
- +Supports tool / function calling
- +Large 400K-token context window
Considerations
- –No notable limitations for general use
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Use cases
- •Blog Post Creation
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- •Creative Writing Assistance
- •Technical Documentation
- •Marketing Campaigns
- •Language Translation
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