GitHub Copilot's GPT-5-Codex AI model offers developers a powerful tool with a context window of 128,000 tokens and advanced capabilities in text input, vision, function calling, and reasoning. With an output limit of 64,000 tokens and training data up to 2024, this model is a game-changer for those looking to enhance their coding workflows with cutting-edge AI technology.

Key Specifications

Context Window

128K tokens

Max Output Tokens

64K tokens

Capabilities

Text Generation
Vision
Function Calling
Advanced Reasoning

Additional Details

Provider: GitHub Copilot
Release Date: September 15, 2025
Advanced Reasoning: Supported
Supported Input Types: text, image

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