Cracked AI Engineering

GPT-5-Codex vs Gemini 2.0 Flash

Gemini 2.0 Flash offers 1.0M tokens context vs 128K tokens, GPT-5-Codex includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.

Quick Overview

GPT-5-Codex

GitHub Copilot

128K tokens context • Pricing not available

View full specifications →

Gemini 2.0 Flash

GitHub Copilot

1.0M tokens context • Pricing not available

View full specifications →

Detailed Comparison

Specification
GPT-5-Codex
Gemini 2.0 Flash
Provider
GitHub Copilot
GitHub Copilot
Context Window
128K tokens
1.0M tokens
Max Output Tokens
64K tokens
8K tokens
Release Date
Sep 2025
Dec 2024

Capabilities

Capability
GPT-5-Codex
Gemini 2.0 Flash
Text Generation
Vision
Function Calling
Advanced Reasoning
Audio Input
Video Understanding
File Attachments

Which Model Should You Choose?

Choose GPT-5-Codex if:

  • • You need advanced reasoning

Choose Gemini 2.0 Flash if:

  • • You need a larger context window