Skip to content
  • Models
  • Rankings
Sign Up
Sign Up
OpenRouterOpenRouter
© 2026 OpenRouter, Inc

Product

  • Chat
  • Rankings
  • Benchmarks
  • Apps
  • Discover
  • Models
  • Collections
  • Providers
  • Pricing
  • Business
  • Enterprise
  • Labs

Company

  • About
  • Blog
  • Careers
    Hiring
  • Privacy
  • Terms of Service
  • Trust Center
  • Support
  • Works With OR
  • Data
  • Brand

Developer

  • Documentation
  • API Reference
  • Developer Platform
  • Status

Connect

  • Discord
  • GitHub
  • LinkedIn
  • X
  • YouTube
  1. Home
  2. /
  3. Compare

Gemini 3 Pro Preview vs GPT-5 Codex: side-by-side summary

Gemini 3 Pro Preview and GPT-5 Codex are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Gemini 3 Pro Preview, from Google, has a 1,048,576-token context window and is priced by the provider serving it on OpenRouter.

GPT-5 Codex, from OpenAI, has a 400,000-token context window and is priced by the provider serving it on OpenRouter.

Context window
  • Gemini 3 Pro Preview: 1,048,576 tokens
  • GPT-5 Codex: 400,000 tokens
Price
  • Gemini 3 Pro Preview: Pricing varies by provider
  • GPT-5 Codex: Pricing varies by provider
Provided by
  • Gemini 3 Pro Preview: Google
  • GPT-5 Codex: OpenAI
  • Gemini 3 Pro Preview model details, providers and pricing
  • GPT-5 Codex model details, providers and pricing