Price Per TokenPrice Per Token
Google
Google
vs
OpenAI
OpenAI

Gemini 3 Flash Preview vs GPT-5.3 Codex

A detailed comparison of pricing, benchmarks, and capabilities

116 out of our 496 tracked models have had a price change in March.

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Key Takeaways

Gemini 3 Flash Preview wins:

  • Cheaper input tokens
  • Cheaper output tokens
  • Larger context window
  • Faster response time
  • Better at math

GPT-5.3 Codex wins:

  • Higher intelligence benchmark
  • Better at coding
Price Advantage
Gemini 3 Flash Preview
Benchmark Advantage
GPT-5.3 Codex
Context Window
Gemini 3 Flash Preview
Speed
Gemini 3 Flash Preview

Pricing Comparison

Benchmark Comparison

Context & Performance

Capabilities

Feature Comparison

FeatureGemini 3 Flash PreviewGPT-5.3 Codex
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGemini 3 Flash PreviewGPT-5.3 Codex
LicenseProprietaryProprietary
AuthorGoogleOpenAI
ReleasedDec 2025Feb 2026

Gemini 3 Flash Preview Modalities

Input
textimagefileaudiovideo
Output
text

GPT-5.3 Codex Modalities

Input
textimage
Output
text

Related Comparisons

Compare Gemini 3 Flash Preview with:

Compare GPT-5.3 Codex with:

See all model comparisons

Frequently Asked Questions

Gemini 3 Flash Preview has cheaper input pricing at $0.50/M tokens. Gemini 3 Flash Preview has cheaper output pricing at $3.00/M tokens.
GPT-5.3 Codex scores higher on coding benchmarks with a score of 53.1, compared to Gemini 3 Flash Preview's score of 37.8.
Gemini 3 Flash Preview has a 1,048,576 token context window, while GPT-5.3 Codex has a 400,000 token context window.
Gemini 3 Flash Preview supports vision. GPT-5.3 Codex supports vision.

Built by @aellman

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