Gemini 3.1 Pro Preview vs GPT-5.3-Codex
Compare Gemini 3.1 Pro Preview by Google AI against GPT-5.3-Codex by OpenAI, in 5 community votes, gemini 3.1 pro preview wins 80% of head-to-head duels, context windows of 1.0M vs 400K, tested across 53 shared challenges. Updated April 2026.
Which is better, Gemini 3.1 Pro Preview or GPT-5.3-Codex?
Gemini 3.1 Pro Preview is the better choice overall, winning 80% of 5 blind community votes on Rival. Gemini 3.1 Pro Preview costs $2/M input tokens vs $1.75/M for GPT-5.3-Codex. Context windows: 1049K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 3.1 Pro Preview and GPT-5.3-Codex
Gemini 3.1 Pro Preview is made by google while GPT-5.3-Codex is from openai. Gemini 3.1 Pro Preview has a 1049K token context window compared to GPT-5.3-Codex's 400K. On pricing, Gemini 3.1 Pro Preview costs $2/M input tokens vs $1.75/M for GPT-5.3-Codex. In community voting, In 5 community votes, Gemini 3.1 Pro Preview wins 80% of head-to-head duels.
In 5 community votes, Gemini 3.1 Pro Preview wins 80% of head-to-head duels. Gemini 3.1 Pro Preview leads in Image Generation. Based on blind community voting from the Rival open dataset of 5+ human preference judgments for this pair.
Pick Gemini 3.1 Pro Preview. In 5 blind votes, Gemini 3.1 Pro Preview wins 80% of the time. That's not luck.
Gemini 3.1 Pro Preview particularly excels in Image Generation.
Style Comparison
GPT-5.3-Codex uses 15.8x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
