Rival
Sign Up

GPT-5 Codex vs Gemini 2.5 Pro Preview 06-05

Compare GPT-5 Codex by OpenAI against Gemini 2.5 Pro Preview 06-05 by Google AI, tested across 34 shared challenges. Updated April 2026.

Which is better, GPT-5 Codex or Gemini 2.5 Pro Preview 06-05?

GPT-5 Codex and Gemini 2.5 Pro Preview 06-05 are both competitive models. Compare their real outputs side by side below.

Key Differences Between GPT-5 Codex and Gemini 2.5 Pro Preview 06-05

GPT-5 Codex is made by openai while Gemini 2.5 Pro Preview 06-05 is from google.

Our Verdict
GPT-5 Codex
GPT-5 Codex
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

GPT-5 Codex uses 14.6x more emoji

GPT-5 Codex
Gemini 2.5 Pro Preview 06-05
64%Vocabulary51%
17wSentence Length15w
0.38Hedging0.31
2.3Bold4.8
3.5Lists4.1
0.15Emoji0.00
0.49Headings0.98
0.05Transitions0.05
Based on 13 + 20 text responses
vs

Ask them anything yourself

GPT-5 CodexGemini 2.5 Pro Preview 06-05

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
Download the free previewor get all 58 slides for $49
FAQ

Common questions

Keep going
GPT-5 Codex logoClaude Opus 4 logo
GPT-5 Codex vs Claude Opus 4New provider
GPT-5 Codex logoMiniMax M1 logo
GPT-5 Codex vs MiniMax M1New provider
GPT-5 Codex logoAurora Alpha logo
GPT-5 Codex vs Aurora AlphaNew provider