OpenAI Codex Mini vs Gemini 2.5 Pro Preview 06-05
Compare OpenAI Codex Mini by OpenAI against Gemini 2.5 Pro Preview 06-05 by Google AI, context windows of 200K vs 1.0M, tested across 10 shared challenges. Updated June 2026.
Which is better, OpenAI Codex Mini or Gemini 2.5 Pro Preview 06-05?
OpenAI Codex Mini and Gemini 2.5 Pro Preview 06-05 are both competitive models. OpenAI Codex Mini costs $1.5/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 200K vs 1049K tokens. Compare their real outputs side by side below.
Key Differences Between OpenAI Codex Mini and Gemini 2.5 Pro Preview 06-05
OpenAI Codex Mini is made by openai while Gemini 2.5 Pro Preview 06-05 is from google. OpenAI Codex Mini has a 200K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05.
Per 1M tokens
Gemini 2.5 Pro Preview 06-05 wins input (1.2× cheaper)·OpenAI Codex Mini wins output (1.7× cheaper)
No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, bigger context window.
