Gemini 2.5 Flash Preview (thinking) vs GPT-4o mini
Compare Gemini 2.5 Flash Preview (thinking) by Google AI against GPT-4o mini by OpenAI, context windows of 1.0M vs 128K, tested across 20 shared challenges. Updated April 2026.
Which is better, Gemini 2.5 Flash Preview (thinking) or GPT-4o mini?
Gemini 2.5 Flash Preview (thinking) and GPT-4o mini are both competitive models. Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens vs $0.15/M for GPT-4o mini. Context windows: 1049K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 2.5 Flash Preview (thinking) and GPT-4o mini
Gemini 2.5 Flash Preview (thinking) is made by google while GPT-4o mini is from openai. Gemini 2.5 Flash Preview (thinking) has a 1049K token context window compared to GPT-4o mini's 128K. On pricing, Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens vs $0.15/M for GPT-4o mini.
No community votes yet. On paper, Gemini 2.5 Flash Preview (thinking) has the edge — bigger model tier, newer, bigger context window.
GPT-4o mini is 5.8x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4o mini uses 103.1x more headings
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.
