Gemini 2.5 Flash Preview (thinking) vs xAI: Grok 4
Compare Gemini 2.5 Flash Preview (thinking) by Google AI against xAI: Grok 4 by xAI, context windows of 1.0M vs 256K, tested across 20 shared challenges. Updated April 2026.
Which is better, Gemini 2.5 Flash Preview (thinking) or xAI: Grok 4?
Gemini 2.5 Flash Preview (thinking) and xAI: Grok 4 are both competitive models. Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens vs $3/M for xAI: Grok 4. Context windows: 1049K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 2.5 Flash Preview (thinking) and xAI: Grok 4
Gemini 2.5 Flash Preview (thinking) is made by google while xAI: Grok 4 is from xai. Gemini 2.5 Flash Preview (thinking) has a 1049K token context window compared to xAI: Grok 4's 256K. On pricing, Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens vs $3/M for xAI: Grok 4.
No community votes yet. On paper, xAI: Grok 4 has the edge — bigger model tier, newer.
Gemini 2.5 Flash Preview (thinking) is 4.3x cheaper per token — worth considering if cost matters.
Style Comparison
xAI: Grok 4 uses 7.0x more emoji
vs
Ask 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.
