Compare Gemini 1.5 Pro by Google AI against Grok Code Fast 1 by xAI, context windows of 1.0M vs 256K, tested across 19 shared challenges. Updated April 2026.
Gemini 1.5 Pro and Grok Code Fast 1 are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 1000K vs 256K tokens. Compare their real outputs side by side below.
Gemini 1.5 Pro is made by google while Grok Code Fast 1 is from xai. Gemini 1.5 Pro has a 1000K token context window compared to Grok Code Fast 1's 256K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $0.2/M for Grok Code Fast 1.
No community votes yet. On paper, Gemini 1.5 Pro has the edge — bigger model tier, bigger context window.
Grok Code Fast 1 is 7.0x cheaper per token — worth considering if cost matters.
Grok Code Fast 1 uses 6.0x more emoji
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.

Compare Gemini 1.5 Pro by Google AI against Grok Code Fast 1 by xAI, context windows of 1.0M vs 256K, tested across 19 shared challenges. Updated April 2026.
Gemini 1.5 Pro and Grok Code Fast 1 are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 1000K vs 256K tokens. Compare their real outputs side by side below.
Gemini 1.5 Pro is made by google while Grok Code Fast 1 is from xai. Gemini 1.5 Pro has a 1000K token context window compared to Grok Code Fast 1's 256K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $0.2/M for Grok Code Fast 1.
No community votes yet. On paper, Gemini 1.5 Pro has the edge — bigger model tier, bigger context window.
Grok Code Fast 1 is 7.0x cheaper per token — worth considering if cost matters.
Grok Code Fast 1 uses 6.0x more emoji
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.
