Compare Gemini 1.5 Pro by Google AI against Grok 4.20 Beta by xAI, context windows of 1.0M vs 2.0M, tested across 18 shared challenges. Updated April 2026.
Gemini 1.5 Pro and Grok 4.20 Beta are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 1000K vs 2000K tokens. Compare their real outputs side by side below.
Gemini 1.5 Pro is made by google while Grok 4.20 Beta is from xai. Gemini 1.5 Pro has a 1000K token context window compared to Grok 4.20 Beta's 2000K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $2/M for Grok 4.20 Beta.
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.
Grok 4.20 Beta uses 7.7x more headings
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 4.20 Beta by xAI, context windows of 1.0M vs 2.0M, tested across 18 shared challenges. Updated April 2026.
Gemini 1.5 Pro and Grok 4.20 Beta are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $2/M for Grok 4.20 Beta. Context windows: 1000K vs 2000K tokens. Compare their real outputs side by side below.
Gemini 1.5 Pro is made by google while Grok 4.20 Beta is from xai. Gemini 1.5 Pro has a 1000K token context window compared to Grok 4.20 Beta's 2000K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $2/M for Grok 4.20 Beta.
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.
Grok 4.20 Beta uses 7.7x more headings
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.

18 fights queued
6+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy
18 fights queued
6+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy