Compare Google: Gemma 4 31B by Google AI against Grok Code Fast 1 by xAI, context windows of 262K vs 256K, tested across 45 shared challenges. Updated April 2026.
Google: Gemma 4 31B and Grok Code Fast 1 are both competitive models. Google: Gemma 4 31B costs $0.14/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 262K vs 256K tokens. Compare their real outputs side by side below.
Google: Gemma 4 31B is made by google while Grok Code Fast 1 is from xai. Google: Gemma 4 31B has a 262K token context window compared to Grok Code Fast 1's 256K. On pricing, Google: Gemma 4 31B costs $0.14/M input tokens vs $0.2/M for Grok Code Fast 1.
No community votes yet. On paper, Google: Gemma 4 31B has the edge — bigger model tier, newer.
Google: Gemma 4 31B is 3.8x cheaper per token — worth considering if cost matters.
Google: Gemma 4 31B uses 4.0x 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 Google: Gemma 4 31B by Google AI against Grok Code Fast 1 by xAI, context windows of 262K vs 256K, tested across 45 shared challenges. Updated April 2026.
Google: Gemma 4 31B and Grok Code Fast 1 are both competitive models. Google: Gemma 4 31B costs $0.14/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 262K vs 256K tokens. Compare their real outputs side by side below.
Google: Gemma 4 31B is made by google while Grok Code Fast 1 is from xai. Google: Gemma 4 31B has a 262K token context window compared to Grok Code Fast 1's 256K. On pricing, Google: Gemma 4 31B costs $0.14/M input tokens vs $0.2/M for Grok Code Fast 1.
No community votes yet. On paper, Google: Gemma 4 31B has the edge — bigger model tier, newer.
Google: Gemma 4 31B is 3.8x cheaper per token — worth considering if cost matters.
Google: Gemma 4 31B uses 4.0x 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.

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40 fights queued
28+ 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