Compare Grok 4.20 Beta by xAI against Mistral Small 4 by Mistral AI, context windows of 2.0M vs 262K, tested across 53 shared challenges. Updated April 2026.
Grok 4.20 Beta and Mistral Small 4 are both competitive models. Grok 4.20 Beta costs $2/M input tokens vs $0.15/M for Mistral Small 4. Context windows: 2000K vs 262K tokens. Compare their real outputs side by side below.
Grok 4.20 Beta is made by xai while Mistral Small 4 is from mistral. Grok 4.20 Beta has a 2000K token context window compared to Mistral Small 4's 262K. On pricing, Grok 4.20 Beta costs $2/M input tokens vs $0.15/M for Mistral Small 4.
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, bigger context window, major provider backing.
Mistral Small 4 is 10x cheaper per token — worth considering if cost matters.
Mistral Small 4 uses 19.0x 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 Grok 4.20 Beta by xAI against Mistral Small 4 by Mistral AI, context windows of 2.0M vs 262K, tested across 53 shared challenges. Updated April 2026.
Grok 4.20 Beta and Mistral Small 4 are both competitive models. Grok 4.20 Beta costs $2/M input tokens vs $0.15/M for Mistral Small 4. Context windows: 2000K vs 262K tokens. Compare their real outputs side by side below.
Grok 4.20 Beta is made by xai while Mistral Small 4 is from mistral. Grok 4.20 Beta has a 2000K token context window compared to Mistral Small 4's 262K. On pricing, Grok 4.20 Beta costs $2/M input tokens vs $0.15/M for Mistral Small 4.
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, bigger context window, major provider backing.
Mistral Small 4 is 10x cheaper per token — worth considering if cost matters.
Mistral Small 4 uses 19.0x 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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48 fights queued
36+ 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