DeepSeek Prover V2 vs xAI: Grok 4 Fast (free)
Compare DeepSeek Prover V2 by DeepSeek against xAI: Grok 4 Fast (free) by xAI, context windows of 164K vs 2.0M, tested across 6 shared challenges. Updated April 2026.
Which is better, DeepSeek Prover V2 or xAI: Grok 4 Fast (free)?
DeepSeek Prover V2 and xAI: Grok 4 Fast (free) are both competitive models. DeepSeek Prover V2 costs $0/M input tokens vs $0/M for xAI: Grok 4 Fast (free). Context windows: 164K vs 2000K tokens. Compare their real outputs side by side below.
Key Differences Between DeepSeek Prover V2 and xAI: Grok 4 Fast (free)
DeepSeek Prover V2 is made by deepseek while xAI: Grok 4 Fast (free) is from xai. DeepSeek Prover V2 has a 164K token context window compared to xAI: Grok 4 Fast (free)'s 2000K. On pricing, DeepSeek Prover V2 costs $0/M input tokens vs $0/M for xAI: Grok 4 Fast (free).
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Style Comparison
xAI: Grok 4 Fast (free) uses 56.3x more hedging
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178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
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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.
