xAI: Grok 4 Fast (free) vs Qwen: Qwen3.5 27B
Compare xAI: Grok 4 Fast (free) by xAI against Qwen: Qwen3.5 27B by Qwen, context windows of 2.0M vs 262K, tested across 34 shared challenges. Updated April 2026.
Which is better, xAI: Grok 4 Fast (free) or Qwen: Qwen3.5 27B?
xAI: Grok 4 Fast (free) and Qwen: Qwen3.5 27B are both competitive models. xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.3/M for Qwen: Qwen3.5 27B. Context windows: 2000K vs 262K tokens. Compare their real outputs side by side below.
Key Differences Between xAI: Grok 4 Fast (free) and Qwen: Qwen3.5 27B
xAI: Grok 4 Fast (free) is made by xai while Qwen: Qwen3.5 27B is from qwen. xAI: Grok 4 Fast (free) has a 2000K token context window compared to Qwen: Qwen3.5 27B's 262K. On pricing, xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.3/M for Qwen: Qwen3.5 27B.
No community votes yet. On paper, xAI: Grok 4 Fast (free) has the edge — bigger model tier, bigger context window, major provider backing.
Style Comparison
vsAsk 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.
