xAI: Grok 4 Fast (free) vs Qwen: Qwen3.5 397B A17B
Compare xAI: Grok 4 Fast (free) by xAI against Qwen: Qwen3.5 397B A17B 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 397B A17B?
xAI: Grok 4 Fast (free) and Qwen: Qwen3.5 397B A17B are both competitive models. xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.6/M for Qwen: Qwen3.5 397B A17B. 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 397B A17B
xAI: Grok 4 Fast (free) is made by xai while Qwen: Qwen3.5 397B A17B is from qwen. xAI: Grok 4 Fast (free) has a 2000K token context window compared to Qwen: Qwen3.5 397B A17B's 262K. On pricing, xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.6/M for Qwen: Qwen3.5 397B A17B.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Style Comparison
Qwen: Qwen3.5 397B A17B uses 22.8x more emoji
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.
