Compare xAI: Grok 4 Fast (free) by xAI against Qwen3 30B A3B Thinking 2507 by Qwen, context windows of 2.0M vs 262K, tested across 35 shared challenges. Updated April 2026.
xAI: Grok 4 Fast (free) and Qwen3 30B A3B Thinking 2507 are both competitive models. xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.071/M for Qwen3 30B A3B Thinking 2507. Context windows: 2000K vs 262K tokens. Compare their real outputs side by side below.
xAI: Grok 4 Fast (free) is made by xai while Qwen3 30B A3B Thinking 2507 is from qwen. xAI: Grok 4 Fast (free) has a 2000K token context window compared to Qwen3 30B A3B Thinking 2507's 262K. On pricing, xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.071/M for Qwen3 30B A3B Thinking 2507.
No community votes yet. On paper, xAI: Grok 4 Fast (free) has the edge — bigger context window, major provider backing.
Qwen3 30B A3B Thinking 2507 uses 67.9x 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 xAI: Grok 4 Fast (free) by xAI against Qwen3 30B A3B Thinking 2507 by Qwen, context windows of 2.0M vs 262K, tested across 35 shared challenges. Updated April 2026.
xAI: Grok 4 Fast (free) and Qwen3 30B A3B Thinking 2507 are both competitive models. xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.071/M for Qwen3 30B A3B Thinking 2507. Context windows: 2000K vs 262K tokens. Compare their real outputs side by side below.
xAI: Grok 4 Fast (free) is made by xai while Qwen3 30B A3B Thinking 2507 is from qwen. xAI: Grok 4 Fast (free) has a 2000K token context window compared to Qwen3 30B A3B Thinking 2507's 262K. On pricing, xAI: Grok 4 Fast (free) costs $0/M input tokens vs $0.071/M for Qwen3 30B A3B Thinking 2507.
No community votes yet. On paper, xAI: Grok 4 Fast (free) has the edge — bigger context window, major provider backing.
Qwen3 30B A3B Thinking 2507 uses 67.9x 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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35 fights queued
23+ 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