Compare ChatGPT-4o (March 2025) by OpenAI against Qwen3 Coder Flash by Qwen, context windows of 128K vs 128K, tested across 32 shared challenges. Updated April 2026.
ChatGPT-4o (March 2025) and Qwen3 Coder Flash are both competitive models. ChatGPT-4o (March 2025) costs $5/M input tokens vs $0.3/M for Qwen3 Coder Flash. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
ChatGPT-4o (March 2025) is made by openai while Qwen3 Coder Flash is from qwen. ChatGPT-4o (March 2025) has a 128K token context window compared to Qwen3 Coder Flash's 128K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $0.3/M for Qwen3 Coder Flash.
No community votes yet. On paper, ChatGPT-4o (March 2025) has the edge — bigger model tier, major provider backing.
Qwen3 Coder Flash is 10x cheaper per token — worth considering if cost matters.
ChatGPT-4o (March 2025) uses 94.5x 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 ChatGPT-4o (March 2025) by OpenAI against Qwen3 Coder Flash by Qwen, context windows of 128K vs 128K, tested across 32 shared challenges. Updated April 2026.
ChatGPT-4o (March 2025) and Qwen3 Coder Flash are both competitive models. ChatGPT-4o (March 2025) costs $5/M input tokens vs $0.3/M for Qwen3 Coder Flash. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
ChatGPT-4o (March 2025) is made by openai while Qwen3 Coder Flash is from qwen. ChatGPT-4o (March 2025) has a 128K token context window compared to Qwen3 Coder Flash's 128K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $0.3/M for Qwen3 Coder Flash.
No community votes yet. On paper, ChatGPT-4o (March 2025) has the edge — bigger model tier, major provider backing.
Qwen3 Coder Flash is 10x cheaper per token — worth considering if cost matters.
ChatGPT-4o (March 2025) uses 94.5x 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.
