GPT-5.1-Codex vs Qwen: Qwen3.5 Flash
Compare GPT-5.1-Codex by OpenAI against Qwen: Qwen3.5 Flash by Qwen, context windows of 400K vs 1.0M, tested across 52 shared challenges. Updated April 2026.
Which is better, GPT-5.1-Codex or Qwen: Qwen3.5 Flash?
GPT-5.1-Codex and Qwen: Qwen3.5 Flash are both competitive models. GPT-5.1-Codex costs $1.25/M input tokens vs $0.1/M for Qwen: Qwen3.5 Flash. Context windows: 400K vs 1000K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1-Codex and Qwen: Qwen3.5 Flash
GPT-5.1-Codex is made by openai while Qwen: Qwen3.5 Flash is from qwen. GPT-5.1-Codex has a 400K token context window compared to Qwen: Qwen3.5 Flash's 1000K. On pricing, GPT-5.1-Codex costs $1.25/M input tokens vs $0.1/M for Qwen: Qwen3.5 Flash.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Qwen: Qwen3.5 Flash is 25x cheaper per token — worth considering if cost matters.
Style Comparison
Qwen: Qwen3.5 Flash uses 2.5x 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.
