GPT-4o (Omni) vs Qwen: Qwen3.5 Plus 2026-02-15

Compare GPT-4o (Omni) by OpenAI against Qwen: Qwen3.5 Plus 2026-02-15 by Qwen, context windows of 128K vs 1.0M, tested across 52 shared challenges. Updated April 2026.

Which is better, GPT-4o (Omni) or Qwen: Qwen3.5 Plus 2026-02-15?

GPT-4o (Omni) and Qwen: Qwen3.5 Plus 2026-02-15 are both competitive models. GPT-4o (Omni) costs $2.5/M input tokens vs $0.4/M for Qwen: Qwen3.5 Plus 2026-02-15. Context windows: 128K vs 1000K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4o (Omni) and Qwen: Qwen3.5 Plus 2026-02-15

GPT-4o (Omni) is made by openai while Qwen: Qwen3.5 Plus 2026-02-15 is from qwen. GPT-4o (Omni) has a 128K token context window compared to Qwen: Qwen3.5 Plus 2026-02-15's 1000K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $0.4/M for Qwen: Qwen3.5 Plus 2026-02-15.

Our Verdict
GPT-4o (Omni)
GPT-4o (Omni)
Qwen: Qwen3.5 Plus 2026-02-15
Qwen: Qwen3.5 Plus 2026-02-15

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 Plus 2026-02-15 is 4.2x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
98%

Qwen: Qwen3.5 Plus 2026-02-15 uses 4.0x more emoji

GPT-4o (Omni)
Qwen: Qwen3.5 Plus 2026-02-15
54%Vocabulary54%
18wSentence Length18w
0.72Hedging0.51
7.3Bold5.3
5.6Lists2.9
0.03Emoji0.10
1.40Headings0.75
0.26Transitions0.09
Based on 24 + 23 text responses
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GPT-4o (Omni)Qwen: Qwen3.5 Plus 2026-02-15

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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