What is the difference between Claude Opus 4 and Qwen3.5 Plus 2026-02-15?

Claude Opus 4 is developed by Anthropic while Qwen3.5 Plus 2026-02-15 is developed by Qwen. Claude Opus 4 has a 200K token context window vs Qwen3.5 Plus 2026-02-15's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Qwen3.5 Plus 2026-02-15?

It depends on your use case. Claude Opus 4 and Qwen3.5 Plus 2026-02-15 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Claude Opus 4 cost compared to Qwen3.5 Plus 2026-02-15?

Claude Opus 4 costs $15/M input tokens and Qwen3.5 Plus 2026-02-15 costs $0.4/M input tokens. Qwen3.5 Plus 2026-02-15 is $14.60/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Opus 4 and Qwen3.5 Plus 2026-02-15 on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Qwen3.5 Plus 2026-02-15 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Feb 2026

Claude Opus 4vsQwen3.5 Plus 2026-02-15

Qwen3.5 Plus 2026-02-15 is cheaper than Claude Opus 4 at $0.4/M vs $15/M input tokens.

Claude Opus 4 and Qwen3.5 Plus 2026-02-15 compared across 53 shared prompts
Spec	Claude Opus 4	Qwen3.5 Plus 2026-02-15
Input price	$15/M tokens	$0.4/M tokens
Output price	$75/M tokens	$2.4/M tokens
Context window	200K tokens	1.0M tokens
Parameters	Not disclosed	Not disclosed
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	May 2025	Feb 2026
GPQA Diamond	74.9% (w/o extended thinking)	88.4%