Compare Claude Opus 4.6 by Anthropic against Qwen: Qwen3.5 Flash by Qwen, in 2 community votes, claude opus 4.6 wins 100% of head-to-head duels, context windows of 1.0M vs 1.0M, tested across 53 shared challenges. Updated April 2026.
Claude Opus 4.6 is the better choice overall, winning 100% of 2 blind community votes on Rival. Claude Opus 4.6 costs $5/M input tokens vs $0.1/M for Qwen: Qwen3.5 Flash. Context windows: 1000K vs 1000K tokens. Compare their real outputs side by side below.
Claude Opus 4.6 is made by anthropic while Qwen: Qwen3.5 Flash is from qwen. Claude Opus 4.6 has a 1000K token context window compared to Qwen: Qwen3.5 Flash's 1000K. On pricing, Claude Opus 4.6 costs $5/M input tokens vs $0.1/M for Qwen: Qwen3.5 Flash. In community voting, In 2 community votes, Claude Opus 4.6 wins 100% of head-to-head duels.
In 2 community votes, Claude Opus 4.6 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Pick Claude Opus 4.6. In 2 blind votes, Claude Opus 4.6 wins 100% of the time. That's not luck.
Qwen: Qwen3.5 Flash is 63x cheaper per token — worth considering if cost matters.
Claude Opus 4.6 uses 8.1x 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 Claude Opus 4.6 by Anthropic against Qwen: Qwen3.5 Flash by Qwen, in 2 community votes, claude opus 4.6 wins 100% of head-to-head duels, context windows of 1.0M vs 1.0M, tested across 53 shared challenges. Updated April 2026.
Claude Opus 4.6 is the better choice overall, winning 100% of 2 blind community votes on Rival. Claude Opus 4.6 costs $5/M input tokens vs $0.1/M for Qwen: Qwen3.5 Flash. Context windows: 1000K vs 1000K tokens. Compare their real outputs side by side below.
Claude Opus 4.6 is made by anthropic while Qwen: Qwen3.5 Flash is from qwen. Claude Opus 4.6 has a 1000K token context window compared to Qwen: Qwen3.5 Flash's 1000K. On pricing, Claude Opus 4.6 costs $5/M input tokens vs $0.1/M for Qwen: Qwen3.5 Flash. In community voting, In 2 community votes, Claude Opus 4.6 wins 100% of head-to-head duels.
In 2 community votes, Claude Opus 4.6 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Pick Claude Opus 4.6. In 2 blind votes, Claude Opus 4.6 wins 100% of the time. That's not luck.
Qwen: Qwen3.5 Flash is 63x cheaper per token — worth considering if cost matters.
Claude Opus 4.6 uses 8.1x 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.

48 fights queued
36+ more head-to-head results. Free. Not a trick.
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48 fights queued
36+ 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