Claude Sonnet 4.5 vs Qwen3.5 9B

Compare Claude Sonnet 4.5 by Anthropic against Qwen3.5 9B by Qwen, context windows of 200K vs 262K, tested across 40 shared challenges. Updated March 2026.

Which is better, Claude Sonnet 4.5 or Qwen3.5 9B?

Claude Sonnet 4.5 and Qwen3.5 9B are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $0.1/M for Qwen3.5 9B. Context windows: 200K vs 262K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Sonnet 4.5 and Qwen3.5 9B

Claude Sonnet 4.5 is made by anthropic while Qwen3.5 9B is from qwen. Claude Sonnet 4.5 has a 200K token context window compared to Qwen3.5 9B's 262K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $0.1/M for Qwen3.5 9B.

Our Verdict
Claude Sonnet 4.5
Claude Sonnet 4.5
Qwen3.5 9B
Qwen3.5 9BRunner-up

No community votes yet. On paper, Claude Sonnet 4.5 has the edge — bigger model tier, major provider backing.

Qwen3.5 9B is 100x cheaper per token — worth considering if cost matters.

Too close to call
FAQ

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