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Claude Haiku 4.5 vs Qwen3.5-Plus

SpecClaude Haiku 4.5Qwen3.5-Plus
Respan Index19.5 (#121)19.4 (#122)
Blended price per 1M$2$0.823
Context window200K1M
Input / output per 1M$1 / $5$0.36 / $2.21
Max output64K-
Inputtext, visiontext, vision
Released2025-10-152026-02-15

Respan Index by category

Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.

CategoryClaude Haiku 4.5Qwen3.5-Plus
Coding6.1 Claude Haiku 4.57.2* Qwen3.5-Plus
Agents16.3 Claude Haiku 4.54.8 Qwen3.5-Plus
Reasoning21.2 Claude Haiku 4.527.7 Qwen3.5-Plus
Knowledge & language13.2 Claude Haiku 4.525.4 Qwen3.5-Plus
Human preference48.6 Claude Haiku 4.546.2* Qwen3.5-Plus

* Estimated: no published scores in that category. How the Respan Index works

Benchmarks both report

Qwen3.5-Plus leads on 3 of the 6 benchmarks both report. Higher is better. Each score links to where it was published.

BenchmarkClaude Haiku 4.5Qwen3.5-Plus
Chess Puzzles (Epoch AI)8%8%
GPQA Diamond71.2%84.8%
OTIS Mock AIME 2024-2025 (Epoch AI)66.7%86.7%
SAGE (Vals AI)31.8%30.4%
SimpleQA Verified13.2%25.4%
Vending-Bench 2 (Andon Labs)458.890.54

FAQ

Is Claude Haiku 4.5 better than Qwen3.5-Plus?

Claude Haiku 4.5 scores 19.5 on the Respan Index (#121), ahead of Qwen3.5-Plus at 19.4 (#122). Qwen3.5-Plus leads on 3 of the 6 benchmarks both report.

Which is cheaper, Claude Haiku 4.5 or Qwen3.5-Plus?

Claude Haiku 4.5 lists at $1 input and $5 output per 1M tokens; Qwen3.5-Plus at $0.36 and $2.21. Qwen3.5-Plus is 2.4x cheaper per token at list price.

Which has the larger context window?

Claude Haiku 4.5 accepts 200K tokens and Qwen3.5-Plus 1M tokens.

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