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Qwen: Qwen3.5-Flash vs Qwen: Qwen Plus 0728 (thinking)

Head-to-head API cost, context, and performance comparison. Synced at 2:36:04 PM.

Executive Summary

When evaluating Qwen: Qwen3.5-Flash against Qwen: Qwen Plus 0728 (thinking), the pricing structure is a key differentiator. Qwen: Qwen3.5-Flash is approximately 69% more cost-effective per 1 million tokens overall.

However, when looking at raw reasoning capabilities, Qwen: Qwen Plus 0728 (thinking) leads with a statistical ELO score of 1429. For tasks involving complex logic, coding, or instruction-following, developers might prefer Qwen: Qwen Plus 0728 (thinking), provided their budget allows for the API burn rate.

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Raw Technical comparison

Metric
Qwen: Qwen3.5-Flash
Qwen: Qwen Plus 0728 (thinking)
Performance (ELO)
1429
1429
Input Cost / 1M
$0.07
$0.26
Output Cost / 1M
$0.26
$0.78
Context Window
1,000,000 tokens
1,000,000 tokens

Verdict

If you are looking for pure performance and capability, Tie is statistically superior. However, if API burn rate is the primary concern, Qwen: Qwen3.5-Flash wins out aggressively in pricing.

People Also Ask

Is Qwen: Qwen3.5-Flash cheaper than Qwen: Qwen Plus 0728 (thinking)?

Yes. Qwen: Qwen3.5-Flash is cheaper for both input and output generation compared to Qwen: Qwen Plus 0728 (thinking). Exploring alternatives often yields cost reductions.

Which model has the larger context window?

Both models offer an identical context window of 1,000,000 tokens.

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