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Mistral: Devstral Small 1.1 vs Qwen: Qwen3.5-9B

Head-to-head API cost, context, and performance comparison. Synced at 11:28:37 AM.

Executive Summary

When evaluating Mistral: Devstral Small 1.1 against Qwen: Qwen3.5-9B, the pricing structure is a key differentiator. Qwen: Qwen3.5-9B is approximately 50% more cost-effective per 1 million tokens overall.

However, when looking at raw reasoning capabilities, Qwen: Qwen3.5-9B leads with a statistical ELO score of 1050. For tasks involving complex logic, coding, or instruction-following, developers might prefer Qwen: Qwen3.5-9B, provided their budget allows for the API burn rate.

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Raw Technical comparison

Metric
Mistral: Devstral Small 1.1
Qwen: Qwen3.5-9B
Performance (ELO)
1050
1050
Input Cost / 1M
$0.10
$0.05
Output Cost / 1M
$0.30
$0.15
Context Window
131,072 tokens
256,000 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: Qwen3.5-9B wins out aggressively in pricing.

People Also Ask

Is Mistral: Devstral Small 1.1 cheaper than Qwen: Qwen3.5-9B?

No. Qwen: Qwen3.5-9B is the more cost-effective model, operating at a lower price point per 1 million tokens.

Which model has the larger context window?

The Qwen: Qwen3.5-9B model has the advantage in memory, offering a massive 256,000 token limit for document ingestion.

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