token.app › Compare › Qwen3.5 Plus 2026-02-15 vs DeepSeek V4 Flash 0731

Qwen3.5 Plus 2026-02-15 vs DeepSeek V4 Flash 0731

DeepSeek V4 Flash 0731 leads on 2 of 2 shared benchmarks. Qwen3.5 Plus 2026-02-15 is 1.1× cheaper per token on a blended 3:1 basis. DeepSeek V4 Flash 0731 accepts the larger context window (1.0M).

Head to head
Blended price uses a 3:1 input:output mix
Qwen3.5 Plus 2026-02-15DeepSeek V4 Flash 0731
ProviderAlibabaDeepSeek
Input $/1M$0.260$0.440
Output $/1M$1.56$1.32
Blended $/1M$0.585$0.660
Context window1M1.0M
Max output66K131K
ReleasedFeb 2026Jul 2026
LicenceProprietaryOpen weights
GPQA Diamond 84.8% 91.0%
OTIS Mock AIME 86.7% 94.4%
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Qwen3.5 Plus 2026-02-15 if…
  • Costs less per token — $0.585 vs $0.660 blended
Choose DeepSeek V4 Flash 0731 if…
  • Higher GPQA Diamond (91.0% vs 84.8%)
  • Higher OTIS Mock AIME (94.4% vs 86.7%)
  • Larger context window (1.0M)
  • Open weights — self-hostable
  • Newer model (released Jul 2026)
FAQ
Which is better, Qwen3.5 Plus 2026-02-15 or DeepSeek V4 Flash 0731?
Across the 2 benchmarks both models have independently-run scores for, Qwen3.5 Plus 2026-02-15 leads on 0 and DeepSeek V4 Flash 0731 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is Qwen3.5 Plus 2026-02-15 cheaper than DeepSeek V4 Flash 0731?
Qwen3.5 Plus 2026-02-15 is cheaper: $0.585 versus $0.660 per million tokens blended at 3:1 input:output. Input alone: $0.260 vs $0.440. Output alone: $1.56 vs $1.32.
What context windows do Qwen3.5 Plus 2026-02-15 and DeepSeek V4 Flash 0731 have?
Qwen3.5 Plus 2026-02-15: 1,000,000 tokens. DeepSeek V4 Flash 0731: 1,048,576 tokens.
Who makes Qwen3.5 Plus 2026-02-15 and DeepSeek V4 Flash 0731?
Qwen3.5 Plus 2026-02-15 is made by Alibaba. DeepSeek V4 Flash 0731 is made by DeepSeek.
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