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Qwen3.5 Plus (02-15) vs DeepSeek V4 Flash

At a glance

Qwen3.5 Plus variant from February 2025 — optimized for balanced performance.

1M ctx$0.26/$1.56 per M

Efficiency-optimized DeepSeek V4 at 284B total / 13B active for fast, high-throughput inference.

1.0M ctx$0.09/$0.19 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper80%
Specs
1M
Context
66K
Max output
Feb 2026
Released
1.0M
Context
16K
Max output
Apr 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$0.26/M tokens
Output$1.56/M tokens
Live pricing, shown before you run
Input64%$0.09/M tokens
Output88%$0.19/M tokens
Cache read$0.02/M tokens
Chat with Qwen3.5 Plus (02-15)Go to model
Chat with DeepSeek V4 FlashGo to model
Frequently Asked Questions: Qwen3.5 Plus (02-15) vs DeepSeek V4 Flash▼

Which is better, Qwen3.5 Plus (02-15) or DeepSeek V4 Flash?

▼

Both Qwen3.5 Plus (02-15) and DeepSeek V4 Flash are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Qwen3.5 Plus (02-15) or DeepSeek V4 Flash?

▼

DeepSeek V4 Flash has a lower blended cost. Qwen3.5 Plus (02-15): $0.26 input / $1.56 output. DeepSeek V4 Flash: $0.09 input / $0.19 output.

Which has a larger context window, Qwen3.5 Plus (02-15) or DeepSeek V4 Flash?

▼

DeepSeek V4 Flash has a larger context window: Qwen3.5 Plus (02-15) supports 1M tokens vs DeepSeek V4 Flash at 1M tokens.

Do both Qwen3.5 Plus (02-15) and DeepSeek V4 Flash support vision?

▼

Qwen3.5 Plus (02-15) supports vision/image input, but DeepSeek V4 Flash does not.

What are the key differences between Qwen3.5 Plus (02-15) and DeepSeek V4 Flash?

▼

Key differences: DeepSeek V4 Flash is significantly cheaper; only Qwen3.5 Plus (02-15) supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Qwen3.5 Plus (02-15) and DeepSeek V4 Flash for free on idapt.app to see which performs better for your specific needs.

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