Compare

DeepSeek V4 Pro vs Qwen 3.5 397B A17B

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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DeepSeek V4 Pro
deepseek/deepseek-v4-pro
Qwen 3.5 397B A17B
alibaba/qwen3.5-397b-a17b
Provider
Deepseek
Alibaba
Family
DeepSeek
Qwen
Modality
text
text
Context window
131,072 tok
262,144 tok
Max output
32,768 tok
32,768 tok
Released
2026-06-08
2026-05-22
License
Open-weight
Open-weight
Input price
$1.74 /1M
$0.600 /1M
Output price
$3.48 /1M
$3.60 /1M
Tools
yes
Streaming
yes
yes
Vision
JSON mode
yes
Reasoning
yes
Prompt caching
Batch API
Try it
Open in playground →
Open in playground →
DeepSeek V4 Pro
deepseek/deepseek-v4-pro
Full spec →

DeepSeek V4 Pro is a high-capability reasoning model from DeepSeek, served via Fireworks infrastructure for production-grade inference.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows
Qwen 3.5 397B A17B
alibaba/qwen3.5-397b-a17b
Full spec →

Alibaba's Qwen 3.5 is a 397B-parameter mixture-of-experts model with 17B active parameters, offering strong reasoning capabilities with efficient inference.

Strengths
  • MoE efficiency: 17B active of 397B
  • Strong reasoning at low cost
  • 262k context
Use cases
Production chatMulti-lingualCost-sensitive reasoning

Compare with another

Claude Opus 5 vs DeepSeek V4 Pro
anthropic/claude-opus-5 · deepseek/deepseek-v4-pro
Claude Opus 5 vs Qwen 3.5 397B A17B
anthropic/claude-opus-5 · alibaba/qwen3.5-397b-a17b
Grok 4.5 vs DeepSeek V4 Pro
xai/grok-4.5 · deepseek/deepseek-v4-pro
Grok 4.5 vs Qwen 3.5 397B A17B
xai/grok-4.5 · alibaba/qwen3.5-397b-a17b
Kimi K3 vs DeepSeek V4 Pro
moonshot/kimi-k3 · deepseek/deepseek-v4-pro
Kimi K3 vs Qwen 3.5 397B A17B
moonshot/kimi-k3 · alibaba/qwen3.5-397b-a17b
Gemini 3.6 Flash vs DeepSeek V4 Pro
google/gemini-3.6-flash · deepseek/deepseek-v4-pro
Gemini 3.6 Flash vs Qwen 3.5 397B A17B
google/gemini-3.6-flash · alibaba/qwen3.5-397b-a17b
GPT-5.6 Sol vs DeepSeek V4 Pro
openai/gpt-5.6-sol · deepseek/deepseek-v4-pro
SWITCH BETWEEN THEM

One key, all 2, one line different.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.aigateway.sh/v1",
    api_key="sk-aig-...",
)

# DeepSeek V4 Pro
client.chat.completions.create(
    model="deepseek/deepseek-v4-pro",
    messages=[{"role":"user","content":"hello"}],
)

# Qwen 3.5 397B A17B
client.chat.completions.create(
    model="alibaba/qwen3.5-397b-a17b",
    messages=[{"role":"user","content":"hello"}],
)
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