DeepSeek V3 vs FLUX.1 Dev

Compare DeepSeek V3 and FLUX.1 Dev: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.

Updated 2026-05-21 · By Abhishek Raj · Our methodology

All DeepSeek models All Black Forest Labs models What is an LLM API? Python Quickstart What is inference?
Feature DeepSeek V3 FLUX.1 Dev
CategoryOpen SourceImage
Parameters671B (37B active)12B
Context Window128KN/A
Input Price$0.05/1M tokens$0.003/image/1M tokens
Output Price$0.09/1M tokensN/A/1M tokens
Latency~400ms~3s

Choose DeepSeek V3 when:

  • ✓ API response generation
  • ✓ High-volume processing
  • ✓ Code
Key Strengths:

MoE efficiency, Strong coding, Good structured output

Choose FLUX.1 Dev when:

  • ✓ Custom styles
  • ✓ Fine-tuned imagery
  • ✓ Development
Key Strengths:

Fine-tunable, Good quality, Open weights

Verdict: DeepSeek V3 vs FLUX.1 Dev

For cost efficiency, FLUX.1 Dev wins at $0.003/image/1M input tokens. For speed, FLUX.1 Dev is faster at ~3s. DeepSeek V3 excels at API response generation while FLUX.1 Dev is better for Custom styles. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

DeepSeek V3 costs $0.05/1M input tokens and $0.09/1M output tokens. FLUX.1 Dev costs $0.003/image input and N/A output. FLUX.1 Dev is 16.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

DeepSeek V3 has a 128K context window with ~400ms latency. FLUX.1 Dev offers N/A context at ~3s. DeepSeek V3 has the larger context window.

Best For

DeepSeek V3 (Open Source) is optimized for: API response generation, High-volume processing, Code. FLUX.1 Dev (Image) works best for: Custom styles, Fine-tuned imagery, Development.

Try Both on XALEN

Both models are available through XALEN's OpenAI-compatible API. Switch between them by changing the model parameter:

from xalen import XALEN

client = XALEN(api_key="xln_test_YOUR_KEY")

# Use DeepSeek V3
response_a = client.chat.completions.create(
    model="deepseek-v3",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use FLUX.1 Dev
response_b = client.chat.completions.create(
    model="flux-1-dev",
    messages=[{"role": "user", "content": "Your question here"}]
)

Start Building with XALEN

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Get API Key Try in Playground

Frequently Asked Questions

Which is better, DeepSeek V3 or FLUX.1 Dev?

DeepSeek V3 (Open Source, 671B (37B active)) offers MoE efficiency. FLUX.1 Dev (Image, 12B) offers Fine-tunable. Choose DeepSeek V3 for API response generation or FLUX.1 Dev for Custom styles.

How much does DeepSeek V3 cost vs FLUX.1 Dev?

DeepSeek V3: $0.05/1M input, $0.09/1M output. FLUX.1 Dev: $0.003/image/1M input, N/A/1M output. Both available on XALEN with batch processing at 50% discount.

Can I use both models on XALEN?

Yes. XALEN provides 200+ models through a single OpenAI-compatible API. Switch between DeepSeek V3 and FLUX.1 Dev by changing the model parameter. No code changes needed.

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Last updated: 2026-05-21. Pricing and specifications may change. Check pricing page for latest rates.