Mistral Medium 3 vs FLUX.1 Dev

Compare Mistral Medium 3 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

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Feature Mistral Medium 3 FLUX.1 Dev
CategoryOpen SourceImage
Parameters70B12B
Context Window128KN/A
Input Price$0.04/1M tokens$0.003/image/1M tokens
Output Price$0.08/1M tokensN/A/1M tokens
Latency~300ms~3s

Choose Mistral Medium 3 when:

  • ✓ Production APIs
  • ✓ Template filling
  • ✓ General purpose
Key Strengths:

Good balance, Strong function calling, Reliable

Choose FLUX.1 Dev when:

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

Fine-tunable, Good quality, Open weights

Verdict: Mistral Medium 3 vs FLUX.1 Dev

For cost efficiency, FLUX.1 Dev wins at $0.003/image/1M input tokens. For speed, Mistral Medium 3 is faster at ~300ms. Mistral Medium 3 excels at Production APIs 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

Mistral Medium 3 costs $0.04/1M input tokens and $0.08/1M output tokens. FLUX.1 Dev costs $0.003/image input and N/A output. FLUX.1 Dev is 13.3x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Mistral Medium 3 has a 128K context window with ~300ms latency. FLUX.1 Dev offers N/A context at ~3s. Mistral Medium 3 has the larger context window.

Best For

Mistral Medium 3 (Open Source) is optimized for: Production APIs, Template filling, General purpose. 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 Mistral Medium 3
response_a = client.chat.completions.create(
    model="mistral-medium-3",
    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

200+ AI models. One API. Pay-as-you-go.

Get API Key Try in Playground

Frequently Asked Questions

Which is better, Mistral Medium 3 or FLUX.1 Dev?

Mistral Medium 3 (Open Source, 70B) offers Good balance. FLUX.1 Dev (Image, 12B) offers Fine-tunable. Choose Mistral Medium 3 for Production APIs or FLUX.1 Dev for Custom styles.

How much does Mistral Medium 3 cost vs FLUX.1 Dev?

Mistral Medium 3: $0.04/1M input, $0.08/1M 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 Mistral Medium 3 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.