SD 3.5 Medium vs InternVL 2.5 78B

Compare SD 3.5 Medium and InternVL 2.5 78B: 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 SD 3.5 Medium InternVL 2.5 78B
CategoryImageVision
Parameters2.5B78B
Context WindowN/A128K
Input Price$0.003/image/1M tokens$0.05/1M tokens
Output PriceN/A/1M tokens$0.10/1M tokens
Latency~2s~400ms

Choose SD 3.5 Medium when:

  • ✓ General imagery
  • ✓ Batch generation
  • ✓ Prototyping
Key Strengths:

Good quality, Fast, Open weights

Choose InternVL 2.5 78B when:

  • ✓ Document analysis
  • ✓ Chart reading
  • ✓ Visual Q&A
Key Strengths:

Strong visual reasoning, Open weights, Good OCR

Verdict: SD 3.5 Medium vs InternVL 2.5 78B

For cost efficiency, SD 3.5 Medium wins at $0.003/image/1M input tokens. For speed, SD 3.5 Medium is faster at ~2s. SD 3.5 Medium excels at General imagery while InternVL 2.5 78B is better for Document analysis. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

SD 3.5 Medium costs $0.003/image/1M input tokens and N/A/1M output tokens. InternVL 2.5 78B costs $0.05 input and $0.10 output. SD 3.5 Medium is 16.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

SD 3.5 Medium has a N/A context window with ~2s latency. InternVL 2.5 78B offers 128K context at ~400ms. InternVL 2.5 78B has the larger context window.

Best For

SD 3.5 Medium (Image) is optimized for: General imagery, Batch generation, Prototyping. InternVL 2.5 78B (Vision) works best for: Document analysis, Chart reading, Visual Q&A.

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 SD 3.5 Medium
response_a = client.chat.completions.create(
    model="stable-diffusion-3-5-medium",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use InternVL 2.5 78B
response_b = client.chat.completions.create(
    model="internvl-2-5-78b",
    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, SD 3.5 Medium or InternVL 2.5 78B?

SD 3.5 Medium (Image, 2.5B) offers Good quality. InternVL 2.5 78B (Vision, 78B) offers Strong visual reasoning. Choose SD 3.5 Medium for General imagery or InternVL 2.5 78B for Document analysis.

How much does SD 3.5 Medium cost vs InternVL 2.5 78B?

SD 3.5 Medium: $0.003/image/1M input, N/A/1M output. InternVL 2.5 78B: $0.05/1M input, $0.10/1M 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 SD 3.5 Medium and InternVL 2.5 78B 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.