SD 3.5 Large vs InternLM 2.5 20B

Compare SD 3.5 Large and InternLM 2.5 20B: 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 Large InternLM 2.5 20B
CategoryImageOpen Source
Parameters8B20B
Context WindowN/A256K
Input Price$0.004/image/1M tokens$0.02/1M tokens
Output PriceN/A/1M tokens$0.04/1M tokens
Latency~3s~180ms

Choose SD 3.5 Large when:

  • ✓ Detailed illustrations
  • ✓ Temple artwork
  • ✓ Marketing imagery
Key Strengths:

High quality, Detailed output, Good composition

Choose InternLM 2.5 20B when:

  • ✓ Long context tasks
  • ✓ Research
  • ✓ Multilingual
Key Strengths:

256K context, Strong reasoning, Good multilingual

Verdict: SD 3.5 Large vs InternLM 2.5 20B

For cost efficiency, SD 3.5 Large wins at $0.004/image/1M input tokens. For speed, InternLM 2.5 20B is faster at ~180ms. SD 3.5 Large excels at Detailed illustrations while InternLM 2.5 20B is better for Long context tasks. 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 Large costs $0.004/image/1M input tokens and N/A/1M output tokens. InternLM 2.5 20B costs $0.02 input and $0.04 output. SD 3.5 Large is 5.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

SD 3.5 Large has a N/A context window with ~3s latency. InternLM 2.5 20B offers 256K context at ~180ms. InternLM 2.5 20B has the larger context window.

Best For

SD 3.5 Large (Image) is optimized for: Detailed illustrations, Temple artwork, Marketing imagery. InternLM 2.5 20B (Open Source) works best for: Long context tasks, Research, Multilingual.

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

# Use InternLM 2.5 20B
response_b = client.chat.completions.create(
    model="internlm-2-5-20b",
    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 Large or InternLM 2.5 20B?

SD 3.5 Large (Image, 8B) offers High quality. InternLM 2.5 20B (Open Source, 20B) offers 256K context. Choose SD 3.5 Large for Detailed illustrations or InternLM 2.5 20B for Long context tasks.

How much does SD 3.5 Large cost vs InternLM 2.5 20B?

SD 3.5 Large: $0.004/image/1M input, N/A/1M output. InternLM 2.5 20B: $0.02/1M input, $0.04/1M 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 Large and InternLM 2.5 20B 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.