Runway Gen-3 Alpha vs Molmo 72B

Compare Runway Gen-3 Alpha and Molmo 72B: 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 Runway Gen-3 Alpha Molmo 72B
CategoryVideoVision
Parameters~8B72B
Context WindowN/A128K
Input Price$0.25/video/1M tokens$0.04/1M tokens
Output PriceN/A/1M tokens$0.08/1M tokens
Latency~45s~350ms

Choose Runway Gen-3 Alpha when:

  • ✓ Film production
  • ✓ Advertising
  • ✓ Content creation
Key Strengths:

Cinematic quality, Good control, Professional

Choose Molmo 72B when:

  • ✓ Visual grounding
  • ✓ Object detection
  • ✓ Research
Key Strengths:

Fully open, Good pointing/grounding, Transparent

Verdict: Runway Gen-3 Alpha vs Molmo 72B

For cost efficiency, Molmo 72B wins at $0.04/1M input tokens. For speed, Molmo 72B is faster at ~350ms. Runway Gen-3 Alpha excels at Film production while Molmo 72B is better for Visual grounding. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Runway Gen-3 Alpha costs $0.25/video/1M input tokens and N/A/1M output tokens. Molmo 72B costs $0.04 input and $0.08 output. Molmo 72B is 6.3x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Runway Gen-3 Alpha has a N/A context window with ~45s latency. Molmo 72B offers 128K context at ~350ms. Molmo 72B has the larger context window.

Best For

Runway Gen-3 Alpha (Video) is optimized for: Film production, Advertising, Content creation. Molmo 72B (Vision) works best for: Visual grounding, Object detection, Research.

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 Runway Gen-3 Alpha
response_a = client.chat.completions.create(
    model="runway-gen3-alpha",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Molmo 72B
response_b = client.chat.completions.create(
    model="molmo-72b",
    messages=[{"role": "user", "content": "Your question here"}]
)

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Frequently Asked Questions

Which is better, Runway Gen-3 Alpha or Molmo 72B?

Runway Gen-3 Alpha (Video, ~8B) offers Cinematic quality. Molmo 72B (Vision, 72B) offers Fully open. Choose Runway Gen-3 Alpha for Film production or Molmo 72B for Visual grounding.

How much does Runway Gen-3 Alpha cost vs Molmo 72B?

Runway Gen-3 Alpha: $0.25/video/1M input, N/A/1M output. Molmo 72B: $0.04/1M input, $0.08/1M 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 Runway Gen-3 Alpha and Molmo 72B 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.