Solar Pro vs Molmo 72B
Compare Solar Pro 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
| Feature | Solar Pro | Molmo 72B |
|---|---|---|
| Category | Open Source | Vision |
| Parameters | 22B | 72B |
| Context Window | 32K | 128K |
| Input Price | $0.02/1M tokens | $0.04/1M tokens |
| Output Price | $0.04/1M tokens | $0.08/1M tokens |
| Latency | ~180ms | ~350ms |
Choose Solar Pro when:
- ✓ General purpose
- ✓ Korean content
- ✓ Chatbots
Good instruction following, Compact, Efficient
Choose Molmo 72B when:
- ✓ Visual grounding
- ✓ Object detection
- ✓ Research
Fully open, Good pointing/grounding, Transparent
Verdict: Solar Pro vs Molmo 72B
For cost efficiency, Solar Pro wins at $0.02/1M input tokens. For speed, Solar Pro is faster at ~180ms. Solar Pro excels at General purpose 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
Solar Pro costs $0.02/1M input tokens and $0.04/1M output tokens. Molmo 72B costs $0.04 input and $0.08 output. Solar Pro is 2.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Solar Pro has a 32K context window with ~180ms latency. Molmo 72B offers 128K context at ~350ms. Molmo 72B has the larger context window.
Best For
Solar Pro (Open Source) is optimized for: General purpose, Korean content, Chatbots. 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 Solar Pro
response_a = client.chat.completions.create(
model="solar-pro",
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"}]
)Frequently Asked Questions
Which is better, Solar Pro or Molmo 72B?
Solar Pro (Open Source, 22B) offers Good instruction following. Molmo 72B (Vision, 72B) offers Fully open. Choose Solar Pro for General purpose or Molmo 72B for Visual grounding.
How much does Solar Pro cost vs Molmo 72B?
Solar Pro: $0.02/1M input, $0.04/1M 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 Solar Pro 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.