Gemini 2.5 Pro Preview vs InternVL 2.5 78B
Compare Gemini 2.5 Pro Preview 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
| Feature | Gemini 2.5 Pro Preview | InternVL 2.5 78B |
|---|---|---|
| Category | Frontier | Vision |
| Parameters | ~1.5T | 78B |
| Context Window | 2M | 128K |
| Input Price | $0.07/1M tokens | $0.05/1M tokens |
| Output Price | $0.21/1M tokens | $0.10/1M tokens |
| Latency | ~700ms | ~400ms |
Choose Gemini 2.5 Pro Preview when:
- ✓ Research
- ✓ Long analysis
- ✓ Testing new capabilities
2M context, Experimental features, Strong reasoning
Choose InternVL 2.5 78B when:
- ✓ Document analysis
- ✓ Chart reading
- ✓ Visual Q&A
Strong visual reasoning, Open weights, Good OCR
Verdict: Gemini 2.5 Pro Preview vs InternVL 2.5 78B
For cost efficiency, InternVL 2.5 78B wins at $0.05/1M input tokens. For speed, InternVL 2.5 78B is faster at ~400ms. Gemini 2.5 Pro Preview excels at Research 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
Gemini 2.5 Pro Preview costs $0.07/1M input tokens and $0.21/1M output tokens. InternVL 2.5 78B costs $0.05 input and $0.10 output. InternVL 2.5 78B is 1.4x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Gemini 2.5 Pro Preview has a 2M context window with ~700ms latency. InternVL 2.5 78B offers 128K context at ~400ms. Gemini 2.5 Pro Preview has the larger context window.
Best For
Gemini 2.5 Pro Preview (Frontier) is optimized for: Research, Long analysis, Testing new capabilities. 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 Gemini 2.5 Pro Preview
response_a = client.chat.completions.create(
model="gemini-2-5-pro-preview",
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"}]
)Frequently Asked Questions
Which is better, Gemini 2.5 Pro Preview or InternVL 2.5 78B?
Gemini 2.5 Pro Preview (Frontier, ~1.5T) offers 2M context. InternVL 2.5 78B (Vision, 78B) offers Strong visual reasoning. Choose Gemini 2.5 Pro Preview for Research or InternVL 2.5 78B for Document analysis.
How much does Gemini 2.5 Pro Preview cost vs InternVL 2.5 78B?
Gemini 2.5 Pro Preview: $0.07/1M input, $0.21/1M 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 Gemini 2.5 Pro Preview 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.