Grok 2 vs InternVL 2.5 78B
Compare Grok 2 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 | Grok 2 | InternVL 2.5 78B |
|---|---|---|
| Category | Open Source | Vision |
| Parameters | ~300B | 78B |
| Context Window | 128K | 128K |
| Input Price | $0.05/1M tokens | $0.05/1M tokens |
| Output Price | $0.10/1M tokens | $0.10/1M tokens |
| Latency | ~350ms | ~400ms |
Choose Grok 2 when:
- ✓ General purpose
- ✓ Content generation
- ✓ Analysis
Proven model, Good reasoning, Reliable
Choose InternVL 2.5 78B when:
- ✓ Document analysis
- ✓ Chart reading
- ✓ Visual Q&A
Strong visual reasoning, Open weights, Good OCR
Verdict: Grok 2 vs InternVL 2.5 78B
For cost efficiency, InternVL 2.5 78B wins at $0.05/1M input tokens. For speed, Grok 2 is faster at ~350ms. Grok 2 excels at General purpose 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
Grok 2 costs $0.05/1M input tokens and $0.10/1M output tokens. InternVL 2.5 78B costs $0.05 input and $0.10 output. Both models are similarly priced. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Grok 2 has a 128K context window with ~350ms latency. InternVL 2.5 78B offers 128K context at ~400ms. Both have identical context windows.
Best For
Grok 2 (Open Source) is optimized for: General purpose, Content generation, Analysis. 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 Grok 2
response_a = client.chat.completions.create(
model="grok-2",
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, Grok 2 or InternVL 2.5 78B?
Grok 2 (Open Source, ~300B) offers Proven model. InternVL 2.5 78B (Vision, 78B) offers Strong visual reasoning. Choose Grok 2 for General purpose or InternVL 2.5 78B for Document analysis.
How much does Grok 2 cost vs InternVL 2.5 78B?
Grok 2: $0.05/1M input, $0.10/1M 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 Grok 2 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.