Claude 3.5 Sonnet (Thinking) vs InternVL 2.5 78B
Compare Claude 3.5 Sonnet (Thinking) 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 | Claude 3.5 Sonnet (Thinking) | InternVL 2.5 78B |
|---|---|---|
| Category | Reasoning | Vision |
| Parameters | ~500B | 78B |
| Context Window | 200K | 128K |
| Input Price | $0.03/1M tokens | $0.05/1M tokens |
| Output Price | $0.15/1M tokens | $0.10/1M tokens |
| Latency | ~600ms | ~400ms |
Choose Claude 3.5 Sonnet (Thinking) when:
- ✓ Complex analysis
- ✓ Multi-step logic
- ✓ Verification tasks
Transparent thinking, Strong reasoning, Self-correction
Choose InternVL 2.5 78B when:
- ✓ Document analysis
- ✓ Chart reading
- ✓ Visual Q&A
Strong visual reasoning, Open weights, Good OCR
Verdict: Claude 3.5 Sonnet (Thinking) vs InternVL 2.5 78B
For cost efficiency, Claude 3.5 Sonnet (Thinking) wins at $0.03/1M input tokens. For speed, InternVL 2.5 78B is faster at ~400ms. Claude 3.5 Sonnet (Thinking) excels at Complex analysis 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
Claude 3.5 Sonnet (Thinking) costs $0.03/1M input tokens and $0.15/1M output tokens. InternVL 2.5 78B costs $0.05 input and $0.10 output. Claude 3.5 Sonnet (Thinking) is 1.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Claude 3.5 Sonnet (Thinking) has a 200K context window with ~600ms latency. InternVL 2.5 78B offers 128K context at ~400ms. Claude 3.5 Sonnet (Thinking) has the larger context window.
Best For
Claude 3.5 Sonnet (Thinking) (Reasoning) is optimized for: Complex analysis, Multi-step logic, Verification tasks. 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 Claude 3.5 Sonnet (Thinking)
response_a = client.chat.completions.create(
model="claude-3-5-sonnet-thinking",
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, Claude 3.5 Sonnet (Thinking) or InternVL 2.5 78B?
Claude 3.5 Sonnet (Thinking) (Reasoning, ~500B) offers Transparent thinking. InternVL 2.5 78B (Vision, 78B) offers Strong visual reasoning. Choose Claude 3.5 Sonnet (Thinking) for Complex analysis or InternVL 2.5 78B for Document analysis.
How much does Claude 3.5 Sonnet (Thinking) cost vs InternVL 2.5 78B?
Claude 3.5 Sonnet (Thinking): $0.03/1M input, $0.15/1M 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 Claude 3.5 Sonnet (Thinking) 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.