Claude Opus 4.5 vs StarCoder2 15B
Compare Claude Opus 4.5 and StarCoder2 15B: 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 Opus 4.5 | StarCoder2 15B |
|---|---|---|
| Category | Frontier | Code |
| Parameters | ~2.5T | 15B |
| Context Window | 200K | 16K |
| Input Price | $0.15/1M tokens | $0.02/1M tokens |
| Output Price | $0.75/1M tokens | $0.03/1M tokens |
| Latency | ~900ms | ~150ms |
Choose Claude Opus 4.5 when:
- ✓ Creative writing
- ✓ Complex analysis
- ✓ Research
Superior creativity, Nuanced reasoning, Complex analysis
Choose StarCoder2 15B when:
- ✓ Code completion
- ✓ Code generation
- ✓ Bug fixing
Strong coding, 600+ languages, Open weights
Verdict: Claude Opus 4.5 vs StarCoder2 15B
For cost efficiency, StarCoder2 15B wins at $0.02/1M input tokens. For speed, StarCoder2 15B is faster at ~150ms. Claude Opus 4.5 excels at Creative writing while StarCoder2 15B is better for Code completion. 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 Opus 4.5 costs $0.15/1M input tokens and $0.75/1M output tokens. StarCoder2 15B costs $0.02 input and $0.03 output. StarCoder2 15B is 7.5x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Claude Opus 4.5 has a 200K context window with ~900ms latency. StarCoder2 15B offers 16K context at ~150ms. Claude Opus 4.5 has the larger context window.
Best For
Claude Opus 4.5 (Frontier) is optimized for: Creative writing, Complex analysis, Research. StarCoder2 15B (Code) works best for: Code completion, Code generation, Bug fixing.
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 Opus 4.5
response_a = client.chat.completions.create(
model="claude-opus-4-5",
messages=[{"role": "user", "content": "Your question here"}]
)
# Use StarCoder2 15B
response_b = client.chat.completions.create(
model="starcoder2-15b",
messages=[{"role": "user", "content": "Your question here"}]
)Frequently Asked Questions
Which is better, Claude Opus 4.5 or StarCoder2 15B?
Claude Opus 4.5 (Frontier, ~2.5T) offers Superior creativity. StarCoder2 15B (Code, 15B) offers Strong coding. Choose Claude Opus 4.5 for Creative writing or StarCoder2 15B for Code completion.
How much does Claude Opus 4.5 cost vs StarCoder2 15B?
Claude Opus 4.5: $0.15/1M input, $0.75/1M output. StarCoder2 15B: $0.02/1M input, $0.03/1M 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 Opus 4.5 and StarCoder2 15B 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.