o3 Mini vs StarCoder2 15B

Compare o3 Mini 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

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Feature o3 Mini StarCoder2 15B
CategoryReasoningCode
Parameters~200B15B
Context Window200K16K
Input Price$0.04/1M tokens$0.02/1M tokens
Output Price$0.16/1M tokens$0.03/1M tokens
Latency~1000ms~150ms

Choose o3 Mini when:

  • ✓ Structured analysis
  • ✓ Quick reasoning
  • ✓ Scoring tasks
Key Strengths:

Fast reasoning, Good logic chains, Cost-efficient

Choose StarCoder2 15B when:

  • ✓ Code completion
  • ✓ Code generation
  • ✓ Bug fixing
Key Strengths:

Strong coding, 600+ languages, Open weights

Verdict: o3 Mini vs StarCoder2 15B

For cost efficiency, StarCoder2 15B wins at $0.02/1M input tokens. For speed, o3 Mini is faster at ~1000ms. o3 Mini excels at Structured analysis 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

o3 Mini costs $0.04/1M input tokens and $0.16/1M output tokens. StarCoder2 15B costs $0.02 input and $0.03 output. StarCoder2 15B is 2.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

o3 Mini has a 200K context window with ~1000ms latency. StarCoder2 15B offers 16K context at ~150ms. o3 Mini has the larger context window.

Best For

o3 Mini (Reasoning) is optimized for: Structured analysis, Quick reasoning, Scoring tasks. 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 o3 Mini
response_a = client.chat.completions.create(
    model="o3-mini",
    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"}]
)

Start Building with XALEN

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Get API Key Try in Playground

Frequently Asked Questions

Which is better, o3 Mini or StarCoder2 15B?

o3 Mini (Reasoning, ~200B) offers Fast reasoning. StarCoder2 15B (Code, 15B) offers Strong coding. Choose o3 Mini for Structured analysis or StarCoder2 15B for Code completion.

How much does o3 Mini cost vs StarCoder2 15B?

o3 Mini: $0.04/1M input, $0.16/1M 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 o3 Mini 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.