BGE Reranker v2 vs Solar Pro

Compare BGE Reranker v2 and Solar Pro: 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 BGE Reranker v2 Solar Pro
CategoryRerankingOpen Source
Parameters568M22B
Context Window8K32K
Input Price$0.003/1M tokens$0.02/1M tokens
Output PriceN/A/1M tokens$0.04/1M tokens
Latency~30ms~180ms

Choose BGE Reranker v2 when:

  • ✓ RAG reranking
  • ✓ Search improvement
  • ✓ Citation accuracy
Key Strengths:

High precision, Cross-encoder, Improves RAG quality

Choose Solar Pro when:

  • ✓ General purpose
  • ✓ Korean content
  • ✓ Chatbots
Key Strengths:

Good instruction following, Compact, Efficient

Verdict: BGE Reranker v2 vs Solar Pro

For cost efficiency, BGE Reranker v2 wins at $0.003/1M input tokens. For speed, Solar Pro is faster at ~180ms. BGE Reranker v2 excels at RAG reranking while Solar Pro is better for General purpose. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

BGE Reranker v2 costs $0.003/1M input tokens and N/A/1M output tokens. Solar Pro costs $0.02 input and $0.04 output. BGE Reranker v2 is 6.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

BGE Reranker v2 has a 8K context window with ~30ms latency. Solar Pro offers 32K context at ~180ms. Solar Pro has the larger context window.

Best For

BGE Reranker v2 (Reranking) is optimized for: RAG reranking, Search improvement, Citation accuracy. Solar Pro (Open Source) works best for: General purpose, Korean content, Chatbots.

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 BGE Reranker v2
response_a = client.chat.completions.create(
    model="bge-reranker-v2",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Solar Pro
response_b = client.chat.completions.create(
    model="solar-pro",
    messages=[{"role": "user", "content": "Your question here"}]
)

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Frequently Asked Questions

Which is better, BGE Reranker v2 or Solar Pro?

BGE Reranker v2 (Reranking, 568M) offers High precision. Solar Pro (Open Source, 22B) offers Good instruction following. Choose BGE Reranker v2 for RAG reranking or Solar Pro for General purpose.

How much does BGE Reranker v2 cost vs Solar Pro?

BGE Reranker v2: $0.003/1M input, N/A/1M output. Solar Pro: $0.02/1M input, $0.04/1M 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 BGE Reranker v2 and Solar Pro 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.