Cohere Rerank 3.5 vs Hermes 3 70B

Compare Cohere Rerank 3.5 and Hermes 3 70B: 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 Cohere Rerank 3.5 Hermes 3 70B
CategoryRerankingOpen Source
Parameters~600M70B
Context Window4K128K
Input Price$0.002/search/1M tokens$0.04/1M tokens
Output PriceN/A/1M tokens$0.06/1M tokens
Latency~25ms~300ms

Choose Cohere Rerank 3.5 when:

  • ✓ Search reranking
  • ✓ RAG improvement
  • ✓ Result quality
Key Strengths:

Higher quality, Multilingual, Fast

Choose Hermes 3 70B when:

  • ✓ Agent frameworks
  • ✓ Tool use
  • ✓ Structured output
Key Strengths:

Strong function calling, Community-tuned, Good reasoning

Verdict: Cohere Rerank 3.5 vs Hermes 3 70B

For cost efficiency, Cohere Rerank 3.5 wins at $0.002/search/1M input tokens. For speed, Cohere Rerank 3.5 is faster at ~25ms. Cohere Rerank 3.5 excels at Search reranking while Hermes 3 70B is better for Agent frameworks. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Cohere Rerank 3.5 costs $0.002/search/1M input tokens and N/A/1M output tokens. Hermes 3 70B costs $0.04 input and $0.06 output. Cohere Rerank 3.5 is 20.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Cohere Rerank 3.5 has a 4K context window with ~25ms latency. Hermes 3 70B offers 128K context at ~300ms. Hermes 3 70B has the larger context window.

Best For

Cohere Rerank 3.5 (Reranking) is optimized for: Search reranking, RAG improvement, Result quality. Hermes 3 70B (Open Source) works best for: Agent frameworks, Tool use, Structured output.

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 Cohere Rerank 3.5
response_a = client.chat.completions.create(
    model="rerank-v3-5",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Hermes 3 70B
response_b = client.chat.completions.create(
    model="hermes-3-70b",
    messages=[{"role": "user", "content": "Your question here"}]
)

Start Building with XALEN

200+ AI models. One API. Pay-as-you-go.

Get API Key Try in Playground

Frequently Asked Questions

Which is better, Cohere Rerank 3.5 or Hermes 3 70B?

Cohere Rerank 3.5 (Reranking, ~600M) offers Higher quality. Hermes 3 70B (Open Source, 70B) offers Strong function calling. Choose Cohere Rerank 3.5 for Search reranking or Hermes 3 70B for Agent frameworks.

How much does Cohere Rerank 3.5 cost vs Hermes 3 70B?

Cohere Rerank 3.5: $0.002/search/1M input, N/A/1M output. Hermes 3 70B: $0.04/1M input, $0.06/1M 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 Cohere Rerank 3.5 and Hermes 3 70B 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.