Cohere Rerank 3.5 vs AssemblyAI Universal 2

Compare Cohere Rerank 3.5 and AssemblyAI Universal 2: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.

Updated 2026-05-21 · By Abhishek Raj · Our methodology

All Cohere models All AssemblyAI models What is an LLM API? Python Quickstart What is inference?
Feature Cohere Rerank 3.5 AssemblyAI Universal 2
CategoryRerankingSpeech
Parameters~600M~2B
Context Window4KLong-form
Input Price$0.002/search/1M tokens$0.006/min/1M tokens
Output PriceN/A/1M tokensN/A/1M tokens
Latency~25ms~150ms

Choose Cohere Rerank 3.5 when:

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

Higher quality, Multilingual, Fast

Choose AssemblyAI Universal 2 when:

  • ✓ Meeting transcription
  • ✓ Podcast processing
  • ✓ Content indexing
Key Strengths:

High accuracy, Speaker diarization, Summarization

Verdict: Cohere Rerank 3.5 vs AssemblyAI Universal 2

For cost efficiency, Cohere Rerank 3.5 wins at $0.002/search/1M input tokens. For speed, AssemblyAI Universal 2 is faster at ~150ms. Cohere Rerank 3.5 excels at Search reranking while AssemblyAI Universal 2 is better for Meeting transcription. 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. AssemblyAI Universal 2 costs $0.006/min input and N/A output. Cohere Rerank 3.5 is 3.0x 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. AssemblyAI Universal 2 offers Long-form context at ~150ms. Both have identical context windows.

Best For

Cohere Rerank 3.5 (Reranking) is optimized for: Search reranking, RAG improvement, Result quality. AssemblyAI Universal 2 (Speech) works best for: Meeting transcription, Podcast processing, Content indexing.

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 AssemblyAI Universal 2
response_b = client.chat.completions.create(
    model="assembly-ai-universal-2",
    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 AssemblyAI Universal 2?

Cohere Rerank 3.5 (Reranking, ~600M) offers Higher quality. AssemblyAI Universal 2 (Speech, ~2B) offers High accuracy. Choose Cohere Rerank 3.5 for Search reranking or AssemblyAI Universal 2 for Meeting transcription.

How much does Cohere Rerank 3.5 cost vs AssemblyAI Universal 2?

Cohere Rerank 3.5: $0.002/search/1M input, N/A/1M output. AssemblyAI Universal 2: $0.006/min/1M input, N/A/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 AssemblyAI Universal 2 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.