Llama 3.3 70B vs Llama 3.1 405B

Compare Llama 3.3 70B and Llama 3.1 405B: 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 Llama 3.3 70B Llama 3.1 405B
CategoryOpen SourceOpen Source
Parameters70B405B
Context Window128K128K
Input Price$0.04/1M tokens$0.08/1M tokens
Output Price$0.06/1M tokens$0.14/1M tokens
Latency~300ms~600ms

Choose Llama 3.3 70B when:

  • ✓ General Q&A
  • ✓ Hindi chatbots
  • ✓ Content generation
Key Strengths:

Proven reliability, Good Hindi/Tamil, 128K context

Choose Llama 3.1 405B when:

  • ✓ Premium tasks
  • ✓ Research
  • ✓ Fine-tuning base
Key Strengths:

Largest open model, Highest open-source quality

Verdict: Llama 3.3 70B vs Llama 3.1 405B

For cost efficiency, Llama 3.3 70B wins at $0.04/1M input tokens. For speed, Llama 3.3 70B is faster at ~300ms. Llama 3.3 70B excels at General Q&A while Llama 3.1 405B is better for Premium tasks. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Llama 3.3 70B costs $0.04/1M input tokens and $0.06/1M output tokens. Llama 3.1 405B costs $0.08 input and $0.14 output. Llama 3.3 70B is 2.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Llama 3.3 70B has a 128K context window with ~300ms latency. Llama 3.1 405B offers 128K context at ~600ms. Both have identical context windows.

Best For

Llama 3.3 70B (Open Source) is optimized for: General Q&A, Hindi chatbots, Content generation. Llama 3.1 405B (Open Source) works best for: Premium tasks, Research, Fine-tuning base.

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 Llama 3.3 70B
response_a = client.chat.completions.create(
    model="llama-3-3-70b",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Llama 3.1 405B
response_b = client.chat.completions.create(
    model="llama-3-1-405b",
    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, Llama 3.3 70B or Llama 3.1 405B?

Llama 3.3 70B (Open Source, 70B) offers Proven reliability. Llama 3.1 405B (Open Source, 405B) offers Largest open model. Choose Llama 3.3 70B for General Q&A or Llama 3.1 405B for Premium tasks.

How much does Llama 3.3 70B cost vs Llama 3.1 405B?

Llama 3.3 70B: $0.04/1M input, $0.06/1M output. Llama 3.1 405B: $0.08/1M input, $0.14/1M 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 Llama 3.3 70B and Llama 3.1 405B 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.