Claude Sonnet 4.6 vs Llama 3.1 405B
Pricing, context window, and benchmark comparison · Last updated April 2026
Llama 3.1 405B is cheaper than Claude Sonnet 4.6 at $2.70/1M/1M vs $3.00/1M/1M input tokens — a 1.1x cost difference. Claude Sonnet 4.6 scores higher on quality benchmarks (ELO 1310). Choose Llama 3.1 405B for cost-sensitive workloads; choose Claude Sonnet 4.6 for maximum quality.
Which is cheaper: Claude Sonnet 4.6 or Llama 3.1 405B?
Llama 3.1 405B is the cheaper option at $2.70/1M per 1M input tokens, compared to $3.00/1M for Claude Sonnet 4.6. That is a 1.1x cost difference on input tokens. Output pricing follows a similar pattern: Claude Sonnet 4.6 charges $15.00/1M/1M vs $2.70/1M/1M for Llama 3.1 405B.
Which has better quality: Claude Sonnet 4.6 or Llama 3.1 405B?
Based on LMSYS Chatbot Arena rankings, Claude Sonnet 4.6 achieves a higher ELO score (1310 vs 1267), suggesting stronger performance on open-ended tasks. Claude Sonnet 4.6 excels at latest claude model with improved agentic capabilities. Llama 3.1 405B is known for open source — can be self-hosted for data privacy.
Which should you choose: Claude Sonnet 4.6 or Llama 3.1 405B?
- → Latest Claude model with improved agentic capabilities
- → Better at multi-step autonomous workflows
- → 200K context window
- → Open source — can be self-hosted for data privacy
- → Competitive with GPT-4o on many benchmarks
- → Strong multilingual capabilities
Frequently Asked Questions
Which is cheaper: Claude Sonnet 4.6 or Llama 3.1 405B?
Llama 3.1 405B is cheaper at $2.70/1M per 1M input tokens, making it 1.1x more affordable.
Which has better quality: Claude Sonnet 4.6 or Llama 3.1 405B?
Claude Sonnet 4.6 scores higher on the LMSYS Chatbot Arena with an ELO of 1310, suggesting better overall quality for most tasks.
Which has a larger context window: Claude Sonnet 4.6 or Llama 3.1 405B?
Claude Sonnet 4.6 has a larger context window at 200K tokens.
Should I choose Claude Sonnet 4.6 or Llama 3.1 405B?
Choose Llama 3.1 405B if cost is the priority. Choose Claude Sonnet 4.6 if benchmark quality is most important. Consider your specific use case: Claude Sonnet 4.6 is best for coding and function-calling, while Llama 3.1 405B excels at coding and research.
Is Claude Sonnet 4.6 or Llama 3.1 405B open source?
Claude Sonnet 4.6 is proprietary. Llama 3.1 405B is open source.