Llama 3.1 405B vs GPT-4 Turbo
Pricing, context window, and benchmark comparison · Last updated April 2026
Llama 3.1 405B is cheaper than GPT-4 Turbo at $2.70/1M/1M vs $10.00/1M/1M input tokens — a 3.7x cost difference. Llama 3.1 405B scores higher on quality benchmarks (ELO 1267). Choose Llama 3.1 405B for cost-sensitive workloads; both are strong choices depending on your budget.
Which is cheaper: Llama 3.1 405B or GPT-4 Turbo?
Llama 3.1 405B is the cheaper option at $2.70/1M per 1M input tokens, compared to $10.00/1M for GPT-4 Turbo. That is a 3.7x cost difference on input tokens. Output pricing follows a similar pattern: Llama 3.1 405B charges $2.70/1M/1M vs $30.00/1M/1M for GPT-4 Turbo.
Which has better quality: Llama 3.1 405B or GPT-4 Turbo?
Based on LMSYS Chatbot Arena rankings, Llama 3.1 405B achieves a higher ELO score (1267 vs 1260), suggesting stronger performance on open-ended tasks. Llama 3.1 405B excels at open source — can be self-hosted for data privacy. GPT-4 Turbo is known for strong general reasoning.
Which should you choose: Llama 3.1 405B or GPT-4 Turbo?
- → Open source — can be self-hosted for data privacy
- → Competitive with GPT-4o on many benchmarks
- → Strong multilingual capabilities
- → Strong general reasoning
- → Good at following complex multi-step instructions
- → Reliable tool/function calling
Frequently Asked Questions
Which is cheaper: Llama 3.1 405B or GPT-4 Turbo?
Llama 3.1 405B is cheaper at $2.70/1M per 1M input tokens, making it 3.7x more affordable.
Which has better quality: Llama 3.1 405B or GPT-4 Turbo?
Llama 3.1 405B scores higher on the LMSYS Chatbot Arena with an ELO of 1267, suggesting better overall quality for most tasks.
Which has a larger context window: Llama 3.1 405B or GPT-4 Turbo?
Llama 3.1 405B has a larger context window at 131K tokens.
Should I choose Llama 3.1 405B or GPT-4 Turbo?
Choose Llama 3.1 405B if cost is the priority. Choose Llama 3.1 405B if benchmark quality is most important. Consider your specific use case: Llama 3.1 405B is best for coding and research, while GPT-4 Turbo excels at coding and function-calling.
Is Llama 3.1 405B or GPT-4 Turbo open source?
Llama 3.1 405B is open source. GPT-4 Turbo is proprietary.