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GPT-5 vs Llama 3.1 405B Instruct
Comprehensive side-by-side LLM comparison
GPT-5 leads with 21.0% higher average benchmark score. GPT-5 offers 272.0K more tokens in context window than Llama 3.1 405B Instruct. Llama 3.1 405B Instruct is $9.47 cheaper per million tokens. GPT-5 supports multimodal inputs. Llama 3.1 405B Instruct is available on 8 providers. Overall, GPT-5 is the stronger choice for coding tasks.
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OpenAI
GPT-5 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 70.1% across 35 benchmarks. It excels particularly in SWE-Lancer (IC-Diamond subset) (100.0%), COLLIE (99.0%), Tau2 Telecom (96.7%). It supports a 528K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents OpenAI's latest advancement in AI technology.
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Meta
Llama 3.1 405B Instruct is a language model developed by Meta. It achieves strong performance with an average score of 79.2% across 18 benchmarks. It excels particularly in ARC-C (96.9%), GSM8k (96.8%), API-Bank (92.0%). It supports a 256K token context window for handling large documents. The model is available through 8 API providers. Released in 2024, it represents Meta's latest advancement in AI technology.
1 year newer
Llama 3.1 405B Instruct
Meta
2024-07-23
GPT-5
OpenAI
2025-08-07
Pricing Comparison
Cost per million tokens (USD)
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GPT-5
Input:$1.25
Output:$10.00
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Llama 3.1 405B Instruct
Input:$0.89
Output:$0.89($9.47 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 49 common benchmarks
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GPT-5
Average Score:50.1%(+21.0%)
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Llama 3.1 405B Instruct
Average Score:29.1%
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Knowledge Cutoff
Training data recency comparison
GPT-5
2024-09-30
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5
2 providers
OpenAI
Throughput: 100 tok/s
Latency: 2ms
ZeroEval
Throughput: 100 tok/s
Latency: 2ms
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GPT-5
Avg Score:50.1%(+21.0%)
Providers:2
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Llama 3.1 405B Instruct
Avg Score:29.1%
Providers:8