Llama 3.1 405B vs Mistral Large 2
Architecture Comparison
SpecLlama 3.1 405BMistral Large 2
TypeDENSEDENSE
Total Parameters405B123B
Active Parameters405B123B
Layers12688
Hidden Dimension16,38412,288
Attention Heads12896
KV Heads88
Context Length131,072131,072
Precision (default)BF16BF16
Memory Requirements
PrecisionLlama 3.1 405BMistral Large 2
BF16 Weights810.0 GB246.0 GB
FP8 Weights405.0 GB123.0 GB
INT4 Weights202.5 GB61.5 GB
KV-Cache / Token516096 B360448 B
Activation Estimate5.00 GB3.50 GB
Minimum GPUs Needed (BF16)
H100 SXMN/A4 GPUs
L40SN/A7 GPUs
Quality Benchmarks
BenchmarkLlama 3.1 405BMistral Large 2
Overall8882
MMLU88.684.0
HumanEval61.053.0
GSM8K96.891.2
MT-Bench88.084.0
Llama 3.1 405B
MMLU
88.6
HumanEval
61.0
GSM8K
96.8
MT-Bench
88.0
Mistral Large 2
MMLU
84.0
HumanEval
53.0
GSM8K
91.2
MT-Bench
84.0
Capabilities
FeatureLlama 3.1 405BMistral Large 2
Tool Use✓ Yes✓ Yes
Vision✗ No✗ No
Code✓ Yes✓ Yes
Math✓ Yes✓ Yes
Reasoning✗ No✗ No
Multilingual✓ Yes✓ Yes
Structured Output✓ Yes✓ Yes
API Pricing Comparison
Cheapest Output (Llama 3.1 405B)
$3.00/M
Input: $3.00/M
Cheapest Output (Mistral Large 2)
$2.50/M
Input: $2.50/M
| Provider | Llama 3.1 405B In $/M | Out $/M | Mistral Large 2 In $/M | Out $/M |
|---|---|---|---|---|
| together | $3.50 | $3.50 | $2.50 | $2.50 |
| fireworks | $3.00 | $3.00 | — | — |
| mistral | — | — | $2.00 | $6.00 |
Recommendation Summary
- ‣Llama 3.1 405B scores higher on overall quality (88 vs 82).
- ‣Mistral Large 2 is cheaper per output token ($2.50/M vs $3.00/M).
- ‣Mistral Large 2 has a smaller memory footprint (246.0 GB vs 810.0 GB BF16), making it easier to deploy on fewer GPUs.
- ‣Llama 3.1 405B is stronger at code generation (HumanEval: 61.0 vs 53.0).
- ‣Llama 3.1 405B is better at math reasoning (GSM8K: 96.8 vs 91.2).
Compare Other Models
Llama 3.1 405B vs DeepSeek R1→Llama 3.1 405B vs DeepSeek V3→Llama 3.1 405B vs Gemma 3 27B→Llama 3.1 405B vs Llama 3.1 70B→Llama 3.1 405B vs Llama 3.1 8B→Llama 3.1 405B vs Phi-4→Mistral Large 2 vs DeepSeek R1→Mistral Large 2 vs DeepSeek V3→Mistral Large 2 vs Gemma 3 27B→Mistral Large 2 vs Llama 3.1 70B→