Compare · ModelsLive · 2 picked · head to head
Llama 3.1 8B Instruct vs Llama 3 70B Instruct
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Llama 3 70B Instruct wins on 4/5 benchmarks
Llama 3 70B Instruct wins 4 of 5 shared benchmarks. Leads in arena · knowledge.
Category leads
arena·Llama 3 70B Instructknowledge·Llama 3 70B Instructmath·Llama 3.1 8B Instruct
Hype vs Reality
Attention vs performance
Llama 3.1 8B Instruct
#275 by perf·#18 by attention
Llama 3 70B Instruct
#241 by perf·#18 by attention
Best value
Llama 3.1 8B Instruct
18.7x better value than Llama 3 70B Instruct
Llama 3.1 8B Instruct
968.0 pts/$
$0.03/M
Llama 3 70B Instruct
51.8 pts/$
$0.63/M
Vendor risk
Who is behind the model
Meta AI
$1.87T·Tier 1
Meta AI
$1.87T·Tier 1
Head to head
5 benchmarks · 2 models
Llama 3.1 8B InstructLlama 3 70B Instruct
Chatbot Arena Elo · Overall
Llama 3 70B Instruct leads by +63.9
Llama 3.1 8B Instruct
1211.2
Llama 3 70B Instruct
1275.1
GPQA diamond
Llama 3 70B Instruct leads by +18.1
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Llama 3.1 8B Instruct
2.6
Llama 3 70B Instruct
20.8
MATH level 5
Llama 3.1 8B Instruct leads by +0.3
MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics.
Llama 3.1 8B Instruct
22.9
Llama 3 70B Instruct
22.6
MMLU
Llama 3 70B Instruct leads by +30.9
Massive Multitask Language Understanding · 57 subjects spanning STEM, humanities, social sciences, and more. The standard benchmark for broad knowledge.
Llama 3.1 8B Instruct
41.5
Llama 3 70B Instruct
72.4
OTIS Mock AIME 2024-2025
Llama 3 70B Instruct leads by +2.6
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Llama 3.1 8B Instruct
1.6
Llama 3 70B Instruct
4.2
Full benchmark table
| Benchmark | Llama 3.1 8B Instruct | Llama 3 70B Instruct |
|---|---|---|
Chatbot Arena Elo · Overall | 1211.2 | 1275.1 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 2.6 | 20.8 |
MATH level 5 MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics. | 22.9 | 22.6 |
MMLU Massive Multitask Language Understanding · 57 subjects spanning STEM, humanities, social sciences, and more. The standard benchmark for broad knowledge. | 41.5 | 72.4 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 1.6 | 4.2 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.02 | $0.03 | 131K tokens (~66 books) | $0.23 | |
| $0.51 | $0.74 | 8K tokens (~4 books) | $5.67 |