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Llama 3.1 70B Instruct vs Llama 3.1 8B Instruct

Meta · released

Wins 3 of 6 areas

Coding · Reasoning · Following instructions

Meta · released

Wins 1 of 6 areas

Long documents

Llama 3.1 70B Instruct wins more areas, narrowly.Llama 3.1 8B Instruct is cheaper and better at long documents.

Scores updated · 42 tests both models report · How we compare

Where each one wins

Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.

Agents, long documents and following instructions rest on a single test each.

What it costs

Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.

Llama 3.1 70B Instruct$0.56 to read · $0.56 to write$1.12Price from Artificial Analysis
Llama 3.1 8B Instruct$0.02 to read · $0.05 to write$0.07Price from Artificial Analysis

Llama 3.1 8B Instruct costs 94% less for the same work.

The biggest differences

The tests each model wins by the widest margin, up to three each. Scores are out of 100.

Where Llama 3.1 70B Instruct pulls ahead

  • Graduate-level biology, physics and chemistry questionsGPQA Diamond+15points aheadLlama 3.1 70B Instruct40.9Llama 3.1 8B Instruct25.9
  • Code for real scientific research problemsSciCode+13.5points aheadLlama 3.1 70B Instruct26.7Llama 3.1 8B Instruct13.2
  • Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+11.2points aheadLlama 3.1 70B Instruct19.7Llama 3.1 8B Instruct8.5

Where Llama 3.1 8B Instruct pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+35.2points aheadLlama 3.1 8B Instruct57Llama 3.1 70B Instruct21.8
  • Reasons across sets of long documentsAA-LCR+10points aheadLlama 3.1 8B Instruct18Llama 3.1 70B Instruct8

Every test, side by side

All 42 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingLlama 3.1 70B Instruct

Full coding ranking

AgentsEven

Full agents ranking

ReasoningLlama 3.1 70B Instruct

Full reasoning ranking

FactsEven

Full facts ranking

Long documentsLlama 3.1 8B Instruct
  • AA-LCRLlama 3.1 8B Instruct by 10818+10

Full long documents ranking

Following instructionsLlama 3.1 70B Instruct
  • IFBenchLlama 3.1 70B Instruct by 5.834.428.6+5.8

Full following instructions ranking

Other results32 tests, not counted

Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.

Questions people ask

Which is better, Llama 3.1 70B Instruct or Llama 3.1 8B Instruct?

Llama 3.1 70B Instruct wins three of the six areas where both have results: coding, reasoning and following instructions. Llama 3.1 8B Instruct wins long documents, and costs 94% less. They are level on agents and facts.

Which is better for coding?

Llama 3.1 70B Instruct. It wins 2 of the 2 coding tests both models report; Llama 3.1 8B Instruct wins none.

Which is cheaper?

Llama 3.1 70B Instruct costs $0.56 per million input tokens and $0.56 per million output tokens; Llama 3.1 8B Instruct costs $0.02 and $0.05. That makes Llama 3.1 8B Instruct about 94% cheaper for the same work.

How do you compare the two?

We use the 42 benchmark tests both models have published scores on. The verdict counts the 10 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 32 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.