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Llama 3.1 Instruct 405B vs Llama 3 Instruct 8B

Meta · released

Wins 4 of 5 areas

Coding · Facts · Long documents · Following instructions

Meta · released

Wins 0 of 5 areas

—

Llama 3.1 Instruct 405B is the stronger all-rounder.

Scores updated · 36 tests both models report · How we compare

Where each one wins

Tests won in each of the five 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.

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 Instruct 405BNo current price is tracked.
Llama 3 Instruct 8B$0.04 to read · $0.14 to write$0.19Price from Artificial Analysis

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 Instruct 405B pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+37.4points aheadLlama 3.1 Instruct 405B47.6Llama 3 Instruct 8B10.2
  • Graduate-level biology, physics and chemistry questionsGPQA Diamond+21.9points aheadLlama 3.1 Instruct 405B51.5Llama 3 Instruct 8B29.6
  • Code for real scientific research problemsSciCode+18points aheadLlama 3.1 Instruct 405B29.9Llama 3 Instruct 8B11.9

Where Llama 3 Instruct 8B pulls ahead

  • Very hard expert questions across many subjectsHumanity's Last Exam+1.1points aheadLlama 3 Instruct 8B5.1Llama 3.1 Instruct 405B4

Every test, side by side

All 36 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingLlama 3.1 Instruct 405B

Full coding ranking

ReasoningEven

Full reasoning ranking

FactsLlama 3.1 Instruct 405B

Full facts ranking

Long documentsLlama 3.1 Instruct 405B
  • AA-LCRLlama 3.1 Instruct 405B by 25.325.30+25.3

Full long documents ranking

Following instructionsLlama 3.1 Instruct 405B
  • IFBenchLlama 3.1 Instruct 405B by 14.43924.6+14.4

Full following instructions ranking

Other results27 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 Instruct 405B or Llama 3 Instruct 8B?

Llama 3.1 Instruct 405B wins four of the five areas where both have results: coding, facts, long documents and following instructions. Llama 3 Instruct 8B wins none. They are level on reasoning.

Which is better for coding?

Llama 3.1 Instruct 405B. It wins 2 of the 2 coding tests both models report; Llama 3 Instruct 8B wins none.

How do you compare the two?

We use the 36 benchmark tests both models have published scores on. The verdict counts the 9 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 27 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.

Compare Llama 3.1 Instruct 405B with

Meta

Across the field

All comparisons