Claude Fable 5 vs Llama 3.1 Nemotron Nano 4B V1.1
Wins 4 of 4 areas
Coding · Reasoning · Long documents · Following instructions
Wins 0 of 4 areas
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Claude Fable 5 is the stronger all-rounder.
Scores updated · 7 tests both models report · How we compare
Where each one wins
Tests won in each of the four 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.
Coding, 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.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude Fable 5 pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+51.8points ahead
- Code for real scientific research problemsSciCode+50.9points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+50.3points ahead
Where Llama 3.1 Nemotron Nano 4B V1.1 pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 7 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningClaude Fable 5
- GPQA DiamondClaude Fable 5 by 51.892.640.8+51.8
- Humanity's Last ExamClaude Fable 5 by 50.355.55.2+50.3
Following instructionsClaude Fable 5
- IFBenchClaude Fable 5 by 3863.525.5+38
Other results2 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.
- τ²-Bench Telecom (AA run)Claude Fable 5 by 86.898.511.7+86.8
- AA IntelligenceClaude Fable 5 by 42.349.67.3+42.3
Questions people ask
Which is better, Claude Fable 5 or Llama 3.1 Nemotron Nano 4B V1.1?
Claude Fable 5 wins all four areas where both have results: coding, reasoning, long documents and following instructions. Llama 3.1 Nemotron Nano 4B V1.1 wins none.
Which is better for coding?
Claude Fable 5. It wins the one coding test both models report.
How do you compare the two?
We use the 7 benchmark tests both models have published scores on. The verdict counts the 5 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 2 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.