Claude Fable 5 vs Nanbeige4.1-3B
Wins 5 of 6 areas
Coding · Agents · Reasoning · Long documents · Following instructions
Wins 0 of 6 areas
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Claude Fable 5 is the stronger all-rounder.
Scores updated · 16 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.
- ReasoningHard problems that need careful thinking30Claude Fable 53 of 3 tests
- CodingWriting and fixing software20Claude Fable 52 of 2 tests
- AgentsCarrying out multi-step tasks on its own20Claude Fable 52 of 2 tests
- Long documentsFinding answers in very long texts10Claude Fable 51 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Fable 51 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
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
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+55.5points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+44.6points ahead
- Code for real scientific research problemsSciCode+34.4points ahead
Where Nanbeige4.1-3B pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+5.5points ahead
Every test, side by side
All 16 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Fable 5
- Terminal-Bench HardClaude Fable 5 by 62.962.90+62.9
- SciCodeClaude Fable 5 by 34.46126.6+34.4
AgentsClaude Fable 5
- GDPValClaude Fable 5 by 55.655.60+55.6
- τ-Bench V3 · BankingClaude Fable 5 by 38.138.10+38.1
ReasoningClaude Fable 5
- Humanity's Last ExamClaude Fable 5 by 44.655.510.9+44.6
- CritPtClaude Fable 5 by 28.628.60+28.6
- GPQA DiamondClaude Fable 5 by 7.792.684.9+7.7
FactsEven
- AA-Omniscience · AccuracyClaude Fable 5 by 55.565.39.9+55.5
- AA-Omniscience · Non-hallucinationNanbeige4.1-3B by 5.536.441.9+5.5
Following instructionsClaude Fable 5
- IFBenchClaude Fable 5 by 28.163.535.4+28.1
Other results5 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.
- AA-OmniscienceClaude Fable 5 by 85.843.3-42.5+85.8
- τ²-Bench Telecom (AA run)Claude Fable 5 by 76.998.521.6+76.9
- Artificial Analysis Coding IndexClaude Fable 5 by 66.976.59.6+66.9
- AA Agentic IndexClaude Fable 5 by 51510+51
- AA IntelligenceClaude Fable 5 by 41.249.68.4+41.2
Questions people ask
Which is better, Claude Fable 5 or Nanbeige4.1-3B?
Claude Fable 5 wins five of the six areas where both have results: coding, agents, reasoning, long documents and following instructions. Nanbeige4.1-3B wins none. They are level on facts.
Which is better for coding?
Claude Fable 5. It wins 2 of the 2 coding tests both models report; Nanbeige4.1-3B wins none.
How do you compare the two?
We use the 16 benchmark tests both models have published scores on. The verdict counts the 11 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 5 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.