Claude Haiku 4.5 vs Nanbeige4.1-3B
Wins 5 of 6 areas
Coding · Agents · Facts · Long documents · Following instructions
Wins 1 of 6 areas
Reasoning
Claude Haiku 4.5 is the stronger all-rounder.Nanbeige4.1-3B is better at reasoning.
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.
- CodingWriting and fixing software20Claude Haiku 4.52 of 2 tests
- AgentsCarrying out multi-step tasks on its own20Claude Haiku 4.52 of 2 tests
- FactsGetting facts right instead of making them up20Claude Haiku 4.52 of 2 tests
- Long documentsFinding answers in very long texts10Claude Haiku 4.51 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Haiku 4.51 of 1 test
- ReasoningHard problems that need careful thinking01Nanbeige4.1-3B1 of 3 tests · 2 ties
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 Haiku 4.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+30.8points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+18.9points ahead
- Code for real scientific research problemsSciCode+15.6points ahead
Where Nanbeige4.1-3B pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+17.7points 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 Haiku 4.5
- Terminal-Bench HardClaude Haiku 4.5 by 27.327.30+27.3
- SciCodeClaude Haiku 4.5 by 15.642.226.6+15.6
AgentsClaude Haiku 4.5
- GDPValClaude Haiku 4.5 by 11.811.80+11.8
- τ-Bench V3 · BankingClaude Haiku 4.5 by 9.39.30+9.3
ReasoningNanbeige4.1-3B
- GPQA DiamondNanbeige4.1-3B by 17.767.284.9+17.7
- Humanity's Last Examtie10.410.9tie
- CritPttie00tie
FactsClaude Haiku 4.5
- AA-Omniscience · Non-hallucinationClaude Haiku 4.5 by 30.872.741.9+30.8
- AA-Omniscience · AccuracyClaude Haiku 4.5 by 8.1189.9+8.1
Following instructionsClaude Haiku 4.5
- IFBenchClaude Haiku 4.5 by 18.954.335.4+18.9
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 Haiku 4.5 by 38.1-4.4-42.5+38.1
- Artificial Analysis Coding IndexClaude Haiku 4.5 by 34.343.99.6+34.3
- τ²-Bench Telecom (AA run)Claude Haiku 4.5 by 33.154.721.6+33.1
- AA Agentic IndexClaude Haiku 4.5 by 10.310.30+10.3
- AA IntelligenceClaude Haiku 4.5 by 8.516.98.4+8.5
Questions people ask
Which is better, Claude Haiku 4.5 or Nanbeige4.1-3B?
Claude Haiku 4.5 wins five of the six areas where both have results: coding, agents, facts, long documents and following instructions. Nanbeige4.1-3B wins reasoning.
Which is better for coding?
Claude Haiku 4.5. 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.