Qwen3.5 0.8B vs Qwen3.5 4B
Wins 0 of 7 areas
—
Wins 6 of 7 areas
Coding · Agents · Reasoning · Images and charts · Long documents · Following instructions
Qwen3.5 4B is the stronger all-rounder.
Scores updated · 31 tests both models report · How we compare
Where each one wins
Tests won in each of the seven 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 software03Qwen3.5 4B3 of 3 tests
- ReasoningHard problems that need careful thinking02Qwen3.5 4B2 of 3 tests · 1 tie
- Long documentsFinding answers in very long texts02Qwen3.5 4B2 of 2 tests
- Following instructionsDoing exactly what it is asked02Qwen3.5 4B2 of 2 tests
- AgentsCarrying out multi-step tasks on its own01Qwen3.5 4B1 of 1 test
- Images and chartsUnderstanding pictures, charts and video01Qwen3.5 4B1 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Agents and images and charts 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 Qwen3.5 4B pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+66points ahead
- Reasons across sets of long documentsAA-LCR+54points ahead
- Harder college exam questions with imagesMMMU-Pro+39.6points ahead
Where Qwen3.5 0.8B pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+25.3points ahead
Every test, side by side
All 31 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingQwen3.5 4B
- Terminal-Bench 2.1Qwen3.5 4B by 25.8025.8+25.8
- Terminal-Bench HardQwen3.5 4B by 18.2018.2+18.2
- SciCodeQwen3.5 4B by 16.1016.1+16.1
ReasoningQwen3.5 4B
- GPQA DiamondQwen3.5 4B by 6611.177.1+66
- Humanity's Last ExamQwen3.5 4B by 8.81.19.9+8.8
- CritPttie00tie
FactsEven
- AA-Omniscience · Non-hallucinationQwen3.5 0.8B by 25.338.713.4+25.3
- AA-Omniscience · AccuracyQwen3.5 4B by 10.94.215.1+10.9
Long documentsQwen3.5 4B
- AA-LCRQwen3.5 4B by 54963+54
- LongBench v2Qwen3.5 4B by 23.926.150+23.9
Following instructionsQwen3.5 4B
- IFBenchQwen3.5 4B by 30.521.552+30.5
- Multi-ChallengeQwen3.5 4B by 30.118.949+30.1
Other results17 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.
- t2-benchQwen3.5 4B by 68.311.679.9+68.3
- τ²-Bench (Retail)Qwen3.5 4B by 64.9771.9+64.9
- τ²-Bench Telecom (AA run)Qwen3.5 4B by 44.447.792.1+44.4
- MMLU-ProXQwen3.5 4B by 36.934.671.5+36.9
- MMLU-ProQwen3.5 4B by 36.842.379.1+36.8
- C-EvalQwen3.5 4B by 34.650.585.1+34.6
- MMMLUQwen3.5 4B by 31.844.376.1+31.8
- SuperGPQAQwen3.5 4B by 31.621.352.9+31.6
- BFCL v3Qwen3.5 4B by 31.539.671.1+31.5
- IncludeQwen3.5 4B by 30.440.671+30.4
- MMLU-ReduxQwen3.5 4B by 29.359.588.8+29.3
- AA Agentic IndexQwen3.5 4B by 26.85.732.5+26.8
- BFCLv4Qwen3.5 4B by 25.325.350.6+25.3
- Artificial Analysis Coding IndexQwen3.5 4B by 22.6022.6+22.6
- IFEvalQwen3.5 4B by 1571.286.2+15
- AA IntelligenceQwen3.5 4B by 76.113.1+7
- AA-OmniscienceQwen3.5 0.8B by 3.8-54.5-58.4+3.8
Questions people ask
Which is better, Qwen3.5 0.8B or Qwen3.5 4B?
Qwen3.5 4B wins six of the seven areas where both have results: coding, agents, reasoning, images and charts, long documents and following instructions. Qwen3.5 0.8B wins none. They are level on facts.
Which is better for coding?
Qwen3.5 4B. It wins 3 of the 3 coding tests both models report; Qwen3.5 0.8B wins none.
How do you compare the two?
We use the 31 benchmark tests both models have published scores on. The verdict counts the 14 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 17 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.