GPT-4o vs Qwen3.5 0.8B
Wins 6 of 7 areas
Coding · Reasoning · Facts · Images and charts · Long documents · Following instructions
Wins 0 of 7 areas
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GPT-4o is the stronger all-rounder.
Scores updated · 29 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 software20GPT-4o2 of 2 tests
- FactsGetting facts right instead of making them up20GPT-4o2 of 2 tests
- Long documentsFinding answers in very long texts20GPT-4o2 of 2 tests
- Following instructionsDoing exactly what it is asked20GPT-4o2 of 2 tests
- ReasoningHard problems that need careful thinking10GPT-4o1 of 3 tests · 2 ties
- Images and chartsUnderstanding pictures, charts and video10GPT-4o1 of 1 test
- AgentsCarrying out multi-step tasks on its own00Even0 each · 1 tie
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 GPT-4o pulls ahead
- Reasons across sets of long documentsAA-LCR+47points ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+41.5points ahead
- Harder college exam questions with imagesMMMU-Pro+30.5points ahead
Where Qwen3.5 0.8B pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 29 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-4o
- SciCodeGPT-4o by 33.333.30+33.3
- Terminal-Bench HardGPT-4o by 8.38.30+8.3
ReasoningGPT-4o
- GPQA DiamondGPT-4o by 41.552.611.1+41.5
- Humanity's Last Examtie1.81.1tie
- CritPttie00tie
FactsGPT-4o
- AA-Omniscience · Non-hallucinationGPT-4o by 23.462.138.7+23.4
- AA-Omniscience · AccuracyGPT-4o by 19.523.74.2+19.5
Long documentsGPT-4o
- AA-LCRGPT-4o by 47569+47
- LongBench v2GPT-4o by 2248.126.1+22
Following instructionsGPT-4o
- Multi-ChallengeGPT-4o by 21.440.318.9+21.4
- IFBenchGPT-4o by 14.53621.5+14.5
Other results16 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 (Retail)GPT-4o by 56.463.47+56.4
- AA-OmniscienceGPT-4o by 44-10.5-54.5+44
- MMMLUGPT-4o by 37.181.444.3+37.1
- MMLU-ProGPT-4o by 32.474.742.3+32.4
- MMLU-ReduxGPT-4o by 28.58859.5+28.5
- MMLU-ProXGPT-4o by 26.561.134.6+26.5
- C-EvalGPT-4o by 25.57650.5+25.5
- Artificial Analysis Coding IndexGPT-4o by 24.224.20+24.2
- SuperGPQAGPT-4o by 21.142.421.3+21.1
- τ²-Bench Telecom (AA run)Qwen3.5 0.8B by 18.828.947.7+18.8
- MATH-500 (EM)GPT-4o by 1774.657.6+17
- IFEvalGPT-4o by 9.88171.2+9.8
- AIME 2024GPT-4o by 3.69.35.7+3.6
- AIME 2025GPT-4o by 311.78.7+3
- AA Agentic IndexGPT-4o by 2.78.45.7+2.7
- AA IntelligenceGPT-4o by 1.27.36.1+1.2
Questions people ask
Which is better, GPT-4o or Qwen3.5 0.8B?
GPT-4o wins six of the seven areas where both have results: coding, reasoning, facts, images and charts, long documents and following instructions. Qwen3.5 0.8B wins none. They are level on agents.
Which is better for coding?
GPT-4o. It wins 2 of the 2 coding tests both models report; Qwen3.5 0.8B wins none.
How do you compare the two?
We use the 29 benchmark tests both models have published scores on. The verdict counts the 13 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 16 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.