Claude Opus 4.5 vs Qwen3.5 Omni Plus
Wins 6 of 7 areas
Coding · Agents · Reasoning · Images and charts · Long documents · Following instructions
Wins 0 of 7 areas
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Claude Opus 4.5 is the stronger all-rounder.Qwen3.5 Omni Plus is cheaper.
Scores updated · 16 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.
- ReasoningHard problems that need careful thinking30Claude Opus 4.53 of 3 tests
- CodingWriting and fixing software20Claude Opus 4.52 of 2 tests
- AgentsCarrying out multi-step tasks on its own10Claude Opus 4.51 of 1 test
- Images and chartsUnderstanding pictures, charts and video10Claude Opus 4.51 of 1 test
- Long documentsFinding answers in very long texts10Claude Opus 4.51 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Opus 4.51 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Agents, images and charts, 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.
Qwen3.5 Omni Plus costs 83% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude Opus 4.5 pulls ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+29.2points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+25.8points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+15.2points ahead
Where Qwen3.5 Omni Plus pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+24points 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 Opus 4.5
- Terminal-Bench HardClaude Opus 4.5 by 25.84721.2+25.8
- SciCodeClaude Opus 4.5 by 949.540.5+9
ReasoningClaude Opus 4.5
- Humanity's Last ExamClaude Opus 4.5 by 15.230.114.9+15.2
- CritPtClaude Opus 4.5 by 44.60.6+4
- GPQA DiamondClaude Opus 4.5 by 486.682.6+4
FactsEven
- AA-Omniscience · AccuracyClaude Opus 4.5 by 29.246.617.4+29.2
- AA-Omniscience · Non-hallucinationQwen3.5 Omni Plus by 243963+24
Images and chartsClaude Opus 4.5
- MMMU-ProClaude Opus 4.5 by 3.57470.5+3.5
Following instructionsClaude Opus 4.5
- IFBenchClaude Opus 4.5 by 6.85851.2+6.8
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 Opus 4.5 by 27.114-13.1+27.1
- Artificial Analysis Coding IndexClaude Opus 4.5 by 20.247.827.6+20.2
- AA IntelligenceClaude Opus 4.5 by 8.729.120.4+8.7
- AA Agentic IndexClaude Opus 4.5 by 6.859.652.8+6.8
- τ²-Bench Telecom (AA run)Claude Opus 4.5 by 1.289.588.3+1.2
Questions people ask
Which is better, Claude Opus 4.5 or Qwen3.5 Omni Plus?
Claude Opus 4.5 wins six of the seven areas where both have results: coding, agents, reasoning, images and charts, long documents and following instructions. Qwen3.5 Omni Plus wins none, but costs 83% less. They are level on facts.
Which is better for coding?
Claude Opus 4.5. It wins 2 of the 2 coding tests both models report; Qwen3.5 Omni Plus wins none.
Which is cheaper?
Claude Opus 4.5 costs $5.00 per million input tokens and $25.00 per million output tokens; Qwen3.5 Omni Plus costs $0.40 and $4.80. That makes Qwen3.5 Omni Plus about 83% cheaper for the same work.
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.