LIVE INTELLIGENCE · part of the Xentir AI Index

Claude Opus 4.1 vs Qwen 3.6 Flash (2026-04-16)

Claude Opus 4.1 · Anthropic, released 2025-08-05
Qwen 3.6 Flash (2026-04-16) · Alibaba, released 2026-04-27

“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-07-26 · Methodology · Data Sources

Head-to-head

Measured on 6 of 9 tracked benchmarks for both models — Claude Opus 4.1 leads on 3, Qwen 3.6 Flash (2026-04-16) leads on 3.

Benchmark	Claude Opus 4.1	Qwen 3.6 Flash (2026-04-16)	Leads
Epoch Capabilities Index (ECI)	144.2	144.2	Claude Opus 4.1
SWE-bench Verified	0.733	Not measured	Not measured on both
GPQA Diamond	0.773 (16k)	0.844	Qwen 3.6 Flash (2026-04-16)
MATH Level 5	Not measured	Not measured	Not measured on both
OTIS Mock AIME 2024-2025	0.689 (27k)	0.861	Qwen 3.6 Flash (2026-04-16)
FrontierMath	0.072 (27k)	0.103	Qwen 3.6 Flash (2026-04-16)
FrontierMath Tier 4	0.042 (27k)	0.000	Claude Opus 4.1
SimpleQA Verified	0.348 (27k)	0.212	Claude Opus 4.1
Chess Puzzles	Not measured	0.172	Not measured on both

Benchmark results measure specific tasks and should not be treated as a universal measure of model quality. A model with no row here for a benchmark has not been measured on it — that is left blank, never estimated.

Full profiles

Claude Opus 4.1 → · Qwen 3.6 Flash (2026-04-16) → · the full AI Model Rankings table