Claude Opus 4.7 vs Qwen3.5 (397B-A17B)

Pick two tools from the same category to compare side-by-side.

	Claude Opus 4.7 Anthropic's deepest-reasoning model; planning, complex synthesis.	Qwen3.5 (397B-A17B) Alibaba's Apache-2.0 open-weight Qwen3.5 flagship MoE with very low active-parameter cost and broad multilingual coverage.
Category	model	model
Vendor type	commercial	open source
Pricing	usage	free
Strengths	+ Deepest reasoning of the Claude family + Best for ambiguous, planning-heavy tasks	+ Permissive Apache 2.0 license + Only 17B active parameters, enabling comparatively cheap inference + First-class MCP and tool-calling support via Qwen-Agent + 201-language coverage for multilingual agents
Tradeoffs	− Highest cost tier — not viable as default model − Higher latency than Sonnet / Haiku	− Long context beyond 262K requires YaRN extension rather than native support − Flagship commercial Qwen3-Max capabilities are not part of the open release
Used in stacks	6	0