Qwen 3.7 Max: Drop-In Anthropic SDK Swap in Python
Summary
Point the Anthropic SDK at Qwen 3.7 Max with one base-URL change: 1M context, thinking, caching.
On May 19, 2026 Alibaba quietly flipped on the Qwen 3.7 Max API, then announced it the next day at the Alibaba Cloud Summit. Within hours it was the top thread across r/LocalLLaMA and the AI corners of Hacker News, for one reason: it is the first non-Anthropic model that speaks the Anthropic Messages protocol natively, at roughly half the input price of Claude Opus 4.7.
That means you can take an app already built on Claude, change a base URL and a model id, and route it to Qwen. No translation shim, no rewriting your tool-use schemas. People are pointing Claude Code at it and cutting coding-agent bills by about 3x on the same harness.
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