April 2026 marks the most competitive three-way frontier model race in AI history. Qwen 3.6 Plus, Claude Opus 4.6, and GPT-5.4 all cross the 1-million-token context threshold. Here's exactly where each model wins, loses, and what it means for developers.
Qwen 3.6 Plus is currently free on OpenRouter with no credit card required. This guide covers API access, code examples in Python and JavaScript, function calling, reasoning features, best use cases, and practical limitations.
