Qwen3.5 4B · deepinfra

Qwen3.5-4B is a mid-size model from Alibaba's Qwen3.5 series that delivers a strong balance of performance and efficiency. It features a 262K token context window (extensible to 1M with YaRN), thinking/reasoning mode, tool calling, and support for 201 languages. Well-suited for complex reasoning, code generation, and agentic applications.

Base modelAll models on this baseAll models of the providerto the provider

Read also: Qwen API pricing: Qwen3.8 Max, Plus, Flash, 27B and the open models at every provider

All Qwen models at every provider

Input, $/1M $0.03

Output, $/1M $0.15

Context 262 144

Accepts —

Last checked 04.11.2026 12:00:14 UTC

Source —