Qwen: Qwen3 Next 80B A3B Thinking

Generates explicit, machine-readable thinking traces before producing final responses using an internal chain-of-thought mechanism that decomposes complex problems into intermediate reasoning steps. The model outputs structured thinking blocks (likely XML or JSON-formatted) that expose its reasoning process, enabling users to audit decision paths and identify where reasoning breaks down. This differs from hidden reasoning by making the cognitive process transparent and parseable.

Solves complex mathematical problems including proofs, symbolic manipulation, and multi-equation systems by decomposing them into sequential logical steps with explicit intermediate calculations. The model applies formal reasoning patterns (induction, contradiction, algebraic transformation) and outputs step-by-step derivations that can be validated against known mathematical rules. This capability leverages the 80B parameter scale and reasoning-first architecture to handle problems requiring deep logical chains.

Generates code solutions for complex programming problems by first reasoning through the algorithmic approach, data structure choices, and edge cases before writing implementation. The model outputs its thinking process (algorithm selection, complexity analysis, potential pitfalls) as structured traces, followed by executable code. This enables developers to understand not just the 'what' (the code) but the 'why' (design decisions and trade-offs).

Breaks down complex, multi-step tasks into executable sub-tasks with explicit reasoning about dependencies, resource requirements, and success criteria. The model outputs a structured plan (likely DAG or sequential steps) with reasoning traces explaining why each step is necessary and how it contributes to the overall goal. This enables agents to understand not just the action sequence but the rationale behind it, improving robustness and error recovery.

Solves logic puzzles, constraint satisfaction problems, and formal reasoning tasks by explicitly working through logical implications, contradiction detection, and constraint propagation. The model outputs reasoning traces showing how it eliminates possibilities, applies logical rules, and arrives at conclusions. This capability leverages structured thinking to handle problems requiring careful logical tracking (e.g., Sudoku, graph coloring, satisfiability).

Analyzes buggy code by reasoning through execution flow, identifying where assumptions break, and tracing the root cause of failures. The model outputs reasoning traces showing how it simulates code execution, identifies incorrect logic, and explains why the bug occurs before proposing fixes. This differs from simple code review by explicitly exposing the debugging thought process.

Validates solutions to complex problems by reasoning through correctness criteria, checking edge cases, and identifying potential flaws before the solution is deployed. The model outputs reasoning traces showing how it verifies each aspect of a solution (correctness, efficiency, robustness) and flags potential issues. This enables developers to catch problems early in the development cycle.

Maintains reasoning context across multiple conversation turns, building on previous reasoning traces and conclusions to handle follow-up questions and refinements. The model tracks assumptions, intermediate results, and logical dependencies across turns, enabling coherent multi-step conversations where later responses reference and build on earlier reasoning. This requires maintaining state and context across API calls.