Qwen3 235B Thinking (2507) is the extended chain-of-thought reasoning variant — the world's largest open model in deep-think mode, capable of step-by-step analysis rivaling the best closed-source reasoning models.
Qwen3 235B Thinking (Jul 25) is an AI model released July 2025 by Qwen, a leading organization in large language model research. Thinking-mode Qwen3-235B — always uses extended chain-of-thought. Best for math olympiad problems, scientific reasoning, and agentic tasks. With 235B total (22B active) and a 128K tokens context window, Qwen3 235B Thinking (Jul 25) is designed to excel across a range of demanding tasks — from software engineering and mathematical problem-solving to multilingual content generation and long-document analysis.
Qwen3 235B Thinking (Jul 25) employs a Mixture-of-Experts (MoE) architecture with 235B total (22B active). In a MoE design, only a subset of "expert" sub-networks activates for each token during inference — Qwen3 235B Thinking (Jul 25) has 235B total (22B active) total parameters but uses only a fraction per token. This allows the model to store significantly more learned knowledge than a comparably-priced dense model. MoE architectures have proven effective at reaching frontier-level capability while keeping serving costs manageable — a key reason Qwen3 235B Thinking (Jul 25) can be offered at the scale that platforms like LITHOVEX AI make possible.
As of 2026-10-16, Qwen3 235B Thinking (Jul 25) by Qwen demonstrates measurable performance on standard AI evaluation benchmarks. On AIME 2025 — which tests advanced competition mathematics at the highest US high school level — it achieves 87.0%. For software engineering tasks, Qwen3 235B Thinking (Jul 25) scores 72.5% on LiveCodeBench, which tests practical software engineering. In mathematical reasoning, Qwen3 235B Thinking (Jul 25) records 87.0% on AIME 2025. Across all 4 benchmarks tracked, the model shows consistent capability in its primary task domains. These scores place Qwen3 235B Thinking (Jul 25) — at 235B total (22B active) of parameters — in a competitive position within its model class. Note that benchmark scores reflect controlled evaluation conditions; real-world performance varies by task, prompt design, and domain specificity.
The primary strengths of Qwen3 235B Thinking (Jul 25) are: Improved thinking mode with July 2025 update; Elite mathematical and reasoning benchmarks; Apache 2.0. These make it particularly well-suited for Frontier reasoning tasks with July 2025 improvements. Users working on complex, multi-step problems benefit most from Qwen3 235B Thinking (Jul 25)'s ability to maintain coherence across long inputs and produce structured, verifiable outputs.
Like all current AI systems, Qwen3 235B Thinking (Jul 25) has limitations: Thinking mode adds latency; Large compute requirements. For production deployments, validating outputs against authoritative sources — especially for domain-specific or time-sensitive information — remains best practice. Qwen continues to improve Qwen3 235B Thinking (Jul 25) through ongoing research.
Qwen3 235B Thinking (Jul 25) is available on LITHOVEX AI with a free account. Unlike direct API access — which requires billing setup, API key management, and per-token charges — LITHOVEX AI provides a seamless browser interface with no setup required, making Qwen3 235B Thinking (Jul 25) accessible to students, researchers, developers, and early-stage teams globally.
As of 2026-10-16, Qwen3 235B Thinking (Jul 25) by Qwen demonstrates measurable performance on standard AI evaluation benchmarks. On AIME 2025 — which tests advanced competition mathematics at the highest US high school level — it achieves 87.0%. For software engineering tasks, Qwen3 235B Thinking (Jul 25) scores 72.5% on LiveCodeBench, which tests practical software engineering. In mathematical reasoning, Qwen3 235B Thinking (Jul 25) records 87.0% on AIME 2025. Across all 4 benchmarks tracked, the model shows consistent capability in its primary task domains. These scores place Qwen3 235B Thinking (Jul 25) — at 235B total (22B active) of parameters — in a competitive position within its model class. Note that benchmark scores reflect controlled evaluation conditions; real-world performance varies by task, prompt design, and domain specificity.
MoE 235B/22B with extended reasoning — July 2025 update
The training pipeline for Qwen3 235B Thinking (Jul 25) involves multiple stages: large-scale pretraining on diverse multilingual text and code corpora to develop broad world knowledge, followed by supervised fine-tuning on instruction-response pairs, and alignment techniques such as RLHF or DPO. Each stage refines the model's helpfulness, accuracy, and safety. Qwen's research team — based in China — has optimized Qwen3 235B Thinking (Jul 25) for the specific capability profile described above.
Inference efficiency: Qwen3 235B Thinking (Jul 25) at 235B total (22B active) is designed to deliver quality outputs at practical serving speeds. Its 128K tokens context window enables processing entire documents, multi-file codebases, and extended conversation histories — particularly valuable for contract review, technical documentation analysis, and codebase-level AI assistance.
Getting started with Qwen3 235B Thinking (Jul 25) on LITHOVEX AI takes under two minutes. Follow these steps:
For best results with Qwen3 235B Thinking (Jul 25): provide specific, context-rich prompts; include examples when generating code; specify output format when structure matters; break complex tasks into focused sub-questions. Since Qwen3 235B Thinking (Jul 25) supports extended reasoning, prompting it to "think step by step" or "show your reasoning" activates deeper chain-of-thought analysis for math, logic, and complex problems.
Competition mathematics and olympiad problem solving
Complex multi-step scientific inference
Adversarial legal argument analysis
Deep financial modeling and scenario analysis
AI safety research requiring frontier reasoning
Qwen (Tongyi Qianwen) is the AI model family from Alibaba Cloud, the cloud computing arm of Alibaba Group — one of the world's largest technology companies with over $100 billion in annual revenue. Alibaba invested in AI research through its DAMO Academy starting in 2017. The Qwen3 generation, released in April 2025, represents a major leap in open-model capability: models from 8B to 235B parameters, with hybrid thinking modes and 119-language support, all released under Apache 2.0 licenses for commercial use. Qwen models consistently rank at the top of the Open LLM Leaderboard and have been widely adopted across Asia, Europe, and North America for both commercial and research applications.
Funding: Part of Alibaba Group (NYSE: BABA, $100B+ annual revenue)
Founded: 1999, headquartered in China.
Qwen3 235B Thinking (Jul 25) by Qwen competes in a field with several strong alternatives. Below is a detailed side-by-side comparison against commonly listed alternatives, using benchmark data and capability profiles in the catalog.
Both Qwen3 235B Thinking (Jul 25) and the models above are available free on LITHOVEX AI — test them side by side on your real tasks before committing to a subscription with any provider.
Qwen3 235B Thinking (Jul 25) is released under Apache 2.0, which means you can download and run it on your own hardware. Below are the quickest ways to get started.
LITHOVEX AI runs Qwen3 235B Thinking (Jul 25) on cloud infrastructure, so you can use it instantly in your browser without downloading anything, configuring drivers, or managing VRAM. Create a free account and start in under 60 seconds.
The Thinking variant of Qwen3 235B activates extended reasoning mode for every query — ideal for competition mathematics, complex scientific inference, and multi-step legal analysis. Used by researchers globally for tasks requiring the highest reasoning depth available in open-weight models.
Qwen3 235B Thinking (Jul 25) by Qwen has the following version history and notable updates:
For the complete changelog and latest release notes, visit the official Qwen model page.