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qwen/qwen3-235b-a22b-thinking-2507
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Qwen3 235B A22B Thinking 2507

Qwen3-235B-A22B-Thinking-2507 is a high-performance, open-weight Mixture-of-Experts (MoE) language model optimized for complex reasoning tasks. It activates 22B of its 235B parameters per forward pass and natively supports up to 262,144 tokens of context. This "thinking-only" variant enhances structured logical reasoning, mathematics, science, and long-form generation, showing strong benchmark performance across AIME, SuperGPQA, LiveCodeBench, and MMLU-Redux. It enforces a special reasoning mode (</think>) and is designed for high-token outputs (up to 81,920 tokens) in challenging domains. The model is instruction-tuned and excels at step-by-step reasoning, tool use, agentic workflows, and multilingual tasks. This release represents the most capable open-source variant in the Qwen3-235B series, surpassing many closed models in structured reasoning use cases.

7/25/2025
131,072 tokens
#91 Text (Japanese)

Specifications

Modalities

Input
text
Output
text

Supported Parameters

frequency_penalty
include_reasoning
logit_bias
max_tokens
min_p
presence_penalty
reasoning
repetition_penalty
response_format
seed
stop
structured_outputs
temperature
tool_choice
tools
top_k
top_p

Reasoning Configuration

Default
Thinking on
Turning thinking off
Not possible (always thinks)

How to control thinking, and what it costs

Frequently asked questions

Is Qwen3 235B A22B Thinking 2507 available on FastMetal?
Not at the moment. Qwen3.8 Max (0902), from the same lab, is available on the FastMetal API today.
What is the context window of Qwen3 235B A22B Thinking 2507?
131,072 tokens, shared between the prompt and the response.
How does Qwen3 235B A22B Thinking 2507 rank?
#91 on the public arena's Japanese board (ELO 1,378). Ranks move as the leaderboard is updated.

Leaderboard

Text
OverallELO: 1,400
#147
JapaneseELO: 1,378
#91
ChineseELO: 1,456
#115
KoreanELO: 1,362
#107
EnglishELO: 1,405
#160
germanELO: 1,398
#116
spanishELO: 1,387
#144
russianELO: 1,406
#125
CodingELO: 1,443
#149
MathELO: 1,398
#148
Creative WritingELO: 1,370
#143
Instruction FollowingELO: 1,385
#151
Hard PromptsELO: 1,417
#152
Multi-TurnELO: 1,394
#157