Qwen3.5-9B

qwen/qwen3.5-9b-20260310

Qwen3.5-9B is a text, image, and video input model with a text output. It has a context length of 262,144 tokens and costs $0.08 per million input tokens and $0.13 per million output tokens. The model supports tools and reasoning, is open-weight, and was released on February 1, 2026.

  • tool use
  • structured outputs
  • reasoning
  • open-weight

At a glance

providerqwen
releasedFeb 1, 2026
context262K
input / M$0.080

Specifications

What the API gives you

Context window
262K tokens
Max output
66K tokens
Input price
$0.080 / 1M tokens
Output price
$0.13 / 1M tokens
Cache read
$0.040 / 1M tokens
Modalities
text, image, video → text
Knowledge cutoff
—
Released
Feb 1, 2026

Measured evidence

Public benchmark record

GPQA Diamond (Epoch AI)
79% ± 2.42026-08-27evaluated 2026-08-27
OTIS Mock AIME (Epoch AI)
42.8% ± 6.52026-08-27evaluated 2026-08-27

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open. Design Arena uses blind human preference.

Open-weight model on Hugging Face.

Task evidence

How broad is the support?

Each status is exact to this model version and the selected task. Official release claims remain provisional.

  • Best LLM for Math & ReasoningEstablished evidence

    16% of intended weighted task evidence across 2 independent sources. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for Logic & Problem SolvingProvisional evidence

    18% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LiveBench Instruction Following or LiveBench Reasoning. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Competition MathProvisional evidence

    11% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from FrontierMath Tiers 1-3 (Epoch AI) or LiveBench Mathematics. 6 of 6 configured evaluation feeds currently have results.

Recommendation coverage

Where this model appears

Not currently included in a published recommendation. The task evidence panel above says exactly what is confirmed and what is still missing.

Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.