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ModelCap

Qwen3.5 2B

Official publisher releaseOpen weights

Qwen·#153 of 350 on the current board

Qwen3.5 2B is a language model from Qwen. It ranks #153 of 350 on ModelCap's current board, with an Index score of 40.8, modeled from the publisher's launch results against measured models. Its score range of 19.9–61.6 spans positions #67–#288. Its weights are openly downloadable.

Figures as of 24 Oct 2026, 19:29 UTC · download the public dataset · methodology

ModelCap Index · Current board
40.8#153
Modeled from the publisher's launch results against measured models · range 19.9–61.6
Market Gravity
16.9
Secondary market signal

OpenRouter endpoint status could not be refreshed. This model is not treated as currently served until a successful observation arrives.

Input
Self-hosted
weights only · no listed API price
Output
Self-hosted
weights only · no listed API price
Context
—
tokens
Providers
0
endpoints

Providers

Uptime measured over the last 30 minutes

Current provider status is unavailable.

Reported evaluation leads (15)

Not independent measurement

Structured rows reported in this exact model repository at the pinned revision below. They are the publisher talking about itself: never measured evidence, never a score input on their own. Rows marked as used were laddered against independently measured peers inside the launch-card channel of this model's modeled placement, with the replay-measured optimism haircut applied; the others played no part.

Dataset / taskMetricValueRevisionProvenance
Idavidrein/gpqa
diamond
—44.9495
Unpinned
not published
Reported
Not used in launch estimate
likaixin/ScreenSpot-Pro
overall
—54.5
Unpinned
not published
Reported
Not used in launch estimate
LiquidAI/ifstruct-v1.0
ifstruct_v1
—33.15
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ExtractBench
mean
—63.4
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ExtractBench
short
—71.22
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ExtractBench
medium
—50.93
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ExtractBench
long
—25.93
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ParseBench
mean
—27.3
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ParseBench
text_content
—87.2
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ParseBench
text_formatting
—31.1
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ParseBench
layout
—18.3
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ParseBench
chart
—0.1
Unpinned
not published
Reported
Not used in launch estimate
llamaindex/ParseBench
table
—0
Unpinned
not published
Reported
Not used in launch estimate
MMMU/MMMU_Pro
mmmu_pro_vision
—50.3
Unpinned
not published
Reported
Not used in launch estimate
TIGER-Lab/MMLU-Pro
mmlu_pro
—55.3
Unpinned
not published
Reported
Not used in launch estimate

ModelCap Index · Current board

Methodology
40.8
Modeled from the publisher's launch results against measured models
Current board
#153 of 350
Score range
19.9–61.6
Rank range
#67–#288
Technical details
Public rank basis
Modeled · peer benchmarks (architecture)
Evidence label
Modeled · peer benchmarks · 7 reported rows against measured corpus ladders (51%); publisher-corpus-prior over 211 held-out anchors (49%); shrunk 8.5 up toward the measured corpus
Index support
29.4% · limited
Identity binding
Exact catalogue product · qwen/Qwen/Qwen3.5-2B · aggregates disclosed benchmark configurations · endpoint configuration not claimed · artifact metadata Qwen/Qwen3.5-2B@15852e8c16360a2fea060d615a32b45270f8a8fc (not the evaluation revision)
Index observations used
0
Qualified Index evidence point
40.8
How this position was produced · fused launch placement

No general-family board lists this model yet. Its point estimate is the precision-weighted mean of every channel that spoke for it; each channel’s share is the weight it carried. Independent measurements replace this placement as boards list the model.

Fused estimate
40.8 ± 16.3
Independent share
0%
Shrink toward corpus
+8.5
Optimism haircut
None applied
Method
precision-weighted-v1
Channels fused into this model’s launch placement
ChannelEstimateShare
Corpus ladder · not independent
7 reported rows against measured corpus ladders
32.3 ± 22.851%
Publisher corpus prior · not independent
publisher-corpus-prior over 211 held-out anchors
49.7 ± 23.349%
Bayesian Evidence Score · measured evidence input only

BES normalizes admitted public benchmark evidence for measured Index rows. Its legacy score and observables prior do not define the public language rank.

Observed capability
—
Evidence status
No admitted measured evidence
General preference
—
Coding
—
Agents & tools
—
Reasoning
—
Evidence breadth
0%
Evidence coverage
0%
Market and catalogue signals · secondary, never the language Index rank
Usage (OpenRouter popularity)
—
Liquidity (providers × uptime)
—
Open reach (HF downloads)
98.9
Surface (context / tools / modalities)
15.0
Freshness
40.4
  • · HF 30d downloads 3145552
  • · Catalogue: modalities Text/Image
  • · First seen 2026-02-28

These adoption and deployment observations remain context only. They do not change this model's ModelCap Index score or rank.

The bounded 0–100 capability score blends each source’s competitive placement with its published achievement, then combines capability families. Evidence breadth adds a modest uncertainty adjustment; price and popularity are not part of benchmark-led rank.

Experimental capability estimate

Estimate policy
16.3
0.4–32.1 uncertainty interval
Excluded from rank
Confidence
71%
Training support
221 models · 129 lineages
Out-of-domain check
in domain
Feature coverage
71%
Lineage-held-out error
8.3 MAE

Experimental estimate. This layer predicts from admitted evidence and safe metadata only. It never enters ModelCap Score or rank.

Deployment readiness

Metadata index
52.4
partial · 56% metadata coverage
Not capability
Artifact reproducibility
100.0
Access & legal clarity
100.0
Deployability
8.0
Evaluation provenance
0.0

Not yet published: a current serving provider, measured provider uptime, published provider pricing, declared context and output limits, admitted benchmark results, results across several capability areas, results from more than one source, a confident match to its benchmark entries, pinned evaluation dataset versions.

A metadata completeness and deployability index—not a safety certification, quality grade, or production-readiness claim.

Market activity

Venue coverage
Market Gravity
16.9
OpenRouter weekly popularity
Not listed

Market Gravity uses OpenRouter’s full-catalogue popularity order. Sparse Vercel top-ten observations appear only when published and do not affect the score.

Arena preference

No matched Arena rating

This model is visible because it is available in the live catalogue, but it has no trustworthy community result yet. ModelCap does not infer a quality score from price, features, or market activity.

Market Gravity breakdown

Usage55%
0.0

OpenRouter weekly popularity across the full model catalogue.

Liquidity25%
0.0

Independent providers versus the model's open or closed cohort, weighted by uptime.

Open reach15%
98.9

Hugging Face 30-day downloads for open models; neutral for closed models.

Freshness5%
40.4

Time since first public availability, on a six-month half-life.

Specification

Model ID
Qwen/Qwen3.5-2B
Declared output cap
Unknown

OpenRouter catalogue or provider-endpoint declaration. Limits can vary by provider and prompt length; a model-wide maximum has not been independently verified. OpenRouter metadata

Inputs
Text, Image
Outputs
Text
Cached input tokens
Not offered
First seen on OpenRouter
28 Feb 2026

Capabilities

  • Not supported: Reasoning
  • Not supported: Tool use
  • Not supported: Structured output
  • Not supported: Response format
  • Not supported: Moderated

Weights & access

Open weights. Downloadable weights are published under an OSI or free-culture license in the current repository metadata. This describes weight availability, not whether the full training stack qualifies as Open Source AI.

Access
Open weights
Licence
apache-2.0
Pinned revision
15852e8c1636
Parameters
2.3B
Architecture
Qwen3_5ForConditionalGeneration
Model type
qwen3_5
Hugging Face downloads (30d)
3.1M
Downloads (all time)
20.4M
Likes
454
Repository
Qwen/Qwen3.5-2B
Repository updated
2 Mar 2026, 11:26 UTC

Compare Qwen3.5 2B with

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Benchmark leaderboards featuring Qwen3.5 2B

All leaderboards
Public benchmark boards on which Qwen3.5 2B has a published result
LeaderboardScoreSource rankConfigurationPublished
Terminal-Bench 2.1 (Artificial Analysis run)Artificial Analysis3.0%#114 of 124Reasoning1 Oct 2026
τ²-Bench Telecom (Artificial Analysis run)Artificial Analysis69.0%#51 of 152Reasoning13 Sept 2026
Humanity's Last Exam (Artificial Analysis run)Artificial Analysis2.6%#263 of 265Reasoning13 Sept 2026

Alternatives to Qwen3.5 2B, by the numbers

Ranked neighbours

Models within 3 places of #153 on the ModelCap Index.

Other ranked Qwen models

The same publisher's other current models with a public Index position.

Qwen3.5 2B: common questions

How does Qwen3.5 2B rank among AI models?

Qwen3.5 2B holds ModelCap Index position #153 of 350 ranked language models as of 24 October 2026, with an Index score of 40.8 (interval 19.9–61.6); evidence: modeled · peer benchmarks. The Index combines public benchmark boards with published uncertainty; the methodology page explains the weighting.

How much does Qwen3.5 2B cost per 1M tokens?

No live API price is listed for Qwen3.5 2B in the current snapshot as of 24 October 2026 because the latest endpoint refresh was unavailable. ModelCap shows a price only when a provider currently lists one.

Is Qwen3.5 2B open-weight?

Open weights (apache-2.0). Downloadable weights are published under an OSI or free-culture license in the current repository metadata. This describes weight availability, not whether the full training stack qualifies as Open Source AI. The repository is Qwen/Qwen3.5-2B on Hugging Face.

Which benchmarks has Qwen3.5 2B been evaluated on?

Qwen3.5 2B has published results on 3 public boards tracked by ModelCap as of 24 October 2026: AA Terminal-Bench 2.1 3.0% (#114 of 124), AA τ²-Bench Telecom 69.0% (#51 of 152) and AA Humanity's Last Exam 2.6% (#263 of 265). Each board page ranks every tracked model on that benchmark. The ModelCap Index scores the results its methodology admits, with published uncertainty, and shows reference boards without scoring them.

How does Qwen3.5 2B compare with Qwen3.5 4B?

Qwen3.5 2B ranks #153 (Index 40.8) and Qwen3.5 4B ranks #152 (Index 41.0) on the ModelCap Index as of 24 October 2026. The head-to-head page lines up their benchmarks, listed prices, context windows and provider counts side by side.

When was Qwen3.5 2B released?

Qwen3.5 2B first appeared in the catalogue on 28 Feb 2026. It is the current version in its family. Rank and price movements since then are recorded on the site's changes feed.