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ModelCap

Qwen SEA LION v4.5 27B IT

Official publisher releaseOpen weights

Aisingapore·#88 of 350 on the current board

Qwen SEA LION v4.5 27B IT is a language model from Aisingapore. It ranks #88 of 350 on ModelCap's current board, with an Index score of 56.1, carried over from the model it is built on. Its score range of 44.0–68.3 spans positions #45–#139. It reads up to 262K tokens of context, and its weights are openly downloadable.

Figures as of 25 Oct 2026, 02:04 UTC · download the public dataset · methodology

ModelCap Index · Current board
56.1#88
Carried over from the model it is built on · range 44.0–68.3
Market Gravity
10.7
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
262K
tokens
Providers
0
endpoints

Providers

Uptime measured over the last 30 minutes

Current provider status is unavailable.

Hugging Face Inference Providers

Exact repository identity

Provider economics and telemetry published by the Hugging Face Router. These are operational signals, not benchmark results.

ProviderInputOutputContextTTFTThroughputFeatures
publicai
live
$0.20$0.40262K1554 ms48.7 tok/stools · structured

ModelCap Index · Current board

Methodology
56.1
Carried over from the model it is built on
Current board
#88 of 350
Score range
44.0–68.3
Rank range
#45–#139
Technical details
Public rank basis
Modeled · lineage (lineage)
Evidence label
Modeled · lineage · finetune of qwen/qwen3.6-27b · finetune (100%)
Index support
15.2% · limited
Identity binding
Exact catalogue product · aisingapore/aisingapore/Qwen-SEA-LION-v4.5-27B-IT · aggregates disclosed benchmark configurations · endpoint configuration not claimed · artifact metadata aisingapore/Qwen-SEA-LION-v4.5-27B-IT@544e416f68a5700c7577547ad48e351e7d294116 (not the evaluation revision)
Index observations used
0
Qualified Index evidence point
56.1
Verified lineage
qwen/qwen3.6-27b · minus 1.2 ( finetune)
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
56.1 ± 9.5
Independent share
0%
Shrink toward corpus
0.0
Optimism haircut
None applied
Method
precision-weighted-v1
Channels fused into this model’s launch placement
ChannelEstimateShare
Verified lineage · not independent
finetune of qwen/qwen3.6-27b · finetune
56.1 ± 9.5100%
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)
53.2
Surface (context / tools / modalities)
65.3
Freshness
53.6
  • · HF 30d downloads 1269
  • · Catalogue: context 262144, tools, modalities Text/Image
  • · First seen 2026-05-14

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
36.8
22.2–51.5 uncertainty interval
Excluded from rank
Confidence
75%
Training support
221 models · 129 lineages
Out-of-domain check
in domain
Feature coverage
86%
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
66.4
partial · 74% metadata coverage
Not capability
Artifact reproducibility
100.0
Access & legal clarity
100.0
Deployability
54.7
Evaluation provenance
0.0

Not yet published: measured provider uptime, 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
10.7
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%
53.2

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

Freshness5%
53.6

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

Specification

Model ID
aisingapore/Qwen-SEA-LION-v4.5-27B-IT
Context window
262K tokens
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
14 May 2026

Capabilities

  • Not supported: Reasoning
  • 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
mit
Pinned revision
544e416f68a5
Parameters
27.8B
Architecture
Qwen3_5ForConditionalGeneration
Model type
qwen3_5
Hugging Face downloads (30d)
1K
Downloads (all time)
25K
Likes
9
Repository updated
24 Aug 2026, 23:59 UTC
Base lineage
Qwen/Qwen3.6-27B

Alternatives to Qwen SEA LION v4.5 27B IT, by the numbers

Ranked neighbours

Models within 3 places of #88 on the ModelCap Index.

Other ranked Aisingapore models

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

Qwen SEA LION v4.5 27B IT: common questions

How does Qwen SEA LION v4.5 27B IT rank among AI models?

Qwen SEA LION v4.5 27B IT holds ModelCap Index position #88 of 350 ranked language models as of 25 October 2026, with an Index score of 56.1 (interval 44.0–68.3); evidence: modeled · lineage. The Index combines public benchmark boards with published uncertainty; the methodology page explains the weighting.

How much does Qwen SEA LION v4.5 27B IT cost per 1M tokens?

No live API price is listed for Qwen SEA LION v4.5 27B IT in the current snapshot as of 25 October 2026 because the latest endpoint refresh was unavailable. ModelCap shows a price only when a provider currently lists one.

What is the context window of Qwen SEA LION v4.5 27B IT?

Qwen SEA LION v4.5 27B IT has a published context window of 262K tokens (262,144). Its catalogue-declared route output cap is unknown. OpenRouter catalogue or provider-endpoint declaration. Limits can vary by provider and prompt length; a model-wide maximum has not been independently verified. The providers table lists each endpoint's context limit.

Is Qwen SEA LION v4.5 27B IT open-weight?

Open weights (mit). 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 aisingapore/Qwen-SEA-LION-v4.5-27B-IT on Hugging Face.

Which benchmarks has Qwen SEA LION v4.5 27B IT been evaluated on?

Qwen SEA LION v4.5 27B IT's Index position rests on the evidence listed on this page; it has no result on the public boards ModelCap tracks as separate leaderboards as of 25 October 2026. The evidence panel names each source and its publication date.

When was Qwen SEA LION v4.5 27B IT released?

Qwen SEA LION v4.5 27B IT first appeared in the catalogue on 14 May 2026. It is the current version in its family. Rank and price movements since then are recorded on the site's changes feed.