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ModelCap

Seed 2.1 Turbo

Current board #134NewAPI only7d #119 → #134

ByteDance Seed·bytedance-seed/seed-2-1-turbo

Seed 2.1 Turbo is ModelCap current-board rank #134 with Index 20.1 (Modeled · prior), from the ModelCap Index as of 14 Aug 2026, 00:58 UTC.

Seed 2.1 Turbo listed OpenRouter input price is $0.50 per 1M tokens and listed output price is $2.50 per 1M tokens, from OpenRouter listed prices as of 14 Aug 2026, 00:58 UTC.

Seed 2.1 Turbo has a published context limit of 262K tokens in the ModelCap catalogue as of 14 Aug 2026, 00:58 UTC.

Seed 2.1 Turbo has 1 published OpenRouter serving endpoint, from OpenRouter as of 14 Aug 2026, 00:58 UTC.

Seed 2.1 Turbo weight access is api only, from ModelCap classification of published repository metadata as of 14 Aug 2026, 00:58 UTC.

Snapshot facts · download the public dataset · methodology

ModelCap Index · Current board
20.1#134
Estimated · 4% support · score interval 20.1–75.0
No admitted evaluation publication timestamp yet
Market Gravity
23.9Increased by 0.1
Secondary market signal
Input
$0.50
per 1M tokens
Output
$2.50
per 1M tokens
Context
262K
tokens
Providers
1
endpoint
Gateway spend
—
latest · Vercel share

Providers

Uptime measured over the last 30 minutes
ProviderInputOutputContextQuantUptime
Seedfp8$0.50$2.50262Kfp8—

ModelCap Index · Current board

Methodology
20.1
Modeled · prior · calibrated architecture-and-release-era fallback from static public metadata
Current board
#134
Public rank basis
Modeled · prior (architecture)
Index support
3.9% · weak
Index interval
20.1–75.0
Rank posterior
Not available
Top 5 / Top 10 probability
Not available / Not available
Posterior as of
Snapshot timestamp unavailable
Evidence as of
No admitted evaluation publication timestamp
Identity binding
Exact catalogue product · bytedance-seed/bytedance-seed/seed-2-1-turbo · aggregates disclosed benchmark configurations · endpoint configuration not claimed
Index observations used
0
Qualified Index evidence point
47.5
Architecture fallback
estimated · 0% coverage · 0 anchors
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)
4.9
Liquidity (providers × uptime)
35.1
Open reach (HF downloads)
—
Surface (context / tools / modalities)
90.3
Freshness
99.5
  • · OpenRouter popularity #231
  • · 1 live provider
  • · Catalogue: context 262144, reasoning, tools, modalities Text/Image/Video
  • · First seen 2026-08-12

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
Estimator abstained

insufficient-artifact-metadata

Feature coverage
86%
Training support
222 models · 143 lineages

insufficient-artifact-metadata. This layer predicts from admitted evidence and safe metadata only. It never enters ModelCap Score or rank.

Deployment readiness

Metadata index
30.1
limited · 38% metadata coverage
Not capability
Artifact reproducibility
0.0
Access & legal clarity
30.3
Deployability
80.0
Evaluation provenance
0.0

Missing: artifactReproducibility.revision-sha, artifactReproducibility.architecture-and-model-type, artifactReproducibility.parameter-count, artifactReproducibility.serialized-weight-format, artifactReproducibility.base-lineage, accessLegalClarity.declared-license, accessLegalClarity.resolvable-license-terms, evaluationProvenance.admitted-evaluation-observations, evaluationProvenance.capability-family-breadth, evaluationProvenance.evaluation-source-diversity, evaluationProvenance.identity-and-source-confidence, evaluationProvenance.evaluation-dataset-revisions.

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

Market activity

Venue coverage
Market Gravity
23.9
OpenRouter weekly popularity
#231 of 306

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%
4.9

OpenRouter weekly popularity across the full model catalogue.

Liquidity25%
35.1

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

Open reach15%
50.0

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

Freshness5%
99.5

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

Specification

Context window
262K tokens
Max output
262K tokens
Inputs
Text, Image, Video
Outputs
Text
Tokenizer
Other
Cached input tokens
Not offered
First seen on OpenRouter
12 Aug 2026

Capabilities

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