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ModelCap

GPT-5.2 Chat

Arena #27API only

OpenAI·openai/gpt-5.2-chat

GPT-5.2 Chat has a published context limit of 128K tokens in the ModelCap catalogue as of 22 Sept 2026, 02:49 UTC.

GPT-5.2 Chat weight access is api only, from ModelCap classification of published repository metadata as of 22 Sept 2026, 02:49 UTC.

Snapshot facts · download the public dataset · methodology

ModelCap Index · Current board
81.5
Measured · 62% support · score interval 76.5–86.5
Evidence as of 13 Sept 2026, 00:00 UTC
Market Gravity
9.3
Secondary market signal
Input
Unlisted
no listed API price
Output
Unlisted
no listed API price
Context
128K
tokens
Providers
0
endpoints
Gateway spend
latest · Vercel share

Providers

Uptime measured over the last 30 minutes

No provider is currently serving this model.

ModelCap Index · Current board

Methodology
81.5
Measured · 2 public benchmark observations across 2 boards
Public rank basis
Measured (measured)
Index support
62.1% · strong
Index interval
76.5–86.5
Rank posterior
Not available
Top 5 / Top 10 probability
Not available / Not available
Posterior as of
Snapshot timestamp unavailable
Evidence as of
13 Sept 2026, 00:00 UTC
Identity binding
Exact catalogue product · openai/openai/gpt-5.2-chat · aggregates disclosed benchmark configurations · endpoint configuration not claimed
Index observations used
2
Qualified Index evidence point
81.5
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
81.5
Evidence status
confirmed · 77% mass
General preference
81.9
Coding
78.6
Agents & tools
Reasoning
Evidence breadth
92%
Evidence coverage
62%
Market and catalogue signals · secondary, never the language Index rank
Usage (OpenRouter popularity)
0.2
Liquidity (providers × uptime)
Open reach (HF downloads)
Surface (context / tools / modalities)
60.0
Freshness
33.7
  • · OpenRouter popularity #319
  • · Catalogue: context 128000, tools, modalities File/Image/Text
  • · First seen 2025-12-10

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

BES evidence selected · measured input only

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.

Deployment readiness

Metadata index
27.2
limited · 37% metadata coverage
Not capability
Artifact reproducibility
0.0
Access & legal clarity
30.3
Deployability
35.0
Evaluation provenance
53.4

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, deployability.independent-provider-records, deployability.measured-provider-uptime, deployability.published-provider-pricing, 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
9.3
OpenRouter weekly popularity
#319 of 322

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

Status
Ranked
Source
LMArena
Official rank
#27 of 402
Rating
1476.3
95% confidence interval
1472–1480
Votes
34K
Source published at
13 Sept 2026, 00:00 UTC
Category
overall
Identity match confidence
98%

Market Gravity breakdown

Usage55%
0.2

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%
50.0

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

Freshness5%
33.7

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

Specification

Context window
128K tokens
Max output
32K tokens
Inputs
File, Image, Text
Outputs
Text
Tokenizer
GPT
Cached input tokens
$0.175 / 1M
First seen on OpenRouter
10 Dec 2025

Capabilities

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

Benchmark leaderboards featuring GPT-5.2 Chat

All leaderboards
Public benchmark boards on which GPT-5.2 Chat has a published result
LeaderboardScoreSource rankConfigurationPublished
Arena coding leaderboardArena (LMArena)15151508–1522#37 of 397Default13 Sept 2026

GPT-5.2 Chat: common questions

How does GPT-5.2 Chat rank among AI models?

GPT-5.2 Chat has no public ModelCap Index position as of 22 September 2026: the snapshot lacks enough matched benchmark evidence, or the identity match is unresolved. Its catalogue facts (price, context, providers) are shown without a rank.

How much does GPT-5.2 Chat cost per 1M tokens?

No live API price is listed for GPT-5.2 Chat in the current snapshot as of 22 September 2026 because no serving endpoint is published. ModelCap shows a price only when a provider currently lists one.

What is the context window of GPT-5.2 Chat?

GPT-5.2 Chat has a published context window of 128K tokens (128,000) and a maximum output of 32K tokens. Individual providers can serve less than the published maximum; the providers table lists each endpoint's own limit.

Is GPT-5.2 Chat open-weight?

API only. No downloadable model weights are linked in the current source data; access is through a hosted API or product.

Which benchmarks has GPT-5.2 Chat been evaluated on?

GPT-5.2 Chat has published results on 1 public board tracked by ModelCap as of 22 September 2026: Arena coding 1515 (#37 of 397). Each board page ranks every tracked model on that benchmark; the ModelCap Index combines them with published uncertainty.

When was GPT-5.2 Chat released?

GPT-5.2 Chat first appeared in the catalogue on 10 Dec 2025. It is the current version in its family. Rank and price movements since then are recorded on the site's changes feed.