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ModelCap

GPT-5

All-versions archive #87Arena #95API only

OpenAI·openai/gpt-5

GPT-5 is ModelCap archive rank #87 (Measured), from the ModelCap Index as of 22 Sept 2026, 02:49 UTC.

GPT-5 listed OpenRouter input price is $1.25 per 1M tokens and listed output price is $10.00 per 1M tokens, from OpenRouter listed prices as of 22 Sept 2026, 02:49 UTC.

GPT-5 has a published context limit of 400K tokens in the ModelCap catalogue as of 22 Sept 2026, 02:49 UTC.

GPT-5 has 3 published OpenRouter serving endpoints, from OpenRouter as of 22 Sept 2026, 02:49 UTC.

GPT-5 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 · All-versions archive
65.2#87
Measured · 65% support · score interval 60.4–70.0
Evidence as of 21 Sept 2026, 17:21 UTC
Market Gravity
40.9Decreased by 0.1
Secondary market signal

Superseded by GPT-5.5. It no longer holds a current-board position; its all-versions archive rank is #87.

Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Context
400K
tokens
Providers
3
endpoints
Gateway spend
latest · Vercel share

Providers

Uptime measured over the last 30 minutes
ProviderInputOutputContextQuantUptime
AzureCheapest$1.25$10.00400K100.0%
OpenAIdefault$1.25$10.00400K100.0%
Azureswedencentral$1.38$11.00400K

Reasoning efforts

Best supported result can inform ModelCap

Published Max, X-High, High and other configurations for this model. These are sourced scores, not head-to-head essays.

Related community configurations

Human preference rating
ConfigurationRatingSource rankVotesSource
High
gpt-5-high
1435
CI 1430–1439
#9531KLMArena
Match 100%

Other versions (6)

ModelCap Index · All-versions archive

Methodology
65.2
Measured · 3 public benchmark observations across 3 boards
All-versions archive
#87
Public rank basis
Measured (measured)
Index support
65.2% · strong
Index interval
60.4–70.0
Rank posterior
Not available
Top 5 / Top 10 probability
Not available / Not available
Posterior as of
Snapshot timestamp unavailable
Evidence as of
21 Sept 2026, 17:21 UTC
Identity binding
Exact catalogue product · openai/openai/gpt-5 · aggregates disclosed benchmark configurations · endpoint configuration not claimed
Index observations used
3
Qualified Index evidence point
65.2
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
65.2
Evidence status
confirmed · 87% mass
General preference
67.1
Coding
58.2
Agents & tools
Reasoning
32.9
Evidence breadth
95%
Evidence coverage
65%
Market and catalogue signals · secondary, never the language Index rank
Usage (OpenRouter popularity)
13.9
Liquidity (providers × uptime)
98.9
Open reach (HF downloads)
Surface (context / tools / modalities)
93.3
Freshness
21.0
  • · OpenRouter popularity #144
  • · 2 live providers
  • · Catalogue: context 400000, reasoning, tools, modalities Text/Image/File
  • · First seen 2025-08-07

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
48.3
partial · 56% metadata coverage
Not capability
Artifact reproducibility
0.0
Access & legal clarity
30.3
Deployability
90.0
Evaluation provenance
76.4

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, 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
40.9
OpenRouter weekly popularity
#144 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
#95 of 402
Rating
1434.7
95% confidence interval
1430–1439
Votes
31K
Source published at
13 Sept 2026, 00:00 UTC
Category
overall
Identity match confidence
100%

Market Gravity breakdown

Usage55%
13.9

OpenRouter weekly popularity across the full model catalogue.

Liquidity25%
98.9

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%
21.0

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

Specification

Context window
400K tokens
Max output
128K tokens
Inputs
Text, Image, File
Outputs
Text
Tokenizer
GPT
Cached input tokens
$0.125 / 1M
First seen on OpenRouter
7 Aug 2025
Knowledge cutoff
2024-09-30

Capabilities

  • Supported: Reasoning
  • Supported: Tool use
  • Supported: Structured output
  • Supported: Response format
  • Supported: Moderated

Benchmark leaderboards featuring GPT-5

All leaderboards
Public benchmark boards on which GPT-5 has a published result
LeaderboardScoreSource rankConfigurationPublished
Arena coding leaderboardArena (LMArena)14701462–1478#112 of 397High13 Sept 2026
ARC-AGI-2 leaderboardARC Prize Foundation9.9%#111 of 214High21 Sept 2026
τ²-Bench Telecom (Artificial Analysis run)Artificial Analysis84.8%#102 of 436tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5 (high)":reasoning=true5 Sept 2026
Humanity's Last Exam (Artificial Analysis run)Artificial Analysis28.5%#127 of 615hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5 (high)":reasoning=true5 Sept 2026

GPT-5: common questions

How does GPT-5 rank among AI models?

GPT-5 is a superseded version and is not on the current board as of 22 September 2026. Its archive position, where one exists, is shown on the page; the newer version carries the current rank.

How much does GPT-5 cost per 1M tokens?

GPT-5 is listed at $1.25 per 1M input tokens and $10.00 per 1M output tokens as of 22 September 2026 across 2 providers. Prices come from the OpenRouter catalogue and re-observe on every refresh. For 1,000 requests using 2,000 input and 500 output tokens each, the listed rates imply $7.50 total (2M input + 0.5M output). This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the chosen endpoint's rate and limits before budgeting.

What is the context window of GPT-5?

GPT-5 has a published context window of 400K tokens (400,000) and a maximum output of 128K tokens. Individual providers can serve less than the published maximum; the providers table lists each endpoint's own limit.

Is GPT-5 open-weight?

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

Which API providers serve GPT-5?

2 providers serve GPT-5 through OpenRouter as of 22 September 2026: Azure and OpenAI. Each provider's price, context limit, quantization and measured uptime are in the providers table above.

Which benchmarks has GPT-5 been evaluated on?

GPT-5 has published results on 4 public boards tracked by ModelCap as of 22 September 2026: Arena coding 1470 (#112 of 397), ARC-AGI-2 9.9% (#111 of 214), AA τ²-Bench Telecom 84.8% (#102 of 436) and AA Humanity's Last Exam 28.5% (#127 of 615). Each board page ranks every tracked model on that benchmark; the ModelCap Index combines them with published uncertainty.

When was GPT-5 released?

GPT-5 first appeared in the catalogue on 7 Aug 2025, with a published knowledge cutoff of 2024-09-30. It has since been superseded by GPT-5.5. Rank and price movements since then are recorded on the site's changes feed.