OpenAI·openai/gpt-5-nano
GPT-5 Nano is a language model published by OpenAI. 4 OpenRouter endpoints are published in the latest snapshot. It accepts text, image, file input and returns text. The published context limit is 400K tokens. The catalogue declares support for reasoning, tool use, structured outputs.
Superseded by GPT-5.4 Nano. It no longer holds a current-board position; its all-versions archive rank is #123.
Providers
Uptime measured over the last 30 minutesReasoning efforts
Best supported result can inform ModelCapPublished Max, X-High, High and other configurations for this model. These are sourced scores, not head-to-head essays.
Related community configurations
Human preference ratingOther versions (2)
ModelCap Index · All-versions archive
Methodology- Public rank basis
- Measured (measured)
- Index support
- 75.1% · strong
- Index interval
- 46.1–54.1
- Rank posterior
- Not available
- Top 5 / Top 10 probability
- Not available / Not available
- Posterior as of
- Snapshot timestamp unavailable
- Identity binding
- Exact catalogue product · openai/openai/gpt-5-nano · aggregates disclosed benchmark configurations · endpoint configuration not claimed
- Direct benchmark observations
- 3
- Breadth-adjusted BES point estimate
- 50.1
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
- 50.1
- Evidence status
- confirmed · 90% mass
- General preference
- 51.1
- Coding
- 51.4
- Agents & tools
- —
- Reasoning
- 26.4
- Evidence breadth
- 95%
- Evidence coverage
- 75%
- Usage (OpenRouter popularity)
- 23.5
- Liquidity (providers × uptime)
- 75.9
- Open reach (HF downloads)
- —
- Surface (context / tools / modalities)
- 93.3
- Freshness
- 24.9
- · OpenRouter popularity #78
- · 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.
- Arena Overall · High51.1
- Arena Coding · High51.4
- ARC-AGI-2 Verified · High26.4
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- Artifact reproducibility
- 0.0
- Access & legal clarity
- 30.3
- Deployability
- 89.8
- Evaluation provenance
- 73.6
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
- 40.6
- OpenRouter weekly popularity
- #78 of 298
- Vercel token share · 7d
- 8.25%
- Vercel request share · 7d
- 25.30%
- Venue data through
- 2026-08-07
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
Arena has published current community results for High. No default-configuration result is published, so the raw Arena field stays configuration-specific. The strongest supported result can still inform ModelCap Score with reduced confidence.
Current board through 6 Aug 2026, 13:00 UTC
Market Gravity breakdown
- Usage55%
- 23.5
- Liquidity25%
- 75.9
- Open reach15%
- 50.0
- Freshness5%
- 24.9
OpenRouter weekly popularity across the full model catalogue.
Independent providers versus the model's open or closed cohort, weighted by uptime.
Hugging Face 30-day downloads for open models; neutral for closed models.
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
- $0.0050 / 1M
- First seen on OpenRouter
- 7 Aug 2025
- Knowledge cutoff
- 2024-05-31
Capabilities
- Supported: Reasoning
- Supported: Tool use
- Supported: Structured output
- Supported: Response format
- Supported: Moderated