GPT-5 Nano model profile
Evidence snapshot:
GPT-5 Nano is a OpenAI model profile with a 400,000-token context window. The dated catalog snapshot records text, image, file modalities and interfaces for file input, prompt caching, reasoning controls, structured output, text generation.
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.
GPT-5 Nano is a reference profile: OpenAI publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call.
GPT-5 Nano is an independent knowledge profile. It does not claim that Kendr hosts the model, quote a Kendr customer price, promise API availability, or advertise a Kendr routing receipt.
GPT-5 Nano accepts text, image, and file and returns text. The snapshot records file input, prompt caching, reasoning controls, structured output, text generation, tool calling, vision, and web search pricing as capabilities or interfaces.
The dated reference snapshot lists $0.025 input and $0.2 output per million tokens. Cached input is $0.0025 per million tokens.
The 2026-09-06 snapshot includes 6 Design Arena categories and AutoExacto results for 4 provider observations. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable.
GPT-5 Nano ranked #59 in the cited trailing-7-day third-party catalog usage dataset as of 2026-09-06. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share.
Profile data was reviewed for the 2026-09-06 snapshot. Claims retain their source dates, and unavailable fields are shown as unavailable instead of estimated.
Profile facts
- Profile type
- Model research profile
- Provider or publisher
- OpenAI
- Context window
- 400,000 tokens
- Snapshot date
- 2026-09-06
- Knowledge cutoff
- 2024-05-31
- Reference catalog ID
- openai/gpt-5-nano
When to pick GPT-5 Nano
GPT-5 Nano is a reference profile: OpenAI publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call.
Each condition below is derived from this model's own values in the 2026-09-06 snapshot, compared only against models publishing the same field.
- Reach for it when cost is the binding constraint. At $0.025 in and $0.2 out per 1M tokens, combined token price sits in the cheapest quarter of the 146 models publishing both rates in this snapshot.
- Reach for it when the input includes images. The snapshot records image input, so screenshots, scans, and diagrams can be sent directly instead of described.
- Reach for it when the model has to call tools. Tool calling is recorded in the snapshot, so this route can drive an agent loop rather than only answer in prose.
- Look elsewhere when you need to call it through Kendr today. This is a research reference profile with no Kendr alias. The facts and evidence here are published for comparison; the model is not routable on Kendr.
- Look elsewhere when the request is trivial and latency-sensitive. Reasoning is mandatory on this route and cannot be turned off, so short factual requests still pay reasoning tokens and reasoning latency.
Context, modalities, and identity
GPT-5 Nano accepts text, image, and file and returns text. The snapshot records file input, prompt caching, reasoning controls, structured output, text generation, tool calling, vision, and web search pricing as capabilities or interfaces.
- Provider or publisher
- OpenAI
- Context window
- 400,000 tokens
- Maximum output
- 128,000 tokens
- Input modalities
- text, image, and file
- Output modalities
- text
- Knowledge cutoff
- 2024-05-31
Model overview
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.
- Reference model ID
- openai/gpt-5-nano
- Canonical version
- openai/gpt-5-nano-2025-08-07
- Hugging Face ID
- Not separately documented
Capabilities and supported controls
Capabilities and parameters are reported from the dated catalog and source records; their presence does not guarantee identical behavior across every provider route.
- Supported parameters
- include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools
- file input
- prompt caching
- reasoning controls
- structured output
- text generation
- tool calling
- vision
- web search pricing
Dated pricing snapshot
The dated reference snapshot lists $0.025 input and $0.2 output per million tokens. Cached input is $0.0025 per million tokens.
These are dated third-party reference prices, not Kendr prices or an availability offer. Routes, tiers, caching, region, and provider policy can change the landed price.
- Price date
- 2026-09-06
- Input
- $0.025 per 1M tokens
- Cached input
- $0.0025 per 1M tokens
- Output
- $0.2 per 1M tokens
Provider routes, performance, and uptime
The snapshot retains 4 provider endpoints. Provider prices, context limits, p50 performance, and uptime can differ by route and are not Kendr guarantees.
- Active provider endpoints
- 4
- Best p50 latency
- 1.17 s
- Best p50 throughput
- 116 tok/s
- Availability with routing
- 99.98% over the sampled window
- Availability without routing
- 92.80% over the sampled window
- Performance date
- 2026-09-06
| Provider | Quantization | Input / 1M | Output / 1M | Cache read / 1M | Context | p50 latency | p50 throughput | Uptime (1d) |
|---|---|---|---|---|---|---|---|---|
| OpenAI Flex | unknown | $0.025 / 1M | $0.2 / 1M | $0.0025 / 1M | 400,000 tokens | 1.17 s | 104 tok/s | 100.00% |
| Azure | unknown | $0.05 / 1M | $0.4 / 1M | $0.01 / 1M | 400,000 tokens | 2.17 s | 72 tok/s | 99.99% |
| OpenAI | unknown | $0.05 / 1M | $0.4 / 1M | $0.005 / 1M | 400,000 tokens | 2.35 s | 116 tok/s | 97.72% |
| Azure (EU) | unknown | $0.055 / 1M | $0.44 / 1M | $0.011 / 1M | 400,000 tokens | 2.62 s | 87 tok/s | 100.00% |
Benchmark evidence and limitations
The 2026-09-06 snapshot includes 6 Design Arena categories and AutoExacto results for 4 provider observations. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable.
Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source.
- AutoExacto coverage
- 4 provider observations over 32 days
| Design Arena category | Elo | Win rate | Rank |
|---|---|---|---|
| 3d | 1003 | 36.3% | #104 |
| codecategories | 1101 | 48% | #92 |
| dataviz | 1075 | 46.2% | #94 |
| gamedev | 1074 | 46.5% | #94 |
| uicomponent | 1088 | 51.9% | #89 |
| website | 1114 | 48.9% | #92 |
AutoExacto provider benchmarks
Rolling provider observations from the cited third-party benchmark view. The lookback is 32 days; GPQA Diamond and TAU-Bench Airline measure different abilities and should not be blended into one score.
| Provider | GPQA Diamond | TAU-Bench Airline | Runs |
|---|---|---|---|
| auto-routing | 70.88% | 52% | 1 |
| Azure | 69.02% | 42% | 1 |
| Azure (EU) | 68.69% | 44% | 1 |
| OpenAI | 67.85% | 42.67% | 1 |
Popularity and market context
GPT-5 Nano ranked #59 in the cited trailing-7-day third-party catalog usage dataset as of 2026-09-06. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share.
- Third-party catalog rank
- #59
- Global market share
- Not inferred
- Observation date
- 2026-09-06
Frequently asked questions
When should I use GPT-5 Nano?
GPT-5 Nano is a reference profile: OpenAI publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call. Reach for it when cost is the binding constraint: At $0.025 in and $0.2 out per 1M tokens, combined token price sits in the cheapest quarter of the 146 models publishing both rates in this snapshot. Reach for it when the input includes images: The snapshot records image input, so screenshots, scans, and diagrams can be sent directly instead of described. Reach for it when the model has to call tools: Tool calling is recorded in the snapshot, so this route can drive an agent loop rather than only answer in prose. Look elsewhere when you need to call it through Kendr today: This is a research reference profile with no Kendr alias. The facts and evidence here are published for comparison; the model is not routable on Kendr. Look elsewhere when the request is trivial and latency-sensitive: Reasoning is mandatory on this route and cannot be turned off, so short factual requests still pay reasoning tokens and reasoning latency.
What is GPT-5 Nano?
GPT-5 Nano is a OpenAI model profile with a 400,000-token context window. The dated catalog snapshot records text, image, file modalities and interfaces for file input, prompt caching, reasoning controls, structured output, text generation.
What context window does GPT-5 Nano have?
The dated profile lists 400,000 tokens of context and up to 128,000 output tokens. Provider routes, variants, and runtime configuration can impose lower effective limits.
What benchmark evidence is available for GPT-5 Nano?
The 2026-09-06 snapshot includes 6 Design Arena categories and AutoExacto results for 4 provider observations. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable. Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source.
Is GPT-5 Nano available through Kendr?
This is an independent knowledge profile, not a Kendr-hosted availability claim. Check Kendr's live public model API for currently enabled Kendr aliases.
Does the popularity rank represent GPT-5 Nano's global market share?
GPT-5 Nano ranked #59 in the cited trailing-7-day third-party catalog usage dataset as of 2026-09-06. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share. No global market-share percentage is inferred when the source does not publish one.
Sources and evidence dates
- GPT-5 Nano third-party catalog record (catalog, checked 2026-09-06)
- Third-party model catalog methodology (methodology, checked 2026-09-06)
- OpenAI official model documentation (primary, checked 2026-09-06)
- Design Arena leaderboard and methodology (benchmark, checked 2026-09-06)
- GPT-5 Nano third-party catalog record (benchmark, checked 2026-09-06)