Models/OpenAI/GPT-5 Nano

GPT-5 Nano

Name: GPT-5 Nano API access
Brand: OpenAI

OpenAI · Proprietary · Released Aug 7, 2025 · openai/gpt-5-nano

Best $0.05 in / $0.40 out via OpenAI

Compare Estimate cost

400K contextVisionToolsReasoningStructured outputPrompt caching

Available from 6 providersUSD / MTOK · PRICES 23 MINUTES AGO · SPEED 7 MINUTES AGO

EST. MONTHLY COSTclick a row for detail · click headers to sort

PROVIDER	INPUT	OUTPUT	CACHE	CONTEXT	QUANT	TTFT	TPS	UPTIME
OpenAIopenai/flexFLEX1ST PARTY	$0.025	$0.20	$0.003	400K	—	2s°	119° tok/s	100.0%
CheaperInferenceStandardDIRECTMARKETPLACE	$0.04	$0.34	—	—	—	12.8sᴿ	835ᴿ tok/s	—
CheaperInferenceZero data retentionDIRECTMARKETPLACE	$0.04	$0.36	—	—	—	8.7sᴿ	728ᴿ tok/s	—
OpenAIopenai1ST PARTY	$0.05	$0.40	$0.005	400K	—	—	—	100.0%
Azureazure	$0.05	$0.40	$0.01	400K	—	✕	✕	100.0%
Azureazure/swedencentral	$0.055	$0.44	$0.011	400K	—	—	—	100.0%

TTFT/TPS: median (P50) over trailing 504h · chat10k profile (~10K in / 200 out) · measured against the provider API directly; ° = routed via OpenRouter (adds a hop) · ✕ = probed, endpoint returned no measurable stream · ᴿ = reasoning model measured on the reasoning10k profile (4K-token output budget; first token includes thinking time) · methodology v1.1 · measured 7 minutes ago

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Pricing variants · USD / MTok in / out

STANDARD

$0.05 / $0.40

per MTok in / out

BATCH

$0.025 / $0.20

async batch

CACHE READ $0.005WEB SEARCH $0.01 / search

Recent changesRSS ↗

Sep 23, 2026endpoint added · cheaperinference4 → 6

About

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...

Specifications

Context window400,000

Max output128,000

Modalities intext, image, file

Modalities outtext

LicenseProprietary

ReleasedAug 7, 2025

Knowledge cutoff2024-05-31

TokenizerGPT

GPT-6.1 Sol Pro$2.00 / $10.00 GPT-6.1 Sol$2.00 / $10.00 GPT-6 Luna Pro$0.10 / $0.50 GPT-6 Luna$0.10 / $0.50

Embed badge

[![GPT-5 Nano](https://modelindex.ai/badge/openai/gpt-5-nano)](https://modelindex.ai/models/openai/gpt-5-nano)

Sources

OpenRouter API23 minutes ago

AGGREGATOR

LiteLLM dataset23 minutes ago

AGGREGATOR

ModelIndex benchmarks6 days ago

MEASURED

Verified 23 minutes ago · list prices, not negotiated rates.