OpenAI

GPT-5 Nano

400K ctxTextImage Tools

Released Aug 7, 2025 · 96B tokens this week · 2 providers

Overview

The smallest and cheapest member of the GPT-5 family, built for latency-sensitive glue work. Good at routing, tagging, short rewrites and pre-filtering before a larger model runs. Fast enough to sit in the request path of an interactive UI.

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Providers

Reference data — not yet measured from live traffic

PROVIDER		MAX OUT		OUTPUT /M				QUANT
OpenAICheapest	400K	128K	$0.050	$0.40	208ms	210	99.95%	Full
Azure AI Foundry	400K	128K	$0.055	$0.44	330ms	165	99.70%	Full

Latency p50 reflects a provider’s API endpoint responsiveness — the round-trip to its API, not per-token inference time. These figures, with throughput and uptime, are reference data until the gateway aggregates its own traffic.

Price comparison

Blended $ per 1M tokens

GPT-5 Nano$0.31

DeepSeek V3.2$0.37

Grok 4 Fast$0.42

Gemini 3 Flash$1.95

Claude Sonnet 4.5$12.00

Blended rate per 1M tokens, weighted one part prompt to three parts completion — roughly the shape of a chat workload. Your mix will move the number.

Call it

OpenAI-compatible — swap the base URL and go

curl https://model.cards/api/v1/chat/completions \
  -H "Authorization: Bearer $MODELCARDS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5-nano",
    "messages": [
      { "role": "user", "content": "Summarize the tradeoffs of speculative decoding." }
    ]
  }'