OpenAI

GPT-5 Nano

openai/gpt-5-nano

JSON

Specification

Published by the vendor; the platform bills at the target's declared price.

GPT-5 Nano

reasoning tools

OpenAI openai/gpt-5-nano

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...

Input $/1M: $0.05
Output $/1M: $0.40
Context: 400K
Max output: 128K
Released: Aug 7, 2025
Modalities: textimagefile

Cached input reads $0.005 per 1M

On this deployment

No routing target resolves to this model yet. Declare one and the router picks it up without retraining.

Not routable here yet

Add a target with metadata.model set to this id.

targets.yamlyaml

# targets.yaml - declare a target that runs GPT-5 Nano
targets:
  - id: gpt-5-nano
    kind: llm
    name: GPT-5 Nano
    metadata:
      model: openai/gpt-5-nano          # links the target to this catalogue entry
    capabilities:
      domains: [general]
      supports_tools: true
      context_window: 400000
    cost:
      usd_per_1k_tokens: 0.000225

Price among OpenAI models

Input list price per million tokens; GPT-5 Nano is the cheapest of 13 listed.

More from OpenAI

Other models by the same vendor in the catalogue.