FastRouterGPT-5 Nano model ID, context window & pricing
gpt-nano
Quick facts
Model ID openai/gpt-5-nano
Source FastRouter
Context Window 400000
Pricing $0.05 input / $0.40 output per 1M tokens
Capabilities tool calling, reasoning, temperature control
Model overview
GPT-5 Nano is an AI model from FastRouter with 400000 token context window and text, image input support.
Published pricing is $0.05 input and $0.40 output per 1M tokens.
- Workloads that use text, image inputs with text outputs.
- Agent and tool workflows that need function calling.
- Reasoning-heavy prompts where stepwise problem solving matters.
Model ID openai/gpt-5-nano
Provider FastRouter
Family gpt-nano
Status -
Knowledge Cutoff 2024-10-01
Release Date 2025-08-07
Input Modalities text, image
Output Modalities text
Context Window 400000
Input Limit -
Output Limit 128000
Tool Calling Yes
Reasoning Yes
Structured Output -
Temperature Control Yes
Open Weights No
Input Cost / 1M tokens $0.05
Output Cost / 1M tokens $0.40
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.01
Cache Write Cost / 1M tokens -