Aperture

Chat with open models · billed per token · pay only for what you use

Explore the model catalog

Open models, one meter

live catalog · prices per 1M tokens · the meter shows every token

gpt-oss 20BOpenAI OSS

OpenAI's open-weight 20B — quick and capable.

$0.05/M in$0.20/M out128k ctx
Gemma 4 31BGemma

Google's open Gemma 4 instruct, 31B.

$0.05/M in$0.15/M out256k ctx
Nemotron 3 Super 120BNemotron

NVIDIA's large open reasoning model.

$0.30/M in$0.60/M out256k ctx
Nemotron 3 Ultra 550BNemotron

NVIDIA's flagship — 1M context, slower.

$0.50/M in$1.50/M out1M ctx
North Mini CodeCohere

Cohere's coding-focused open model.

$0.10/M in$0.30/M out256k ctx
Nemotron Nano 9BNemotron

Small and fast Nemotron Nano.

$0.02/M in$0.08/M out128k ctx

Start with $0.20 of free credit

Aperture · pay per token · openai-compatible API