Mycelis
Mycelis
OpenAI
GPT-5.4 nano is a commercial model from OpenAI. Focus areas: Chat, Fast. Context window: 400,000 tokens.
Context window
400k
Reasoning level
7 / 10
MMLU
80.5
HumanEval
75.0
Pricing
$0.20 per 1M input tokens
Usable the moment you add a key — your own (BYOK) or one managed by Mycelis. No GPU deployment or infrastructure needed.