Compare Aion 3.5 from Aion Labs and Phi 4 from Microsoft on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
Aion 3.5 and Phi 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Aion 3.5, from Aion Labs, has a 262,144-token context window and is priced at $3/M tokens input, $6/M tokens output on OpenRouter.
Phi 4, from Microsoft, has a 16,384-token context window and is priced at $0.07/M tokens input, $0.14/M tokens output on OpenRouter.
