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  1. Home
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  3. Compare

Aion 3.5 Mini vs Phi 4

Compare Aion 3.5 Mini 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.

Favicon for aion-labs
Aion 3.5 Mini
Favicon for microsoft
Phi 4
Favicon for aion-labs
Aion 3.5 Mini
Favicon for microsoft
Phi 4

Overview

Aion 3.5 Mini
Author
Aion Labs
Phi 4
Author
Microsoft
Aion 3.5 Mini
Context length
262Ktokens
Phi 4
Context length
16Ktokens
Aion 3.5 Mini
Reasoning
Phi 4
Reasoning
Aion 3.5 Mini
Input modalities
Phi 4
Input modalities
Aion 3.5 Mini
Output modalities
Phi 4
Output modalities

Aion 3.5 Mini vs Phi 4: side-by-side summary

Aion 3.5 Mini 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 Mini, from Aion Labs, has a 262,144-token context window and is priced at $0.70/M tokens input, $1.40/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.

Context window
  • Aion 3.5 Mini: 262,144 tokens
  • Phi 4: 16,384 tokens
Price
  • Aion 3.5 Mini: $0.70/M tokens input, $1.40/M tokens output
  • Phi 4: $0.07/M tokens input, $0.14/M tokens output
Provided by
  • Aion 3.5 Mini: Aion Labs
  • Phi 4: Microsoft
  • Aion 3.5 Mini model details, providers and pricing
  • Phi 4 model details, providers and pricing

Aion 3.5 Mini vs Phi 4 at a glance

Aion 3.5 Mini vs Phi 4 comparison
AttributeAion 3.5 MiniPhi 4
Input price$0.70/M tokens$0.07/M tokens
Output price$1.40/M tokens$0.14/M tokens
Context window262,144 tokens16,384 tokens
Intelligence IndexNot available5.9
Coding IndexNot availableNot available
Agentic IndexNot availableNot available
Latency (p50)1.88 s1.63 s
Throughput (p50)53.0 tok/s52.0 tok/s

Benchmark data updated Oct 5, 2026

Frequently asked questions

Is Aion 3.5 Mini cheaper than Phi 4?

Phi 4 is cheaper than Aion 3.5 Mini on OpenRouter: Phi 4 costs $0.07/M tokens input and $0.14/M tokens output, while Aion 3.5 Mini costs $0.70/M tokens input and $1.40/M tokens output.

Which has the longer context window, Aion 3.5 Mini or Phi 4?

Aion 3.5 Mini has the longer context window at 262,144 tokens, compared with 16,384 tokens for Phi 4.

Which is faster, Aion 3.5 Mini or Phi 4?

Aion 3.5 Mini is faster on OpenRouter, generating a median 53.0 tokens per second compared with 52.0 tokens per second for Phi 4.