Models5 categories compared

Gemma vs Phi: The Best Small Models for Low RAM

Google Gemma 2 and Microsoft Phi-4 target the same sweet spot: maximum quality from minimum RAM. Gemma 2 9B is one of the best sub-10B models available, while Phi-4 Mini 3.8B punches far above its weight. If you have a MacBook Air or an iPhone, these are your top contenders.

Verdict

Tie

Phi-4 Mini 3.8B delivers the best quality-per-gigabyte of any model and is the clear pick for 8 GB devices. Gemma 2 9B is the better model overall at the cost of needing 16 GB RAM. For 8 GB MacBook Air, go Phi. For 16 GB MacBook Air, go Gemma 2 9B.

Gemma 2

wins

Ties

draws

Phi-4

wins

Category-by-Category Breakdown

Category	Gemma 2	Phi-4	Winner
Quality at Minimum RAM	Gemma 2B on 8 GB: decent	Phi-4 Mini 3.8B on 8 GB: strong	Phi-4
Best Overall Quality	Gemma 2 9B is top-tier sub-10B	Phi-4 14B is good but needs 22 GB	Gemma 2
Safety & Alignment	Strong safety tuning from Google	Moderate safety tuning	Gemma 2
Reasoning (Small Size)	Good for its size	Matches 7B models on math and reasoning	Phi-4
Ecosystem & Support	Well supported in Ollama and MLX	Good Ollama support, growing community	Gemma 2

Detailed Analysis

Quality at Minimum RAM

Phi-4

Phi-4 Mini squeezes remarkable quality from just 7 GB RAM. At this memory budget, nothing else comes close.

Gemma 2

Gemma 2B on 8 GB: decent

Phi-4

Phi-4 Mini 3.8B on 8 GB: strong

Best Overall Quality

Gemma 2

Gemma 2 9B at 16 GB RAM delivers better overall quality than Phi-4 14B at 22 GB. Gemma is more efficient at the 9-10B scale.

Gemma 2

Gemma 2 9B is top-tier sub-10B

Phi-4

Phi-4 14B is good but needs 22 GB

Safety & Alignment

Gemma 2

Gemma has more conservative safety filters, which is better for public-facing applications but can be restrictive for some use cases.

Gemma 2

Strong safety tuning from Google

Phi-4

Moderate safety tuning

Reasoning (Small Size)

Phi-4

Phi-4 Mini 3.8B was specifically optimized for reasoning tasks and matches some 7B models on benchmarks like GSM8K.

Gemma 2

Good for its size

Phi-4

Matches 7B models on math and reasoning

Ecosystem & Support

Gemma 2

Gemma has slightly broader tooling support and more community fine-tunes available.

Gemma 2

Well supported in Ollama and MLX

Phi-4

Good Ollama support, growing community

Frequently Asked Questions

Which is better for a MacBook Air with 8 GB RAM?+

Phi-4 Mini 3.8B. It needs only 7 GB RAM and delivers quality that matches many 7B models. Gemma 2B is the alternative but noticeably weaker.

Is Gemma 2 9B better than Phi-4 Mini?+

Yes, but it needs twice the RAM. Gemma 2 9B is a better model overall but requires 16 GB. If you have the memory, Gemma 2 9B is the stronger choice.

Can these models run on an iPhone?+

Phi-4 Mini can run on iPhones with 8 GB+ RAM. Gemma 1B also runs on iPhones but is less capable. For mobile AI, Phi-4 Mini is the better option if your device supports it.