Gemini 1.5 Flash 8B vs Phi-3.5-mini-instruct Comparison

Comparing Gemini 1.5 Flash 8B and Phi-3.5-mini-instruct across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemini 1.5 Flash 8B outperforms in 3 benchmarks (GPQA, MATH, MMLU-Pro), while Phi-3.5-mini-instruct is better at 0 benchmarks.

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks.

Thu Mar 19 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Phi-3.5-mini-instruct costs less

For input processing, Gemini 1.5 Flash 8B ($0.07/1M tokens) is 1.4x cheaper than Phi-3.5-mini-instruct ($0.10/1M tokens).

For output processing, Gemini 1.5 Flash 8B ($0.30/1M tokens) is 3.0x more expensive than Phi-3.5-mini-instruct ($0.10/1M tokens).

In conclusion, Gemini 1.5 Flash 8B is more expensive than Phi-3.5-mini-instruct.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Thu Mar 19 2026 • llm-stats.com

Gemini 1.5 Flash 8B

Input tokens$0.07

Output tokens$0.30

Best providerGoogle

Phi-3.5-mini-instruct

Input tokens$0.10

Output tokens$0.10

Best providerAzure

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Model Size

Parameter count comparison

4.2B diff

Gemini 1.5 Flash 8B has 4.2B more parameters than Phi-3.5-mini-instruct, making it 110.5% larger.

Gemini 1.5 Flash 8B

8.0Bparameters

Phi-3.5-mini-instruct

3.8Bparameters

8.0B

Gemini 1.5 Flash 8B

3.8B

Phi-3.5-mini-instruct

Context Window

Maximum input and output token capacity

Gemini 1.5 Flash 8B accepts 1,048,576 input tokens compared to Phi-3.5-mini-instruct's 128,000 tokens. Phi-3.5-mini-instruct can generate longer responses up to 128,000 tokens, while Gemini 1.5 Flash 8B is limited to 8,192 tokens.

Gemini 1.5 Flash 8B

Input1,048,576 tokens

Output8,192 tokens

Phi-3.5-mini-instruct

Input128,000 tokens

Output128,000 tokens

Thu Mar 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 1.5 Flash 8B supports multimodal inputs, whereas Phi-3.5-mini-instruct does not.

Gemini 1.5 Flash 8B can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 1.5 Flash 8B

Text

Images

Audio

Video

Phi-3.5-mini-instruct

Text

Images

Audio

Video

License

Usage and distribution terms

Gemini 1.5 Flash 8B is licensed under a proprietary license, while Phi-3.5-mini-instruct uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Gemini 1.5 Flash 8B

Proprietary

Closed source

Phi-3.5-mini-instruct

MIT

Open weights

Release Timeline

When each model was launched

Gemini 1.5 Flash 8B was released on 2024-03-15, while Phi-3.5-mini-instruct was released on 2024-08-23.

Phi-3.5-mini-instruct is 5 months newer than Gemini 1.5 Flash 8B.

Gemini 1.5 Flash 8B

Mar 15, 2024

2.0 years ago

Phi-3.5-mini-instruct

Aug 23, 2024

1.6 years ago

5mo newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash 8B has a documented knowledge cutoff of 2024-10-01, while Phi-3.5-mini-instruct's cutoff date is not specified.

We can confirm Gemini 1.5 Flash 8B's training data extends to 2024-10-01, but cannot make a direct comparison without Phi-3.5-mini-instruct's cutoff date.

Gemini 1.5 Flash 8B

Oct 2024

Phi-3.5-mini-instruct

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Provider Availability

Gemini 1.5 Flash 8B is available from Google. Phi-3.5-mini-instruct is available from Azure. The availability of providers can affect quality of the model and reliability.