Gemini 1.5 Pro vs Phi 4 Reasoning Plus
Phi 4 Reasoning Plus significantly outperforms across most benchmarks.
Google · Microsoft · Updated for 2026
Which is better?
Gemini 1.5 Pro outperforms in 0 benchmarks, while Phi 4 Reasoning Plus is better at 2 benchmarks (GPQA, MMLU-Pro). Phi 4 Reasoning Plus significantly outperforms across most benchmarks.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Gemini 1.5 Pro
- you want predictable pricing at $2.50/M input and $10.00/M output
Choose Phi 4 Reasoning Plus
- you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
- you want the most recent training data — it shipped Apr 2025
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 1.5 Pro outperforms in 0 benchmarks, while Phi 4 Reasoning Plus is better at 2 benchmarks (GPQA, MMLU-Pro).
Phi 4 Reasoning Plus significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Context Window
Maximum input and output token capacity
Only Gemini 1.5 Pro specifies input context (2,097,152 tokens). Only Gemini 1.5 Pro specifies output context (8,192 tokens).
Input Capabilities
Supported data types and modalities
Gemini 1.5 Pro supports multimodal inputs, whereas Phi 4 Reasoning Plus does not.
Gemini 1.5 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.
Gemini 1.5 Pro
Phi 4 Reasoning Plus
License
Usage and distribution terms
Gemini 1.5 Pro is licensed under a proprietary license, while Phi 4 Reasoning Plus uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
Gemini 1.5 Pro was released on 2024-05-01, while Phi 4 Reasoning Plus was released on 2025-04-30.
Phi 4 Reasoning Plus is 12 months newer than Gemini 1.5 Pro.
May 1, 2024
2.3 years ago
Apr 30, 2025
1.3 years ago
12mo newerKnowledge Cutoff
When training data ends
Gemini 1.5 Pro has a knowledge cutoff of 2023-11-01, while Phi 4 Reasoning Plus has a cutoff of 2025-03-01.
Phi 4 Reasoning Plus has more recent training data (up to 2025-03-01), making it potentially better informed about events through that date compared to Gemini 1.5 Pro (2023-11-01).
Nov 2023
Mar 2025
1.3 yr newerOutputs Comparison
Judge for yourself.
Run your own prompts against Gemini 1.5 Pro and Phi 4 Reasoning Plus side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 1.5 Pro vs Phi 4 Reasoning Plus.