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Gemini 3.8 Flash vs Phi 4 Reasoning Plus

Gemini 3.8 Flash leads the LLM Stats Score 51.3 to 15.3.

Google · Microsoft · Updated for 2026

Which is better?

Gemini 3.8 Flash leads the overall LLM Stats Score 51.3 to 15.3, ranking #14 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 3.8 Flash

  • overall performance matters — it scores 51.3 and ranks #14 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Phi 4 Reasoning Plus

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Gemini 3.8 Flash
Google
Phi 4 Reasoning Plus
Microsoft
Core performance indexes
LLM Stats Score
51.3
#14
15.3
#218
Reasoning
47.2
#23
15.6
#212
Coding
39.9
#12
5.8
#187
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.75 / M
— / M
Output price
$3.75 / M
— / M
Context window
1,048,576
—

Individual benchmarks

13 reported for Gemini 3.8 Flash · 11 for Phi 4 Reasoning Plus

No common benchmarks found

Gemini 3.8 Flash and Phi 4 Reasoning Plusdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Gemini 3.8 Flash specifies input context (1,048,576 tokens). Only Gemini 3.8 Flash specifies output context (65,536 tokens).

Google
Gemini 3.8 Flash
Input1,048,576 tokens
Output65,536 tokens
Microsoft
Phi 4 Reasoning Plus
Input- tokens
Output- tokens
Thu Sep 03 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Gemini 3.8 Flash supports multimodal inputs, whereas Phi 4 Reasoning Plus does not.

Gemini 3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3.8 Flash

Text
Images
Audio
Video

Phi 4 Reasoning Plus

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 3.8 Flash 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.

Gemini 3.8 Flash

Proprietary

Closed source

Phi 4 Reasoning Plus

MIT

Open weights

Release Timeline

When each model was launched

Gemini 3.8 Flash was released on 2026-09-02, while Phi 4 Reasoning Plus was released on 2025-04-30.

Gemini 3.8 Flash is 16 months newer than Phi 4 Reasoning Plus.

Gemini 3.8 Flash

Sep 2, 2026

0 days ago

1.3yr newer
Phi 4 Reasoning Plus

Apr 30, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Gemini 3.8 Flash has a knowledge cutoff of 2026-03-31, while Phi 4 Reasoning Plus has a cutoff of 2025-03-01.

Gemini 3.8 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to Phi 4 Reasoning Plus (2025-03-01).

Gemini 3.8 Flash

Mar 2026

1 yr newer
Phi 4 Reasoning Plus

Mar 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3.8 Flash and Phi 4 Reasoning Plus side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash
✓ Preferred
Phi 4 Reasoning Plus
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash vs Phi 4 Reasoning Plus.

Which is better, Gemini 3.8 Flash or Phi 4 Reasoning Plus?

Gemini 3.8 Flash leads the LLM Stats Score 51.3 to 15.3. Gemini 3.8 Flash is made by Google and Phi 4 Reasoning Plus is made by Microsoft. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3.8 Flash compare to Phi 4 Reasoning Plus in benchmarks?

Gemini 3.8 Flash scores Terminal-Bench 2.1: 89.4%, LVBench: 87.1%, CharXiv-R: 86.2%, LABBench2: 86.2%, DeepSWE 1.1: 73.7%. Phi 4 Reasoning Plus scores FlenQA: 97.9%, HumanEval+: 92.3%, IFEval: 84.9%, OmniMath: 81.9%, AIME 2024: 81.3%.

What are the context window sizes for Gemini 3.8 Flash and Phi 4 Reasoning Plus?

Gemini 3.8 Flash supports 1.0M tokens and Phi 4 Reasoning Plus supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.8 Flash and Phi 4 Reasoning Plus?

Key differences include LLM Stats Score (51.3 vs 15.3), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash and Phi 4 Reasoning Plus?

Gemini 3.8 Flash is developed by Google and Phi 4 Reasoning Plus is developed by Microsoft.

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