Model Comparison

DeepSeek-V2.5 vs Phi 4 Reasoning Plus

Phi 4 Reasoning Plus significantly outperforms across most benchmarks.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

DeepSeek-V2.5 outperforms in 0 benchmarks, while Phi 4 Reasoning Plus is better at 1 benchmark (Arena Hard).

Phi 4 Reasoning Plus significantly outperforms across most benchmarks.

Sun May 31 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

222.0B diff

DeepSeek-V2.5 has 222.0B more parameters than Phi 4 Reasoning Plus, making it 1585.7% larger.

DeepSeek
DeepSeek-V2.5
236.0Bparameters
Microsoft
Phi 4 Reasoning Plus
14.0Bparameters
236.0B
DeepSeek-V2.5
14.0B
Phi 4 Reasoning Plus

Context Window

Maximum input and output token capacity

Only DeepSeek-V2.5 specifies input context (8,192 tokens). Only DeepSeek-V2.5 specifies output context (8,192 tokens).

DeepSeek
DeepSeek-V2.5
Input8,192 tokens
Output8,192 tokens
Microsoft
Phi 4 Reasoning Plus
Input- tokens
Output- tokens
Sun May 31 2026 • llm-stats.com

License

Usage and distribution terms

DeepSeek-V2.5 is licensed under deepseek, while Phi 4 Reasoning Plus uses MIT.

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

DeepSeek-V2.5

deepseek

Open weights

Phi 4 Reasoning Plus

MIT

Open weights

Release Timeline

When each model was launched

DeepSeek-V2.5 was released on 2024-05-08, while Phi 4 Reasoning Plus was released on 2025-04-30.

Phi 4 Reasoning Plus is 12 months newer than DeepSeek-V2.5.

DeepSeek-V2.5

May 8, 2024

2.1 years ago

Phi 4 Reasoning Plus

Apr 30, 2025

1.1 years ago

11mo newer

Knowledge Cutoff

When training data ends

Phi 4 Reasoning Plus has a documented knowledge cutoff of 2025-03-01, while DeepSeek-V2.5's cutoff date is not specified.

We can confirm Phi 4 Reasoning Plus's training data extends to 2025-03-01, but cannot make a direct comparison without DeepSeek-V2.5's cutoff date.

DeepSeek-V2.5

—

Phi 4 Reasoning Plus

Mar 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

DeepSeek
Larger context window (8,192 tokens)
Microsoft
Higher Arena Hard score (79.0% vs 76.2%)

Detailed Comparison

AI Model Comparison Table
Feature
DeepSeek
DeepSeek-V2.5
Microsoft
Phi 4 Reasoning Plus

FAQ

Common questions about DeepSeek-V2.5 vs Phi 4 Reasoning Plus.

Which is better, DeepSeek-V2.5 or Phi 4 Reasoning Plus?

Phi 4 Reasoning Plus significantly outperforms across most benchmarks. DeepSeek-V2.5 is made by DeepSeek and Phi 4 Reasoning Plus is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does DeepSeek-V2.5 compare to Phi 4 Reasoning Plus in benchmarks?

DeepSeek-V2.5 scores GSM8k: 95.1%, MT-Bench: 90.2%, HumanEval: 89.0%, BBH: 84.3%, AlignBench: 80.4%. 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 DeepSeek-V2.5 and Phi 4 Reasoning Plus?

DeepSeek-V2.5 supports 8K 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 DeepSeek-V2.5 and Phi 4 Reasoning Plus?

Key differences include licensing (deepseek vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V2.5 and Phi 4 Reasoning Plus?

DeepSeek-V2.5 is developed by DeepSeek and Phi 4 Reasoning Plus is developed by Microsoft.