Model Comparison

DeepSeek-V2.5 vs Phi 4 Reasoning

DeepSeek-V2.5 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

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

DeepSeek-V2.5 significantly outperforms across most benchmarks.

Thu May 14 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, making it 1585.7% larger.

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

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
Input- tokens
Output- tokens
Thu May 14 2026 • llm-stats.com

License

Usage and distribution terms

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

MIT

Open weights

Release Timeline

When each model was launched

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

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

DeepSeek-V2.5

May 8, 2024

2.0 years ago

Phi 4 Reasoning

Apr 30, 2025

1.0 years ago

11mo newer

Knowledge Cutoff

When training data ends

Phi 4 Reasoning 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'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

Mar 2025

Outputs Comparison

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Key Takeaways

DeepSeek
Larger context window (8,192 tokens)
Higher Arena Hard score (76.2% vs 73.3%)
Microsoft

No standout differentiators in the data we have for this pair.

Detailed Comparison

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

FAQ

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

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

DeepSeek-V2.5 significantly outperforms across most benchmarks. DeepSeek-V2.5 is made by DeepSeek and Phi 4 Reasoning 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 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 scores FlenQA: 97.7%, HumanEval+: 92.9%, IFEval: 83.4%, OmniMath: 76.6%, AIME 2024: 75.3%.

What are the context window sizes for DeepSeek-V2.5 and Phi 4 Reasoning?

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

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?

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