Model Comparison

GPT OSS 20B High vs Phi 4 MiniWhich is better in 2026?

GPT OSS 20B High significantly outperforms across most benchmarks.

Verdict: GPT OSS 20B High vs Phi 4 Mini — which is better?

GPT OSS 20B High (by OpenAI) and Phi 4 Mini (by Microsoft) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT OSS 20B High outperforms in 1 benchmarks (GPQA), while Phi 4 Mini is better at 0 benchmarks. GPT OSS 20B High significantly outperforms across most benchmarks.

Choose GPT OSS 20B High if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Aug 2025

Choose Phi 4 Mini if…

  • you are already invested in the Microsoft ecosystem
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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT OSS 20B High outperforms in 1 benchmarks (GPQA), while Phi 4 Mini is better at 0 benchmarks.

GPT OSS 20B High significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

17.1B diff

GPT OSS 20B High has 17.1B more parameters than Phi 4 Mini, making it 444.3% larger.

OpenAI
GPT OSS 20B High
20.9Bparameters
Microsoft
Phi 4 Mini
3.8Bparameters
20.9B
GPT OSS 20B High
3.8B
Phi 4 Mini

Context Window

Maximum input and output token capacity

Only GPT OSS 20B High specifies input context (131,072 tokens). Only GPT OSS 20B High specifies output context (131,072 tokens).

OpenAI
GPT OSS 20B High
Input131,072 tokens
Output131,072 tokens
Microsoft
Phi 4 Mini
Input- tokens
Output- tokens
Sun Jun 07 2026 • llm-stats.com

License

Usage and distribution terms

GPT OSS 20B High is licensed under Apache 2.0, while Phi 4 Mini uses MIT.

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

GPT OSS 20B High

Apache 2.0

Open weights

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

GPT OSS 20B High was released on 2025-08-05, while Phi 4 Mini was released on 2025-02-01.

GPT OSS 20B High is 6 months newer than Phi 4 Mini.

GPT OSS 20B High

Aug 5, 2025

10 months ago

6mo newer
Phi 4 Mini

Feb 1, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Phi 4 Mini has a documented knowledge cutoff of 2024-06-01, while GPT OSS 20B High's cutoff date is not specified.

We can confirm Phi 4 Mini's training data extends to 2024-06-01, but cannot make a direct comparison without GPT OSS 20B High's cutoff date.

GPT OSS 20B High

—

Phi 4 Mini

Jun 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (131,072 tokens)
Higher GPQA score (74.2% vs 25.2%)
Microsoft

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

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT OSS 20B High
Microsoft
Phi 4 Mini

FAQ

Common questions about GPT OSS 20B High vs Phi 4 Mini.

Which is better, GPT OSS 20B High or Phi 4 Mini?

GPT OSS 20B High significantly outperforms across most benchmarks. GPT OSS 20B High is made by OpenAI and Phi 4 Mini is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT OSS 20B High compare to Phi 4 Mini in benchmarks?

GPT OSS 20B High scores AIME 2025: 98.7%, GPQA: 74.2%. Phi 4 Mini scores GSM8k: 88.6%, ARC-C: 83.7%, BoolQ: 81.2%, OpenBookQA: 79.2%, PIQA: 77.6%.

What are the context window sizes for GPT OSS 20B High and Phi 4 Mini?

GPT OSS 20B High supports 131K tokens and Phi 4 Mini 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 GPT OSS 20B High and Phi 4 Mini?

Key differences include licensing (Apache 2.0 vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT OSS 20B High and Phi 4 Mini?

GPT OSS 20B High is developed by OpenAI and Phi 4 Mini is developed by Microsoft.

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