Model Comparison

GPT OSS 120B vs Phi 4 Mini

GPT OSS 120B significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT OSS 120B outperforms in 2 benchmarks (GPQA, MMLU), while Phi 4 Mini is better at 0 benchmarks.

GPT OSS 120B significantly outperforms across most benchmarks.

Wed May 20 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

113.0B diff

GPT OSS 120B has 113.0B more parameters than Phi 4 Mini, making it 2941.7% larger.

OpenAI
GPT OSS 120B
116.8Bparameters
Microsoft
Phi 4 Mini
3.8Bparameters
116.8B
GPT OSS 120B
3.8B
Phi 4 Mini

Context Window

Maximum input and output token capacity

Only GPT OSS 120B specifies input context (131,072 tokens). Only GPT OSS 120B specifies output context (131,072 tokens).

OpenAI
GPT OSS 120B
Input131,072 tokens
Output131,072 tokens
Microsoft
Phi 4 Mini
Input- tokens
Output- tokens
Wed May 20 2026 • llm-stats.com

License

Usage and distribution terms

GPT OSS 120B 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 120B

Apache 2.0

Open weights

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

GPT OSS 120B was released on 2025-08-05, while Phi 4 Mini was released on 2025-02-01.

GPT OSS 120B is 6 months newer than Phi 4 Mini.

GPT OSS 120B

Aug 5, 2025

9 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 120B'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 120B's cutoff date.

GPT OSS 120B

—

Phi 4 Mini

Jun 2024

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (131,072 tokens)
Higher GPQA score (80.1% vs 25.2%)
Higher MMLU score (90.0% vs 67.3%)
Microsoft

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

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT OSS 120B
Microsoft
Phi 4 Mini

FAQ

Common questions about GPT OSS 120B vs Phi 4 Mini.

Which is better, GPT OSS 120B or Phi 4 Mini?

GPT OSS 120B significantly outperforms across most benchmarks. GPT OSS 120B 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 120B compare to Phi 4 Mini in benchmarks?

GPT OSS 120B scores MMLU: 90.0%, CodeForces: 82.1%, GPQA: 80.1%, TAU-bench Retail: 67.8%, HealthBench: 57.6%. 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 120B and Phi 4 Mini?

GPT OSS 120B 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 120B 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 120B and Phi 4 Mini?

GPT OSS 120B is developed by OpenAI and Phi 4 Mini is developed by Microsoft.