Model Comparison

GPT-5.6 Terra vs Phi 4 Mini ReasoningWhich is better in 2026?

GPT-5.6 Terra significantly outperforms across most benchmarks.

Verdict: GPT-5.6 Terra vs Phi 4 Mini Reasoning — which is better?

GPT-5.6 Terra (by OpenAI) and Phi 4 Mini Reasoning (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-5.6 Terra outperforms in 1 benchmarks (GPQA), while Phi 4 Mini Reasoning is better at 0 benchmarks. GPT-5.6 Terra significantly outperforms across most benchmarks.

Choose GPT-5.6 Terra if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose Phi 4 Mini Reasoning if…

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

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-5.6 Terra outperforms in 1 benchmarks (GPQA), while Phi 4 Mini Reasoning is better at 0 benchmarks.

GPT-5.6 Terra significantly outperforms across most benchmarks.

Sat Jul 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-5.6 Terra specifies input context (1,050,000 tokens). Only GPT-5.6 Terra specifies output context (128,000 tokens).

OpenAI
GPT-5.6 Terra
Input1,050,000 tokens
Output128,000 tokens
Microsoft
Phi 4 Mini Reasoning
Input- tokens
Output- tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.6 Terra supports multimodal inputs, whereas Phi 4 Mini Reasoning does not.

GPT-5.6 Terra can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.6 Terra

Text
Images
Audio
Video

Phi 4 Mini Reasoning

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.6 Terra is licensed under a proprietary license, while Phi 4 Mini Reasoning uses MIT.

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

GPT-5.6 Terra

Proprietary

Closed source

Phi 4 Mini Reasoning

MIT

Open weights

Release Timeline

When each model was launched

GPT-5.6 Terra was released on 2026-07-09, while Phi 4 Mini Reasoning was released on 2025-04-30.

GPT-5.6 Terra is 15 months newer than Phi 4 Mini Reasoning.

GPT-5.6 Terra

Jul 9, 2026

1 weeks ago

1.2yr newer
Phi 4 Mini Reasoning

Apr 30, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

GPT-5.6 Terra has a knowledge cutoff of 2026-02-16, while Phi 4 Mini Reasoning has a cutoff of 2025-02-01.

GPT-5.6 Terra has more recent training data (up to 2026-02-16), making it potentially better informed about events through that date compared to Phi 4 Mini Reasoning (2025-02-01).

GPT-5.6 Terra

Feb 2026

1 yr newer
Phi 4 Mini Reasoning

Feb 2025

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
Supports multimodal inputs
Higher GPQA score (92.9% vs 52.0%)
Microsoft
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.6 Terra and Phi 4 Mini Reasoning side-by-side, then vote on the output you prefer.

GPT-5.6 Terra
✓ Preferred
Phi 4 Mini Reasoning
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.6 Terra
Microsoft
Phi 4 Mini Reasoning

FAQ

Common questions about GPT-5.6 Terra vs Phi 4 Mini Reasoning.

Which is better, GPT-5.6 Terra or Phi 4 Mini Reasoning?

GPT-5.6 Terra significantly outperforms across most benchmarks. GPT-5.6 Terra is made by OpenAI and Phi 4 Mini Reasoning is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.6 Terra compare to Phi 4 Mini Reasoning in benchmarks?

GPT-5.6 Terra scores Connectors: 100.0%, HealthBench Consensus: 95.1%, Search and Function-Calling: 94.6%, GPQA: 92.9%, Capture-the-Flag Challenges (Internal): 91.8%. Phi 4 Mini Reasoning scores MATH-500: 94.6%, AIME: 57.5%, GPQA: 52.0%.

What are the context window sizes for GPT-5.6 Terra and Phi 4 Mini Reasoning?

GPT-5.6 Terra supports 1.1M tokens and Phi 4 Mini 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 GPT-5.6 Terra and Phi 4 Mini Reasoning?

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

Who makes GPT-5.6 Terra and Phi 4 Mini Reasoning?

GPT-5.6 Terra is developed by OpenAI and Phi 4 Mini Reasoning is developed by Microsoft.

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