Model Comparison

GPT-4.5 vs Phi-3.5-MoE-instruct

GPT-4.5 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

GPT-4.5 outperforms in 5 benchmarks (GPQA, GSM8k, HumanEval, MMLU, MMMLU), while Phi-3.5-MoE-instruct is better at 0 benchmarks.

GPT-4.5 significantly outperforms across most benchmarks.

Tue May 26 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-4.5 specifies input context (128,000 tokens). Only GPT-4.5 specifies output context (4,096 tokens).

OpenAI
GPT-4.5
Input128,000 tokens
Output4,096 tokens
Microsoft
Phi-3.5-MoE-instruct
Input- tokens
Output- tokens
Tue May 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-4.5 supports multimodal inputs, whereas Phi-3.5-MoE-instruct does not.

GPT-4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-4.5

Text
Images
Audio
Video

Phi-3.5-MoE-instruct

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-4.5 is licensed under a proprietary license, while Phi-3.5-MoE-instruct uses MIT.

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

GPT-4.5

Proprietary

Closed source

Phi-3.5-MoE-instruct

MIT

Open weights

Release Timeline

When each model was launched

GPT-4.5 was released on 2025-02-27, while Phi-3.5-MoE-instruct was released on 2024-08-23.

GPT-4.5 is 6 months newer than Phi-3.5-MoE-instruct.

GPT-4.5

Feb 27, 2025

1.2 years ago

6mo newer
Phi-3.5-MoE-instruct

Aug 23, 2024

1.8 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (128,000 tokens)
Supports multimodal inputs
Higher GPQA score (69.5% vs 36.8%)
Higher GSM8k score (97.0% vs 88.7%)
Higher HumanEval score (88.0% vs 70.7%)
Higher MMLU score (90.8% vs 78.9%)
Higher MMMLU score (85.1% vs 69.9%)
Microsoft
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4.5
Microsoft
Phi-3.5-MoE-instruct

FAQ

Common questions about GPT-4.5 vs Phi-3.5-MoE-instruct.

Which is better, GPT-4.5 or Phi-3.5-MoE-instruct?

GPT-4.5 significantly outperforms across most benchmarks. GPT-4.5 is made by OpenAI and Phi-3.5-MoE-instruct is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4.5 compare to Phi-3.5-MoE-instruct in benchmarks?

GPT-4.5 scores GSM8k: 97.0%, MMLU: 90.8%, CharXiv-D: 90.0%, IFEval: 88.2%, HumanEval: 88.0%. Phi-3.5-MoE-instruct scores ARC-C: 91.0%, OpenBookQA: 89.6%, GSM8k: 88.7%, PIQA: 88.6%, RULER: 87.1%.

What are the context window sizes for GPT-4.5 and Phi-3.5-MoE-instruct?

GPT-4.5 supports 128K tokens and Phi-3.5-MoE-instruct 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-4.5 and Phi-3.5-MoE-instruct?

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-4.5 and Phi-3.5-MoE-instruct?

GPT-4.5 is developed by OpenAI and Phi-3.5-MoE-instruct is developed by Microsoft.