Model Comparison

GLM-4.5-Air vs Phi 4 ReasoningWhich is better in 2026?

GLM-4.5-Air significantly outperforms across most benchmarks.

Verdict: GLM-4.5-Air vs Phi 4 Reasoning — which is better?

GLM-4.5-Air (by Zhipu AI) and Phi 4 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.

GLM-4.5-Air outperforms in 4 benchmarks (AIME 2024, GPQA, LiveCodeBench, MMLU-Pro), while Phi 4 Reasoning is better at 0 benchmarks. GLM-4.5-Air significantly outperforms across most benchmarks.

Choose GLM-4.5-Air if…

  • you want the strongest raw capability — it leads on 4 of 4 shared benchmarks
  • you want the most recent training data — it shipped Jul 2025

Choose Phi 4 Reasoning if…

  • you are already invested in the Microsoft ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

GLM-4.5-Air outperforms in 4 benchmarks (AIME 2024, GPQA, LiveCodeBench, MMLU-Pro), while Phi 4 Reasoning is better at 0 benchmarks.

GLM-4.5-Air significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

92.0B diff

GLM-4.5-Air has 92.0B more parameters than Phi 4 Reasoning, making it 657.1% larger.

Zhipu AI
GLM-4.5-Air
106.0Bparameters
Microsoft
Phi 4 Reasoning
14.0Bparameters
106.0B
GLM-4.5-Air
14.0B
Phi 4 Reasoning

License

Usage and distribution terms

Both models are licensed under MIT.

Both models share the same licensing terms, providing consistent usage rights.

GLM-4.5-Air

MIT

Open weights

Phi 4 Reasoning

MIT

Open weights

Release Timeline

When each model was launched

GLM-4.5-Air was released on 2025-07-28, while Phi 4 Reasoning was released on 2025-04-30.

GLM-4.5-Air is 3 months newer than Phi 4 Reasoning.

GLM-4.5-Air

Jul 28, 2025

11 months ago

2mo newer
Phi 4 Reasoning

Apr 30, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

Phi 4 Reasoning has a documented knowledge cutoff of 2025-03-01, while GLM-4.5-Air'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 GLM-4.5-Air's cutoff date.

GLM-4.5-Air

—

Phi 4 Reasoning

Mar 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Zhipu AI
Higher AIME 2024 score (89.4% vs 75.3%)
Higher GPQA score (75.0% vs 65.8%)
Higher LiveCodeBench score (70.7% vs 53.8%)
Higher MMLU-Pro score (81.4% vs 74.3%)
Microsoft

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

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GLM-4.5-Air and Phi 4 Reasoning side-by-side, then vote on the output you prefer.

GLM-4.5-Air
✓ Preferred
Phi 4 Reasoning
Open in Playground
AI Model Comparison Table
Feature
Zhipu AI
GLM-4.5-Air
Microsoft
Phi 4 Reasoning

FAQ

Common questions about GLM-4.5-Air vs Phi 4 Reasoning.

Which is better, GLM-4.5-Air or Phi 4 Reasoning?

GLM-4.5-Air significantly outperforms across most benchmarks. GLM-4.5-Air is made by Zhipu AI 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 GLM-4.5-Air compare to Phi 4 Reasoning in benchmarks?

GLM-4.5-Air scores MATH-500: 98.1%, AIME 2024: 89.4%, MMLU-Pro: 81.4%, TAU-bench Retail: 77.9%, BFCL-v3: 76.4%. Phi 4 Reasoning scores FlenQA: 97.7%, HumanEval+: 92.9%, IFEval: 83.4%, OmniMath: 76.6%, AIME 2024: 75.3%.

Who makes GLM-4.5-Air and Phi 4 Reasoning?

GLM-4.5-Air is developed by Zhipu AI and Phi 4 Reasoning is developed by Microsoft.

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