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Claude Sonnet 5.5 vs Phi 4 Mini

Claude Sonnet 5.5 leads the LLM Stats Score 58.0 to -4.1.

Anthropic · Microsoft · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.0 to -4.1, ranking #3 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.0 and ranks #3 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Phi 4 Mini

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

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
Phi 4 Mini
Microsoft
Core performance indexes
LLM Stats Score
58.0
#3
-4.1
#355
Reasoning
56.6
#3
-4.2
#348
Cost, coverage & limits
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Sonnet 5.5
Phi 4 Mini
Math
36.9#34
2.3#295
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 17 for Phi 4 Mini

No common benchmarks found

Claude Sonnet 5.5 and Phi 4 Minidon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
Microsoft
Phi 4 Mini
Input- tokens
Output- tokens
Wed Sep 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Sonnet 5.5 supports multimodal inputs, whereas Phi 4 Mini does not.

Claude Sonnet 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 5.5

Text
Images
Audio
Video

Phi 4 Mini

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 5.5 is licensed under a proprietary license, while Phi 4 Mini uses MIT.

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

Claude Sonnet 5.5

Proprietary

Closed source

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while Phi 4 Mini was released on 2025-02-01.

Claude Sonnet 5.5 is 20 months newer than Phi 4 Mini.

Claude Sonnet 5.5

Sep 28, 2026

1 days ago

1.7yr newer
Phi 4 Mini

Feb 1, 2025

1.7 years ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a knowledge cutoff of 2026-06-01, while Phi 4 Mini has a cutoff of 2024-06-01.

Claude Sonnet 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Phi 4 Mini (2024-06-01).

Claude Sonnet 5.5

Jun 2026

2 yr newer
Phi 4 Mini

Jun 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and Phi 4 Mini side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
Phi 4 Mini
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs Phi 4 Mini.

Which is better, Claude Sonnet 5.5 or Phi 4 Mini?

Claude Sonnet 5.5 leads the LLM Stats Score 58.0 to -4.1. Claude Sonnet 5.5 is made by Anthropic and Phi 4 Mini is made by Microsoft. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Sonnet 5.5 compare to Phi 4 Mini in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. 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 Claude Sonnet 5.5 and Phi 4 Mini?

Claude Sonnet 5.5 supports 1.0M 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 Claude Sonnet 5.5 and Phi 4 Mini?

Key differences include LLM Stats Score (58.0 vs -4.1), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and Phi 4 Mini?

Claude Sonnet 5.5 is developed by Anthropic and Phi 4 Mini is developed by Microsoft.

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