Model Comparison

Claude Sonnet 4 vs Phi 4

Claude Sonnet 4 significantly outperforms across most benchmarks. Phi 4 is 68.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Sonnet 4 outperforms in 1 benchmarks (GPQA), while Phi 4 is better at 0 benchmarks.

Claude Sonnet 4 significantly outperforms across most benchmarks.

Fri May 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Phi 4 costs less

For input processing, Claude Sonnet 4 ($3.00/1M tokens) is 42.9x more expensive than Phi 4 ($0.07/1M tokens).

For output processing, Claude Sonnet 4 ($15.00/1M tokens) is 107.1x more expensive than Phi 4 ($0.14/1M tokens).

In conclusion, Claude Sonnet 4 is more expensive than Phi 4.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri May 15 2026 • llm-stats.com
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Microsoft
Phi 4
Input tokens$0.07
Output tokens$0.14
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Sonnet 4 accepts 200,000 input tokens compared to Phi 4's 16,000 tokens. Claude Sonnet 4 can generate longer responses up to 64,000 tokens, while Phi 4 is limited to 16,000 tokens.

Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
Microsoft
Phi 4
Input16,000 tokens
Output16,000 tokens
Fri May 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

Claude Sonnet 4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 4

Text
Images
Audio
Video

Phi 4

Text
Images
Audio
Video

License

Usage and distribution terms

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

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

Claude Sonnet 4

Proprietary

Closed source

Phi 4

MIT

Open weights

Release Timeline

When each model was launched

Claude Sonnet 4 was released on 2025-05-22, while Phi 4 was released on 2024-12-12.

Claude Sonnet 4 is 5 months newer than Phi 4.

Claude Sonnet 4

May 22, 2025

11 months ago

5mo newer
Phi 4

Dec 12, 2024

1.4 years ago

Knowledge Cutoff

When training data ends

Phi 4 has a documented knowledge cutoff of 2024-06-01, while Claude Sonnet 4's cutoff date is not specified.

We can confirm Phi 4's training data extends to 2024-06-01, but cannot make a direct comparison without Claude Sonnet 4's cutoff date.

Claude Sonnet 4

—

Phi 4

Jun 2024

Provider Availability

Claude Sonnet 4 is available from Anthropic, Bedrock, Google. Phi 4 is available from DeepInfra.

Claude Sonnet 4

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Phi 4

deepinfra logo
Deepinfra
Input Price:Input: $0.07/1MOutput Price:Output: $0.14/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher GPQA score (75.4% vs 56.1%)
Microsoft
Less expensive input tokens
Less expensive output tokens
Has open weights
AnthropicClaude Sonnet 4
MicrosoftPhi 4
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4
Microsoft
Phi 4

FAQ

Common questions about Claude Sonnet 4 vs Phi 4.

Which is better, Claude Sonnet 4 or Phi 4?

Claude Sonnet 4 significantly outperforms across most benchmarks. Claude Sonnet 4 is made by Anthropic and Phi 4 is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

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

Claude Sonnet 4 scores MMMLU: 86.5%, TAU-bench Retail: 80.5%, GPQA: 75.4%, MMMU: 74.4%, SWE-Bench Verified: 72.7%. Phi 4 scores MMLU: 84.8%, HumanEval+: 82.8%, HumanEval: 82.6%, MGSM: 80.6%, MATH: 80.4%.

Is Claude Sonnet 4 cheaper than Phi 4?

Phi 4 is 42.9x cheaper for input tokens. Claude Sonnet 4 costs $3.00/M input and $15.00/M output via anthropic. Phi 4 costs $0.07/M input and $0.14/M output via deepinfra.

What are the context window sizes for Claude Sonnet 4 and Phi 4?

Claude Sonnet 4 supports 200K tokens and Phi 4 supports 16K 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 4 and Phi 4?

Key differences include context window (200K vs 16K), input pricing ($3.00 vs $0.07/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 4 and Phi 4?

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