Claude 3.5 Sonnet vs Phi 4 Comparison

Comparing Claude 3.5 Sonnet and Phi 4 across benchmarks, pricing, and capabilities.

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Claude 3.5 Sonnet outperforms in 6 benchmarks (DROP, GPQA, HumanEval, MGSM, MMLU, MMLU-Pro), while Phi 4 is better at 1 benchmark (MATH).

Claude 3.5 Sonnet significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Phi 4 costs less

For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 42.9x more expensive than Phi 4 ($0.07/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 107.1x more expensive than Phi 4 ($0.14/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than Phi 4.*

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

Lowest available price from all providers
Tue Mar 17 2026 • llm-stats.com
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Microsoft
Phi 4
Input tokens$0.07
Output tokens$0.14
Best providerDeepinfra
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Context Window

Maximum input and output token capacity

Claude 3.5 Sonnet accepts 200,000 input tokens compared to Phi 4's 16,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while Phi 4 is limited to 16,000 tokens.

Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
Microsoft
Phi 4
Input16,000 tokens
Output16,000 tokens
Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas Phi 4 does not.

Claude 3.5 Sonnet can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.5 Sonnet

Text
Images
Audio
Video

Phi 4

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3.5 Sonnet 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 3.5 Sonnet

Proprietary

Closed source

Phi 4

MIT

Open weights

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-10-22, while Phi 4 was released on 2024-12-12.

Phi 4 is 2 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Oct 22, 2024

1.4 years ago

Phi 4

Dec 12, 2024

1.3 years ago

1mo newer

Knowledge Cutoff

When training data ends

Phi 4 has a documented knowledge cutoff of 2024-06-01, while Claude 3.5 Sonnet'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 3.5 Sonnet's cutoff date.

Claude 3.5 Sonnet

Phi 4

Jun 2024

Provider Availability

Claude 3.5 Sonnet is available from Anthropic, Bedrock, Google. Phi 4 is available from DeepInfra. The availability of providers can affect quality of the model and reliability.

Claude 3.5 Sonnet

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

Larger context window (200,000 tokens)
Supports multimodal inputs
Higher DROP score (87.1% vs 75.5%)
Higher GPQA score (67.2% vs 56.1%)
Higher HumanEval score (93.7% vs 82.6%)
Higher MGSM score (91.6% vs 80.6%)
Higher MMLU score (90.4% vs 84.8%)
Higher MMLU-Pro score (77.6% vs 70.4%)
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher MATH score (80.4% vs 78.3%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Sonnet
Microsoft
Phi 4