Model Comparison

Claude 3 Haiku vs Phi 4 Reasoning PlusWhich is better in 2026?

Phi 4 Reasoning Plus significantly outperforms across most benchmarks.

Verdict: Claude 3 Haiku vs Phi 4 Reasoning Plus — which is better?

Claude 3 Haiku (by Anthropic) and Phi 4 Reasoning Plus (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.

Claude 3 Haiku outperforms in 0 benchmarks, while Phi 4 Reasoning Plus is better at 1 benchmark (GPQA). Phi 4 Reasoning Plus significantly outperforms across most benchmarks.

Choose Claude 3 Haiku if…

  • you want predictable pricing at $0.25/M input and $1.25/M output

Choose Phi 4 Reasoning Plus if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Apr 2025
  • you need open weights you can self-host or fine-tune
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude 3 Haiku outperforms in 0 benchmarks, while Phi 4 Reasoning Plus is better at 1 benchmark (GPQA).

Phi 4 Reasoning Plus significantly outperforms across most benchmarks.

Sat Jun 06 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Claude 3 Haiku specifies input context (200,000 tokens). Only Claude 3 Haiku specifies output context (200,000 tokens).

Anthropic
Claude 3 Haiku
Input200,000 tokens
Output200,000 tokens
Microsoft
Phi 4 Reasoning Plus
Input- tokens
Output- tokens
Sat Jun 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Haiku supports multimodal inputs, whereas Phi 4 Reasoning Plus does not.

Claude 3 Haiku can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3 Haiku

Text
Images
Audio
Video

Phi 4 Reasoning Plus

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3 Haiku is licensed under a proprietary license, while Phi 4 Reasoning Plus uses MIT.

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

Claude 3 Haiku

Proprietary

Closed source

Phi 4 Reasoning Plus

MIT

Open weights

Release Timeline

When each model was launched

Claude 3 Haiku was released on 2024-03-13, while Phi 4 Reasoning Plus was released on 2025-04-30.

Phi 4 Reasoning Plus is 14 months newer than Claude 3 Haiku.

Claude 3 Haiku

Mar 13, 2024

2.2 years ago

Phi 4 Reasoning Plus

Apr 30, 2025

1.1 years ago

1.1yr newer

Knowledge Cutoff

When training data ends

Phi 4 Reasoning Plus has a documented knowledge cutoff of 2025-03-01, while Claude 3 Haiku's cutoff date is not specified.

We can confirm Phi 4 Reasoning Plus's training data extends to 2025-03-01, but cannot make a direct comparison without Claude 3 Haiku's cutoff date.

Claude 3 Haiku

—

Phi 4 Reasoning Plus

Mar 2025

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Microsoft
Has open weights
Higher GPQA score (68.9% vs 33.3%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3 Haiku
Microsoft
Phi 4 Reasoning Plus

FAQ

Common questions about Claude 3 Haiku vs Phi 4 Reasoning Plus.

Which is better, Claude 3 Haiku or Phi 4 Reasoning Plus?

Phi 4 Reasoning Plus significantly outperforms across most benchmarks. Claude 3 Haiku is made by Anthropic and Phi 4 Reasoning Plus is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3 Haiku compare to Phi 4 Reasoning Plus in benchmarks?

Claude 3 Haiku scores ARC-C: 89.2%, GSM8k: 88.9%, HellaSwag: 85.9%, DROP: 78.4%, HumanEval: 75.9%. Phi 4 Reasoning Plus scores FlenQA: 97.9%, HumanEval+: 92.3%, IFEval: 84.9%, OmniMath: 81.9%, AIME 2024: 81.3%.

What are the context window sizes for Claude 3 Haiku and Phi 4 Reasoning Plus?

Claude 3 Haiku supports 200K tokens and Phi 4 Reasoning Plus 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 3 Haiku and Phi 4 Reasoning Plus?

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

Who makes Claude 3 Haiku and Phi 4 Reasoning Plus?

Claude 3 Haiku is developed by Anthropic and Phi 4 Reasoning Plus is developed by Microsoft.

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