Model Comparison

Claude 3 Opus vs Phi-3.5-MoE-instructWhich is better in 2026?

Claude 3 Opus significantly outperforms across most benchmarks.

Verdict: Claude 3 Opus vs Phi-3.5-MoE-instruct — which is better?

Claude 3 Opus (by Anthropic) and Phi-3.5-MoE-instruct (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 Opus outperforms in 10 benchmarks (ARC-C, BIG-Bench Hard, GPQA, GSM8k, HellaSwag, HumanEval, MATH, MGSM, MMLU, MMLU-Pro), while Phi-3.5-MoE-instruct is better at 0 benchmarks. Claude 3 Opus significantly outperforms across most benchmarks.

Choose Claude 3 Opus if…

  • you want the strongest raw capability — it leads on 10 of 10 shared benchmarks

Choose Phi-3.5-MoE-instruct if…

  • you want the most recent training data — it shipped Aug 2024
  • 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

10 benchmarks

Claude 3 Opus outperforms in 10 benchmarks (ARC-C, BIG-Bench Hard, GPQA, GSM8k, HellaSwag, HumanEval, MATH, MGSM, MMLU, MMLU-Pro), while Phi-3.5-MoE-instruct is better at 0 benchmarks.

Claude 3 Opus significantly outperforms across most benchmarks.

Fri Jun 12 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

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

Anthropic
Claude 3 Opus
Input200,000 tokens
Output200,000 tokens
Microsoft
Phi-3.5-MoE-instruct
Input- tokens
Output- tokens
Fri Jun 12 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Opus supports multimodal inputs, whereas Phi-3.5-MoE-instruct does not.

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

Claude 3 Opus

Text
Images
Audio
Video

Phi-3.5-MoE-instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3 Opus is licensed under a proprietary license, while Phi-3.5-MoE-instruct uses MIT.

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

Claude 3 Opus

Proprietary

Closed source

Phi-3.5-MoE-instruct

MIT

Open weights

Release Timeline

When each model was launched

Claude 3 Opus was released on 2024-02-29, while Phi-3.5-MoE-instruct was released on 2024-08-23.

Phi-3.5-MoE-instruct is 6 months newer than Claude 3 Opus.

Claude 3 Opus

Feb 29, 2024

2.3 years ago

Phi-3.5-MoE-instruct

Aug 23, 2024

1.8 years ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher ARC-C score (96.4% vs 91.0%)
Higher BIG-Bench Hard score (86.8% vs 79.1%)
Higher GPQA score (50.4% vs 36.8%)
Higher GSM8k score (95.0% vs 88.7%)
Higher HellaSwag score (95.4% vs 83.8%)
Higher HumanEval score (84.9% vs 70.7%)
Higher MATH score (60.1% vs 59.5%)
Higher MGSM score (90.7% vs 58.7%)
Higher MMLU score (86.8% vs 78.9%)
Higher MMLU-Pro score (68.5% vs 45.3%)
Microsoft
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3 Opus
Microsoft
Phi-3.5-MoE-instruct

FAQ

Common questions about Claude 3 Opus vs Phi-3.5-MoE-instruct.

Which is better, Claude 3 Opus or Phi-3.5-MoE-instruct?

Claude 3 Opus significantly outperforms across most benchmarks. Claude 3 Opus is made by Anthropic and Phi-3.5-MoE-instruct is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3 Opus compare to Phi-3.5-MoE-instruct in benchmarks?

Claude 3 Opus scores ARC-C: 96.4%, HellaSwag: 95.4%, GSM8k: 95.0%, MGSM: 90.7%, BIG-Bench Hard: 86.8%. Phi-3.5-MoE-instruct scores ARC-C: 91.0%, OpenBookQA: 89.6%, GSM8k: 88.7%, PIQA: 88.6%, RULER: 87.1%.

What are the context window sizes for Claude 3 Opus and Phi-3.5-MoE-instruct?

Claude 3 Opus supports 200K tokens and Phi-3.5-MoE-instruct 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 Opus and Phi-3.5-MoE-instruct?

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 Opus and Phi-3.5-MoE-instruct?

Claude 3 Opus is developed by Anthropic and Phi-3.5-MoE-instruct is developed by Microsoft.

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