The AI arena is free today

Open Superagent

Claude Opus 5.5 vs Phi-4-multimodal-instruct

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 2.8. Phi-4-multimodal-instruct is 128.0x cheaper per token.

Anthropic · Microsoft · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 59.7 to 2.8, ranking #1 overall.

On price, Phi-4-multimodal-instruct is roughly 128.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 5.5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Claude Opus 5.5

  • overall performance matters — it scores 59.7 and ranks #1 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose Phi-4-multimodal-instruct

  • cost matters — it's about 128.0x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
Phi-4-multimodal-instruct
Microsoft
Core performance indexes
LLM Stats Score
59.7
#1
2.8
#318
Reasoning
57.8
#1
-0.2
#326
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
$0.05 / M
Output price
$20.00 / M
$0.10 / M
Context window
1,000,000
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Claude Opus 5.5
Phi-4-multimodal-instruct
Vision
42.8#1
1.6#177
Multimodal
42.5#1
3.6#146
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 15 for Phi-4-multimodal-instruct

No common benchmarks found

Claude Opus 5.5 and Phi-4-multimodal-instructdon'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

Pricing Analysis

Price comparison per million tokens

Phi-4-multimodal-instruct costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 80.0x more expensive than Phi-4-multimodal-instruct ($0.05/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 200.0x more expensive than Phi-4-multimodal-instruct ($0.10/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than Phi-4-multimodal-instruct.*

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

Lowest available price from all providers
Tue Sep 22 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
Microsoft
Phi-4-multimodal-instruct
Input tokens$0.05
Output tokens$0.10
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5.5 accepts 1,000,000 input tokens compared to Phi-4-multimodal-instruct's 128,000 tokens. Both models can generate responses up to 128,000 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Microsoft
Phi-4-multimodal-instruct
Input128,000 tokens
Output128,000 tokens
Tue Sep 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 5.5 and Phi-4-multimodal-instruct support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 5.5

Text
Images
Audio
Video

Phi-4-multimodal-instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 5.5 is licensed under a proprietary license, while Phi-4-multimodal-instruct uses MIT.

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

Claude Opus 5.5

Proprietary

Closed source

Phi-4-multimodal-instruct

MIT

Open weights

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Phi-4-multimodal-instruct was released on 2025-02-01.

Claude Opus 5.5 is 20 months newer than Phi-4-multimodal-instruct.

Claude Opus 5.5

Sep 22, 2026

0 days ago

1.6yr newer
Phi-4-multimodal-instruct

Feb 1, 2025

1.6 years ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a knowledge cutoff of 2026-06-01, while Phi-4-multimodal-instruct has a cutoff of 2024-06-01.

Claude Opus 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-multimodal-instruct (2024-06-01).

Claude Opus 5.5

Jun 2026

2 yr newer
Phi-4-multimodal-instruct

Jun 2024

Provider Availability

Claude Opus 5.5 is available from Anthropic. Phi-4-multimodal-instruct is available from DeepInfra.

Claude Opus 5.5

anthropic logo
Anthropic
Input Price:Input: $4.00/1MOutput Price:Output: $20.00/1M

Phi-4-multimodal-instruct

deepinfra logo
Deepinfra
Input Price:Input: $0.05/1MOutput Price:Output: $0.10/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

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

Claude Opus 5.5
✓ Preferred
Phi-4-multimodal-instruct
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Phi-4-multimodal-instruct.

Which is better, Claude Opus 5.5 or Phi-4-multimodal-instruct?

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 2.8. Claude Opus 5.5 is made by Anthropic and Phi-4-multimodal-instruct 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 Opus 5.5 compare to Phi-4-multimodal-instruct in benchmarks?

Claude Opus 5.5 scores BenchCAD (with Python tool): 96.2%, Global-MMLU: 94.3%, SWE-bench Multilingual: 93.9%, MILU: 93.1%, ArXivMath: 91.2%. Phi-4-multimodal-instruct scores ScienceQA Visual: 97.5%, DocVQA: 93.2%, MMBench: 86.7%, POPE: 85.6%, OCRBench: 84.4%.

Is Claude Opus 5.5 cheaper than Phi-4-multimodal-instruct?

Phi-4-multimodal-instruct is 80.0x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. Phi-4-multimodal-instruct costs $0.05/M input and $0.10/M output via deepinfra.

What are the context window sizes for Claude Opus 5.5 and Phi-4-multimodal-instruct?

Claude Opus 5.5 supports 1.0M tokens and Phi-4-multimodal-instruct supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 5.5 and Phi-4-multimodal-instruct?

Key differences include LLM Stats Score (59.7 vs 2.8), context window (1.0M vs 128K), input pricing ($4.00 vs $0.05/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and Phi-4-multimodal-instruct?

Claude Opus 5.5 is developed by Anthropic and Phi-4-multimodal-instruct is developed by Microsoft.

Related comparisons