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Claude Sonnet 5.5 vs LFM2.5-VL-3B

Claude Sonnet 5.5 leads the LLM Stats Score 58.4 to 2.7.

Anthropic · Liquid AI · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.4 to 2.7, ranking #2 overall.

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

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.4 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose LFM2.5-VL-3B

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
LFM2.5-VL-3B
Liquid AI
Core performance indexes
LLM Stats Score
58.4
#2
2.7
#335
Reasoning
57.2
#3
-2.7
#356
Agents
43.3
#3
-5.2
#208
Cost, coverage & limits
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Claude Sonnet 5.5
LFM2.5-VL-3B
Vision
41.5#2
1.1#196
Multimodal
41.1#2
2.9#162
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 23 for LFM2.5-VL-3B

No common benchmarks found

Claude Sonnet 5.5 and LFM2.5-VL-3Bdon'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

Context Window

Maximum input and output token capacity

Only Claude Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
Liquid AI
LFM2.5-VL-3B
Input- tokens
Output- tokens
Fri Oct 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Sonnet 5.5 and LFM2.5-VL-3B support multimodal inputs.

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

Claude Sonnet 5.5

Text
Images
Audio
Video

LFM2.5-VL-3B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 5.5 is licensed under a proprietary license, while LFM2.5-VL-3B uses LFM Open License v1.0.

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

Claude Sonnet 5.5

Proprietary

Closed source

LFM2.5-VL-3B

LFM Open License v1.0

Open weights

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while LFM2.5-VL-3B was released on 2026-08-12.

Claude Sonnet 5.5 is 2 months newer than LFM2.5-VL-3B.

Claude Sonnet 5.5

Sep 28, 2026

3 weeks ago

1mo newer
LFM2.5-VL-3B

Aug 12, 2026

2 months ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a documented knowledge cutoff of 2026-06-01, while LFM2.5-VL-3B's cutoff date is not specified.

We can confirm Claude Sonnet 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without LFM2.5-VL-3B's cutoff date.

Claude Sonnet 5.5

Jun 2026

LFM2.5-VL-3B

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and LFM2.5-VL-3B side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
LFM2.5-VL-3B
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs LFM2.5-VL-3B.

Which is better, Claude Sonnet 5.5 or LFM2.5-VL-3B?

Claude Sonnet 5.5 leads the LLM Stats Score 58.4 to 2.7. Claude Sonnet 5.5 is made by Anthropic and LFM2.5-VL-3B is made by Liquid AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Sonnet 5.5 compare to LFM2.5-VL-3B in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. LFM2.5-VL-3B scores DocVQA: 91.1%, POPE: 88.7%, RefCOCO-avg: 87.9%, TextVQA: 84.3%, OCRBench: 84.2%.

What are the context window sizes for Claude Sonnet 5.5 and LFM2.5-VL-3B?

Claude Sonnet 5.5 supports 1.0M tokens and LFM2.5-VL-3B 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 Sonnet 5.5 and LFM2.5-VL-3B?

Key differences include LLM Stats Score (58.4 vs 2.7), licensing (Proprietary vs LFM Open License v1.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and LFM2.5-VL-3B?

Claude Sonnet 5.5 is developed by Anthropic and LFM2.5-VL-3B is developed by Liquid AI.

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