GPT-5.5 vs LFM3-1.7B
GPT-5.5 leads the LLM Stats Score 47.0 to 25.0.
OpenAI · Liquid AI · Updated for 2026
Which is better?
GPT-5.5 leads the overall LLM Stats Score 47.0 to 25.0, ranking #40 overall.
In the 3 individual benchmarks reported for both models, GPT-5.5 wins 3; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.5
- overall performance matters — it scores 47.0 and ranks #40 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 3 of 3 exact shared results
Choose LFM3-1.7B
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
28 reported for GPT-5.5 · 20 for LFM3-1.7B
GPT-5.5 outperforms in 3 benchmarks (GPQA, Humanity's Last Exam, MCP Atlas), while LFM3-1.7B is better at 0 benchmarks.
GPT-5.5 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-5.5 specifies input context (1,050,000 tokens). Only GPT-5.5 specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.5 supports multimodal inputs, whereas LFM3-1.7B does not.
GPT-5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.5
LFM3-1.7B
License
Usage and distribution terms
GPT-5.5 is licensed under a proprietary license, while LFM3-1.7B uses LFM Open License v1.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
LFM Open License v1.0
Open weights
Release Timeline
When each model was launched
GPT-5.5 was released on 2026-04-23, while LFM3-1.7B was released on 2026-10-27.
LFM3-1.7B is 6 months newer than GPT-5.5.
Apr 23, 2026
6 months ago
Oct 27, 2026
1 weeks ago
6mo newerKnowledge Cutoff
When training data ends
GPT-5.5 has a documented knowledge cutoff of 2025-12-01, while LFM3-1.7B's cutoff date is not specified.
We can confirm GPT-5.5's training data extends to 2025-12-01, but cannot make a direct comparison without LFM3-1.7B's cutoff date.
Dec 2025
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.5 and LFM3-1.7B side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.5 vs LFM3-1.7B.