GPT-5.5 Instant vs LFM3-1.7B
GPT-5.5 Instant leads the LLM Stats Score 31.8 to 25.0.
OpenAI · Liquid AI · Updated for 2026
Which is better?
GPT-5.5 Instant leads the overall LLM Stats Score 31.8 to 25.0, ranking #136 overall.
In the 1 individual benchmarks reported for both models, GPT-5.5 Instant wins 1; 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 Instant
- overall performance matters — it scores 31.8 and ranks #136 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 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.
Individual benchmarks
9 reported for GPT-5.5 Instant · 20 for LFM3-1.7B
GPT-5.5 Instant outperforms in 1 benchmarks (GPQA), while LFM3-1.7B is better at 0 benchmarks.
GPT-5.5 Instant 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 Instant specifies input context (400,000 tokens). Only GPT-5.5 Instant specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.5 Instant supports multimodal inputs, whereas LFM3-1.7B does not.
GPT-5.5 Instant can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.5 Instant
LFM3-1.7B
License
Usage and distribution terms
GPT-5.5 Instant 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 Instant was released on 2026-05-05, while LFM3-1.7B was released on 2026-10-27.
LFM3-1.7B is 6 months newer than GPT-5.5 Instant.
May 5, 2026
6 months ago
Oct 27, 2026
1 weeks ago
5mo newerKnowledge Cutoff
When training data ends
GPT-5.5 Instant has a documented knowledge cutoff of 2025-08-31, while LFM3-1.7B's cutoff date is not specified.
We can confirm GPT-5.5 Instant's training data extends to 2025-08-31, but cannot make a direct comparison without LFM3-1.7B's cutoff date.
Aug 2025
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.5 Instant and LFM3-1.7B side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.5 Instant vs LFM3-1.7B.