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GPT-5.1 Medium vs LFM3-1.7B

GPT-5.1 Medium leads the LLM Stats Score 30.9 to 25.0.

OpenAI · Liquid AI · Updated for 2026

Which is better?

GPT-5.1 Medium leads the overall LLM Stats Score 30.9 to 25.0, ranking #143 overall.

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

Choose GPT-5.1 Medium

  • overall performance matters — it scores 30.9 and ranks #143 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes

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.

GPT-5.1 Medium
OpenAI
LFM3-1.7B
Liquid AI
Core performance indexes
LLM Stats Score
30.9
#143
25.0
#191
Reasoning
30.3
#144
20.8
#216
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.25 / M
— / M
Output price
$10.00 / M
— / M
Context window
400,000
—

Individual benchmarks

1 reported for GPT-5.1 Medium · 20 for LFM3-1.7B

No common benchmarks found

GPT-5.1 Medium and LFM3-1.7Bdon'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 GPT-5.1 Medium specifies input context (400,000 tokens). Only GPT-5.1 Medium specifies output context (128,000 tokens).

OpenAI
GPT-5.1 Medium
Input400,000 tokens
Output128,000 tokens
Liquid AI
LFM3-1.7B
Input- tokens
Output- tokens
Fri Nov 06 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.1 Medium supports multimodal inputs, whereas LFM3-1.7B does not.

GPT-5.1 Medium can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.1 Medium

Text
Images
Audio
Video

LFM3-1.7B

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.1 Medium 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.

GPT-5.1 Medium

Proprietary

Closed source

LFM3-1.7B

LFM Open License v1.0

Open weights

Release Timeline

When each model was launched

GPT-5.1 Medium was released on 2025-11-12, while LFM3-1.7B was released on 2026-10-27.

LFM3-1.7B is 12 months newer than GPT-5.1 Medium.

GPT-5.1 Medium

Nov 12, 2025

11 months ago

LFM3-1.7B

Oct 27, 2026

1 weeks ago

11mo 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?

Judge for yourself.

Run your own prompts against GPT-5.1 Medium and LFM3-1.7B side-by-side, then vote on the output you prefer.

GPT-5.1 Medium
✓ Preferred
LFM3-1.7B
Open in Playground

FAQ

Common questions about GPT-5.1 Medium vs LFM3-1.7B.

Which is better, GPT-5.1 Medium or LFM3-1.7B?

GPT-5.1 Medium leads the LLM Stats Score 30.9 to 25.0. GPT-5.1 Medium is made by OpenAI and LFM3-1.7B 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 GPT-5.1 Medium compare to LFM3-1.7B in benchmarks?

GPT-5.1 Medium scores AIME 2025: 98.4%. LFM3-1.7B scores IFEval: 96.7%, Multi-IF: 89.1%, LiveCodeBench v6: 73.5%, IFBench: 73.0%, BFCL-V4: 71.4%.

What are the context window sizes for GPT-5.1 Medium and LFM3-1.7B?

GPT-5.1 Medium supports 400K tokens and LFM3-1.7B 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 GPT-5.1 Medium and LFM3-1.7B?

Key differences include LLM Stats Score (30.9 vs 25.0), multimodal support (yes vs no), licensing (Proprietary vs LFM Open License v1.0). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.1 Medium and LFM3-1.7B?

GPT-5.1 Medium is developed by OpenAI and LFM3-1.7B is developed by Liquid AI.

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