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GPT-5.3 Codex vs LFM3-1.7B

GPT-5.3 Codex leads the LLM Stats Score 36.1 to 25.0.

OpenAI · Liquid AI · Updated for 2026

Which is better?

GPT-5.3 Codex leads the overall LLM Stats Score 36.1 to 25.0, ranking #103 overall.

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

Choose GPT-5.3 Codex

  • overall performance matters — it scores 36.1 and ranks #103 on LLM Stats
  • your work emphasizes reasoning and coding — 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-5.3 Codex
OpenAI
LFM3-1.7B
Liquid AI
Core performance indexes
LLM Stats Score
36.1
#103
25.0
#191
Reasoning
36.8
#94
20.8
#216
Coding
29.7
#73
7.4
#218
Agents
22.6
#83
18.1
#97
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.75 / M
— / M
Output price
$14.00 / M
— / M
Context window
400,000
—

Individual benchmarks

6 reported for GPT-5.3 Codex · 20 for LFM3-1.7B

No common benchmarks found

GPT-5.3 Codex 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-5.3 Codex specifies input context (400,000 tokens). Only GPT-5.3 Codex specifies output context (128,000 tokens).

OpenAI
GPT-5.3 Codex
Input400,000 tokens
Output128,000 tokens
Liquid AI
LFM3-1.7B
Input- tokens
Output- tokens
Wed Nov 04 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.3 Codex supports multimodal inputs, whereas LFM3-1.7B does not.

GPT-5.3 Codex can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.3 Codex

Text
Images
Audio
Video

LFM3-1.7B

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.3 Codex 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-5.3 Codex

Proprietary

Closed source

LFM3-1.7B

LFM Open License v1.0

Open weights

Release Timeline

When each model was launched

GPT-5.3 Codex was released on 2026-02-05, while LFM3-1.7B was released on 2026-10-27.

LFM3-1.7B is 9 months newer than GPT-5.3 Codex.

GPT-5.3 Codex

Feb 5, 2026

9 months ago

LFM3-1.7B

Oct 27, 2026

1 weeks ago

8mo 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-5.3 Codex and LFM3-1.7B side-by-side, then vote on the output you prefer.

GPT-5.3 Codex
✓ Preferred
LFM3-1.7B
Open in Playground

FAQ

Common questions about GPT-5.3 Codex vs LFM3-1.7B.

Which is better, GPT-5.3 Codex or LFM3-1.7B?

GPT-5.3 Codex leads the LLM Stats Score 36.1 to 25.0. GPT-5.3 Codex 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-5.3 Codex compare to LFM3-1.7B in benchmarks?

GPT-5.3 Codex scores SWE-Lancer (IC-Diamond subset): 81.4%, Cybersecurity CTFs: 77.6%, Terminal-Bench 2.0: 77.3%, LiveBench: 72.8%, OSWorld-Verified: 64.7%. 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-5.3 Codex and LFM3-1.7B?

GPT-5.3 Codex 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-5.3 Codex and LFM3-1.7B?

Key differences include LLM Stats Score (36.1 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-5.3 Codex and LFM3-1.7B?

GPT-5.3 Codex is developed by OpenAI and LFM3-1.7B is developed by Liquid AI.

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