GPT-5.3 Codex vs IBM Granite 4.2 30B
GPT-5.3 Codex leads the LLM Stats Score 36.8 to 24.0.
OpenAI · IBM · Updated for 2026
Which is better?
GPT-5.3 Codex leads the overall LLM Stats Score 36.8 to 24.0, ranking #66 overall.
In the 1 individual benchmarks reported for both models, GPT-5.3 Codex 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-5.3 Codex
- overall performance matters — it scores 36.8 and ranks #66 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
Choose IBM Granite 4.2 30B
- you want the most recent training data — it shipped Aug 2026
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
6 reported for GPT-5.3 Codex · 18 for IBM Granite 4.2 30B
GPT-5.3 Codex outperforms in 1 benchmarks (SWE-Bench Pro), while IBM Granite 4.2 30B is better at 0 benchmarks.
GPT-5.3 Codex 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-5.3 Codex specifies input context (400,000 tokens). Only GPT-5.3 Codex specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.3 Codex supports multimodal inputs, whereas IBM Granite 4.2 30B 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
IBM Granite 4.2 30B
License
Usage and distribution terms
GPT-5.3 Codex is licensed under a proprietary license, while IBM Granite 4.2 30B uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Apache 2.0
Open weights
Release Timeline
When each model was launched
GPT-5.3 Codex was released on 2026-02-05, while IBM Granite 4.2 30B was released on 2026-08-25.
IBM Granite 4.2 30B is 7 months newer than GPT-5.3 Codex.
Feb 5, 2026
6 months ago
Aug 25, 2026
6 days ago
6mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.3 Codex and IBM Granite 4.2 30B side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.3 Codex vs IBM Granite 4.2 30B.