GPT-5.6 Sol vs IBM Granite 4.2 30B
GPT-5.6 Sol leads the LLM Stats Score 56.6 to 24.0.
OpenAI · IBM · Updated for 2026
Which is better?
GPT-5.6 Sol leads the overall LLM Stats Score 56.6 to 24.0, ranking #1 overall.
In the 3 individual benchmarks reported for both models, GPT-5.6 Sol 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-5.6 Sol
- overall performance matters — it scores 56.6 and ranks #1 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 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.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
44 reported for GPT-5.6 Sol · 18 for IBM Granite 4.2 30B
GPT-5.6 Sol outperforms in 3 benchmarks (GPQA, SWE-Bench Pro, Terminal-Bench 2.1), while IBM Granite 4.2 30B is better at 0 benchmarks.
GPT-5.6 Sol 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-5.6 Sol specifies input context (1,050,000 tokens). Only GPT-5.6 Sol specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.6 Sol supports multimodal inputs, whereas IBM Granite 4.2 30B does not.
GPT-5.6 Sol can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.6 Sol
IBM Granite 4.2 30B
License
Usage and distribution terms
GPT-5.6 Sol 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-5.6 Sol was released on 2026-07-09, while IBM Granite 4.2 30B was released on 2026-08-25.
IBM Granite 4.2 30B is 2 months newer than GPT-5.6 Sol.
Jul 9, 2026
1 months ago
Aug 25, 2026
1 weeks ago
1mo newerKnowledge Cutoff
When training data ends
GPT-5.6 Sol has a documented knowledge cutoff of 2026-02-16, while IBM Granite 4.2 30B's cutoff date is not specified.
We can confirm GPT-5.6 Sol's training data extends to 2026-02-16, but cannot make a direct comparison without IBM Granite 4.2 30B's cutoff date.
Feb 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.6 Sol and IBM Granite 4.2 30B side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.6 Sol vs IBM Granite 4.2 30B.