# IBM's Granite 4.2 30B adds reasoning and tool calls

> The new dense model brings optional step-by-step thinking and function calling under a permissive Apache-2.0 license.

Published by The Open Weights on Aug 7, 2026. Canonical: https://theopenweights.com/news/granite-4-2-30b-9jv3

## Key facts

- Company: IBM
- Model: Granite 4.2 30B
- Version: 4.2-30B
- Category: Text / LLM
- Modalities: Text / LLM, Reasoning
- License: Apache 2.0 (Open weights, commercial use allowed)
- Parameters: 30B
- Context window: 131K tokens
- Architecture: GraniteForCausalLM
- Precision: BF16
- Weights size: 58.6 GB
- Significance: notable
- Published: 2026-08-07
- Last verified: 2026-09-02
- Hugging Face: https://huggingface.co/ibm-granite/granite-4.2-30b
- Canonical URL: https://theopenweights.com/news/granite-4-2-30b-9jv3

IBM has published Granite 4.2 30B, the latest addition to its Granite line of open language models. The release, [available on Hugging Face](https://huggingface.co/ibm-granite/granite-4.2-30b), is a dense 30-billion-parameter model that ships with support for reasoning-style "thinking" and tool calling, and it carries the permissive Apache-2.0 license.

The combination is notable for teams building agentic systems. Optional reasoning modes let a model work through problems in intermediate steps before answering, while native tool calling makes it easier to wire the model into external functions, APIs, and retrieval pipelines without heavy prompt engineering.

## Why it matters

IBM has positioned Granite as an enterprise-friendly, openly licensed alternative to closed frontier models, and the 30B size sits in a practical middle ground:

- Large enough to handle structured reasoning and multi-step tasks
- Small enough to be deployed on more modest hardware than the largest open models
- Apache-2.0 licensing that permits commercial use and fine-tuning with minimal restrictions

For developers already invested in the Granite ecosystem, the arrival of reasoning and tool-calling capabilities in a dense model broadens the range of applications the family can serve. As always, real-world evaluation on your own workloads is the best gauge of whether it fits; the model card on Hugging Face is the authoritative source for configuration and usage details.

## Get the model

- [Hugging Face](https://huggingface.co/ibm-granite/granite-4.2-30b)

## Sources

- [ibm-granite/granite-4.2-30b](https://huggingface.co/ibm-granite/granite-4.2-30b) — Hugging Face, Aug 7, 2026

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "IBM's Granite 4.2 30B adds reasoning and tool calls", The Open Weights, Aug 7, 2026, https://theopenweights.com/news/granite-4-2-30b-9jv3