Granite 4.1 8B
Granite 4.1 8B by IBM is a dense, decoder-only open-source model with 512K context, four-stage RL alignment, and tool calling for enterprise automation.
Model Overview
Capabilities, design details, and architectural traits
Granite 4.1 8B - Dense Decoder-Only Enterprise Language Model
Granite 4.1 8B is IBM's balanced-tier open-source language model, part of the Granite 4.1 family. It uses a dense, decoder-only transformer architecture - deliberately avoiding sparse MoE routing - to deliver predictable latency and stable token usage for enterprise workloads. IBM documents the 8B instruct variant as consistently matching or outperforming the previous-generation Granite 4.0-H-Small.
Architecture
Granite-4.1-8B is built on a dense decoder-only transformer with: GQA (Grouped Query Attention), RoPE positional embeddings, MLP with SwiGLU activation, RMSNorm, and shared input/output embeddings. No sparse routing, no MoE layers.
Benchmark Performance
Independent evaluations · Artificial Analysis
Accuracy & Capability Details
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| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | IBM | Anthropic | Anthropic |
| Release Date | April 29, 2026 | September 22, 2026 | September 28, 2026 |
| Knowledge Cutoff | - | - | Jun 2026 |
| Context & Limits | |||
| Context Window | 524K | 1M Best Context Window | 1M Best Context Window |
| Pricing (per 1M tokens) | |||
| Input Pricing | $0.05 Best Input Pricing | $4 | $2 |
| Output Pricing | $0.10 Best Output Pricing | $20 | $10 |
| Modalities | |||
| Inputs | text | textimagefile | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 6.6 | 57.6 Best Intelligence Index | 56.0 |
| Coding Index | 9.5 | - | - |
| Agentic Index | - | - | - |
Humanity's Last Exam
Extremely difficult logical reasoning and knowledge.
Long Context Reasoning
Logical reasoning over long context windows.
SciCode Benchmark
Scientific coding and mathematical modeling.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
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