Model Comparison

GPT-5.6 Luna vs IBM Granite 4.0 Tiny PreviewWhich is better in 2026?

Comparing GPT-5.6 Luna and IBM Granite 4.0 Tiny Preview across benchmarks, pricing, and capabilities.

Verdict: GPT-5.6 Luna vs IBM Granite 4.0 Tiny Preview — which is better?

GPT-5.6 Luna (by OpenAI) and IBM Granite 4.0 Tiny Preview (by IBM) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Choose GPT-5.6 Luna if…

  • you want the most recent training data — it shipped Jul 2026

Choose IBM Granite 4.0 Tiny Preview if…

  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.6 Luna and IBM Granite 4.0 Tiny Previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-5.6 Luna specifies input context (1,050,000 tokens). Only GPT-5.6 Luna specifies output context (128,000 tokens).

OpenAI
GPT-5.6 Luna
Input1,050,000 tokens
Output128,000 tokens
IBM
IBM Granite 4.0 Tiny Preview
Input- tokens
Output- tokens
Sun Jul 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.6 Luna supports multimodal inputs, whereas IBM Granite 4.0 Tiny Preview does not.

GPT-5.6 Luna can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.6 Luna

Text
Images
Audio
Video

IBM Granite 4.0 Tiny Preview

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.6 Luna is licensed under a proprietary license, while IBM Granite 4.0 Tiny Preview uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

GPT-5.6 Luna

Proprietary

Closed source

IBM Granite 4.0 Tiny Preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

GPT-5.6 Luna was released on 2026-07-09, while IBM Granite 4.0 Tiny Preview was released on 2025-05-02.

GPT-5.6 Luna is 14 months newer than IBM Granite 4.0 Tiny Preview.

GPT-5.6 Luna

Jul 9, 2026

1 weeks ago

1.2yr newer
IBM Granite 4.0 Tiny Preview

May 2, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

GPT-5.6 Luna has a documented knowledge cutoff of 2026-02-16, while IBM Granite 4.0 Tiny Preview's cutoff date is not specified.

We can confirm GPT-5.6 Luna's training data extends to 2026-02-16, but cannot make a direct comparison without IBM Granite 4.0 Tiny Preview's cutoff date.

GPT-5.6 Luna

Feb 2026

IBM Granite 4.0 Tiny Preview

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
Supports multimodal inputs
IBM
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.6 Luna and IBM Granite 4.0 Tiny Preview side-by-side, then vote on the output you prefer.

GPT-5.6 Luna
✓ Preferred
IBM Granite 4.0 Tiny Preview
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.6 Luna
IBM
IBM Granite 4.0 Tiny Preview

FAQ

Common questions about GPT-5.6 Luna vs IBM Granite 4.0 Tiny Preview.

Which is better, GPT-5.6 Luna or IBM Granite 4.0 Tiny Preview?

GPT-5.6 Luna (OpenAI) and IBM Granite 4.0 Tiny Preview (IBM) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.6 Luna compare to IBM Granite 4.0 Tiny Preview in benchmarks?

GPT-5.6 Luna scores Connectors: 99.9%, HealthBench Consensus: 95.1%, GPQA: 92.3%, Search and Function-Calling: 89.7%, Capture-the-Flag Challenges (Internal): 85.2%. IBM Granite 4.0 Tiny Preview scores AttaQ: 86.1%, HumanEval: 82.4%, HumanEval+: 78.3%, GSM8k: 70.1%, IFEval: 63.0%.

What are the context window sizes for GPT-5.6 Luna and IBM Granite 4.0 Tiny Preview?

GPT-5.6 Luna supports 1.1M tokens and IBM Granite 4.0 Tiny Preview 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-5.6 Luna and IBM Granite 4.0 Tiny Preview?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.6 Luna and IBM Granite 4.0 Tiny Preview?

GPT-5.6 Luna is developed by OpenAI and IBM Granite 4.0 Tiny Preview is developed by IBM.

Related comparisons