Model Comparison

Grok 4.5 vs MedGemma 4B ITWhich is better in 2026?

Comparing Grok 4.5 and MedGemma 4B IT across benchmarks, pricing, and capabilities.

Verdict: Grok 4.5 vs MedGemma 4B IT — which is better?

Grok 4.5 (by xAI) and MedGemma 4B IT (by Google) 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 Grok 4.5 if…

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

Choose MedGemma 4B IT if…

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

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok 4.5 and MedGemma 4B ITdon'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 Grok 4.5 specifies input context (500,000 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Google
MedGemma 4B IT
Input- tokens
Output- tokens
Sat Jul 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok 4.5 and MedGemma 4B IT support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Grok 4.5

Text
Images
Audio
Video

MedGemma 4B IT

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.5 is licensed under a proprietary license, while MedGemma 4B IT uses Health AI Developer Foundations terms of use.

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

Grok 4.5

Proprietary

Closed source

MedGemma 4B IT

Health AI Developer Foundations terms of use

Open weights

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-16, while MedGemma 4B IT was released on 2025-05-20.

Grok 4.5 is 14 months newer than MedGemma 4B IT.

Grok 4.5

Jul 16, 2026

1 weeks ago

1.2yr newer
MedGemma 4B IT

May 20, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

Grok 4.5 has a documented knowledge cutoff of 2026-02-01, while MedGemma 4B IT's cutoff date is not specified.

We can confirm Grok 4.5's training data extends to 2026-02-01, but cannot make a direct comparison without MedGemma 4B IT's cutoff date.

Grok 4.5

Feb 2026

MedGemma 4B IT

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (500,000 tokens)
Google
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok 4.5 and MedGemma 4B IT side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
MedGemma 4B IT
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
Google
MedGemma 4B IT

FAQ

Common questions about Grok 4.5 vs MedGemma 4B IT.

Which is better, Grok 4.5 or MedGemma 4B IT?

Grok 4.5 (xAI) and MedGemma 4B IT (Google) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok 4.5 compare to MedGemma 4B IT in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%. MedGemma 4B IT scores MIMIC CXR: 88.9%, DermMCQA: 71.8%, PathMCQA: 69.8%, SlakeVQA: 62.3%, VQA-Rad: 49.9%.

What are the context window sizes for Grok 4.5 and MedGemma 4B IT?

Grok 4.5 supports 500K tokens and MedGemma 4B IT 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 Grok 4.5 and MedGemma 4B IT?

Key differences include licensing (Proprietary vs Health AI Developer Foundations terms of use). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.5 and MedGemma 4B IT?

Grok 4.5 is developed by xAI and MedGemma 4B IT is developed by Google.

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