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Gemini 4 Carbon vs K2 Horizon 0.9B

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 0.5.

Google · Institute of Foundation Models · Updated for 2026

Which is better?

Gemini 4 Carbon leads the overall LLM Stats Score 59.0 to 0.5, ranking #2 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 4 Carbon

  • overall performance matters — it scores 59.0 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you want the most recent training data — it shipped Oct 2026

Choose K2 Horizon 0.9B

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

At a glance

The differences that matter most.

Gemini 4 Carbon
Google
K2 Horizon 0.9B
Institute of Foundation Models
Core performance indexes
LLM Stats Score
59.0
#2
0.5
#358
Reasoning
54.9
#5
0.6
#350
Agents
46.0
#2
-5.3
#218
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Individual benchmarks

16 reported for Gemini 4 Carbon · 8 for K2 Horizon 0.9B

No common benchmarks found

Gemini 4 Carbon and K2 Horizon 0.9Bdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Input capabilities

Documented input modalities across available providers

Gemini 4 Carbon supports multimodal inputs, whereas K2 Horizon 0.9B does not.

Gemini 4 Carbon can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 4 Carbon

Text
Images
Audio
Video

K2 Horizon 0.9B

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 4 Carbon is licensed under a proprietary license, while K2 Horizon 0.9B uses Apache 2.0.

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

Gemini 4 Carbon

Proprietary

Closed source

K2 Horizon 0.9B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Gemini 4 Carbon was released on 2026-10-28, while K2 Horizon 0.9B was released on 2026-09-03.

Gemini 4 Carbon is 2 months newer than K2 Horizon 0.9B.

Gemini 4 Carbon

Oct 28, 2026

-1 days ago

1mo newer
K2 Horizon 0.9B

Sep 3, 2026

1 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Gemini 4 Carbon and K2 Horizon 0.9B side-by-side, then vote on the output you prefer.

Gemini 4 Carbon
✓ Preferred
K2 Horizon 0.9B
Open in Playground

FAQ

Common questions about Gemini 4 Carbon vs K2 Horizon 0.9B.

Which is better, Gemini 4 Carbon or K2 Horizon 0.9B?

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 0.5. Gemini 4 Carbon is made by Google and K2 Horizon 0.9B is made by Institute of Foundation Models. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 4 Carbon compare to K2 Horizon 0.9B in benchmarks?

Gemini 4 Carbon scores Gray Swan IPI Benchmark: 100.0%, Vending-Bench 2: 100.0%, Graphwalks BFS >128k: 96.2%, WebDev Arena: 88.4%, SEC-bench Pro: 88.2%. K2 Horizon 0.9B scores HumanEval+: 79.9%, MBPP+: 68.0%, AIME 2026: 48.5%, AIME 2025: 41.7%, LiveCodeBench v6: 37.4%.

What are the main differences between Gemini 4 Carbon and K2 Horizon 0.9B?

Key differences include LLM Stats Score (59.0 vs 0.5), multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 4 Carbon and K2 Horizon 0.9B?

Gemini 4 Carbon is developed by Google and K2 Horizon 0.9B is developed by Institute of Foundation Models.

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