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K2 Horizon 7B

Sep 2026
IK2 Horizon 7B
Compare in
on
—per task?
$0.30 / $1.20per 1M in / out?
—output speed?
524Kcontext

Rankingin thinking mode?

Strong at

B
Coding#54 of 132Agents & work tasks#74 of 175Reasoning#131 of 334Science#151 of 312Long context#126 of 273Knowledge#112 of 318

Alternatives?

ModelScoreCostPer taskWhat changes
CheaperClaude Haiku 5.5max×2.1-62%$0.21Remove sampling parameters+5BetterGPT-5.6 Lunamedium+22%-14%$0.016IOpenK2 Horizon 3.7Bthinking-24%same$0.30 / $1.20CheaperMiniMax M3.1 Flashthinking×2.1-50%$0.22Complete model response must be appendedCheaperGLM 5.3 FlashmaxOpen×2-55%$0.28Memory (4-bit): 4.5 GB → 193 GB+5

Run it yourself

estimate
Fits on✓ 8 GB (phone, laptop) · compressed✓ 16 GB · 8-bit✓ 24 GB GPU · full quality✓ 48 GB GPU · full quality✓ 80 GB GPU · full quality
LicenceApache-2.0free for commercial use

Benchmarks

all categories
Chat & Knowledge
Humanity's Last Exam18.2#131
AA Omniscience Index-16.6#113
CritPt (physics)0.3#149
AA Intelligence Index 4.3.220.6#118
AA Omniscience · Accuracy12.8#261
AA Omniscience · Hallucination Rate33.6#47
AA-LCR (long context) 1.169.7#126
GDP.pdf · AA all-pass3.2#99
GPQA Diamond75.3#152
Coding
Terminal-Bench 4.01#54
SciCode27.5#126
Terminal-Bench 2.144.2#78
Agents & Tool Use
AutomationBench-AA20.9#59
GDPval-AA (work tasks) 2.126.2#74
τ³-Banking · AA27.6#38
AA-Briefcase 1.1 · Elo1,015.6#52

FAQ

How much does K2 Horizon 7B cost?›

$0.30 per 1M input tokens and $1.20 per 1M output tokens (cheapest host: Featherless).

Is K2 Horizon 7B free to use?›

There is no free API; the cheapest paid price is $0.30 per 1M input tokens. The weights are open, so you can run it yourself.

How good is K2 Horizon 7B, and what is it best at?›

#131 of 334 in Chat & Knowledge, #54 of 132 in Coding, #59 of 133 in Agents & Tool Use, #99 of 133 in Vision & Documents.

Is K2 Horizon 7B better than GPT-5 Mini?›

On AA Intelligence Index 4.3.2, K2 Horizon 7B scores 20.6 vs 20.6 — about the same.

How can I use K2 Horizon 7B?›

Through the API of Featherless.

What is the context window of K2 Horizon 7B?›

524K tokens.

When was K2 Horizon 7B released? Is there a newer version?›

Released 2026-09-03. It is the current version in its line.

Is K2 Horizon 7B open source?›

Yes, the weights are open (Apache-2.0 licence).

Can I run K2 Horizon 7B locally?›

The weights are open and can be self-hosted; hardware needs are not confirmed yet.

Can K2 Horizon 7B read images?›

No, it accepts text only.

What is K2 Horizon 7B?›

K2 Horizon 7B is an open-weights language model from Institute of Foundation Models, released Sep 2026.

What are the best alternatives to K2 Horizon 7B?›

Claude Haiku 5.5 (cheaper), GPT-5.6 Luna (better), K2 Horizon 3.7B (open weights).