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K2 Horizon 3.7B

Sep 2026
IK2 Horizon 3.7B
Compare in
on
—per task?
$0.30 / $1.20per 1M in / out?
—output speed?
524Kcontext

Rankingin thinking mode?

Strong at

B
Agents & work tasks#82 of 177Reasoning#151 of 336Long context#152 of 314Knowledge#148 of 320
C
Coding#77 of 134Science#188 of 312

Alternatives?

ModelScoreCostPer taskWhat changes
CheaperLing 3.1 Flash 1019+26-14%$1.49BetterGPT-6 Lunalow+2.6-62%$0.005Function calling only with none · Chat Completions+3OpenQwen 3.5 9Bnon-thinkingsame-82%$0.08 / $0.13Context: 524K → 262K+1CheaperClaude Haiku 5.5xhigh+22.6-62%$0.12Remove sampling parameters+5CheaperMiniMax M3.1 Flashthinking+22.3-50%$0.22No strict JSON+1

Run it yourself

estimate
Fits on✓ 8 GB (phone, laptop) · 8-bit✓ 16 GB · full quality✓ 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 Exam13.9#152
AA Omniscience Index-28.6#149
CritPt (physics)0#182
AA Intelligence Index 4.3.215.6#142
AA Omniscience · Accuracy10.8#280
AA Omniscience · Hallucination Rate44.1#74
AA-LCR (long context) 1.162.3#153
GDP.pdf · AA all-pass3.2#101
GPQA Diamond69.2#190
Coding
Terminal-Bench 4.00#77
SciCode22#135
Terminal-Bench 2.128.1#100
Agents & Tool Use
AutomationBench-AA14.7#71
GDPval-AA (work tasks) 2.1881.1#82
τ³-Banking · AA19.6#58
AA-Briefcase 1.1 · Elo792.1#79

FAQ

How much does K2 Horizon 3.7B cost?›

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

Is K2 Horizon 3.7B 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 3.7B, and what is it best at?›

#151 of 336 in Chat & Knowledge, #77 of 134 in Coding, #71 of 135 in Agents & Tool Use, #101 of 135 in Vision & Documents.

Is K2 Horizon 3.7B better than K2 Horizon 0.9B?›

On CritPt (physics), K2 Horizon 3.7B scores 0 vs 0 — about the same.

How can I use K2 Horizon 3.7B?›

Through the API of Featherless.

What is the context window of K2 Horizon 3.7B?›

524K tokens.

When was K2 Horizon 3.7B released? Is there a newer version?›

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

Is K2 Horizon 3.7B open source?›

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

Can I run K2 Horizon 3.7B locally?›

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

Can K2 Horizon 3.7B read images?›

No, it accepts text only.

What is K2 Horizon 3.7B?›

K2 Horizon 3.7B is an open-weights language model from Institute of Foundation Models, released Sep 2026.

What are the best alternatives to K2 Horizon 3.7B?›

Ling 3.1 Flash 1019 (cheaper), GPT-6 Luna (better), Qwen 3.5 9B (open weights).