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AI model rankingsLanguageK2 Horizon 375B A23B

K2 Horizon 375B A23B

Institute of Foundation Models Released September 2026

Visit Institute of Foundation Models Full benchmarks
#70 smartest of 87 #1 fastest Updated Oct 30, 2026, 01:41 PM UTC

At a glance

How K2 Horizon 375B A23B compares with the other 86 ranked language models.

  • Better for simple tasks. Ranked #70 of 87 on the overall intelligence score, ahead of 20% of models.

  • Fast writer. Writes about 563 words per second, faster than 100% of models.

  • Short wait before answering. You wait about 4.1 sec before the answer starts.

Model details

Made by
Institute of Foundation Models
Model family
K2 Horizon 375B A23B
Released
September 2026 · 8 weeks ago
Input price
$0.00 / 1M tokens
Output price
$0.00 / 1M tokens
Value for money
–
Tests with scores
6 of 8

Good for

  • Fast, live repliesWrites about 563 words per second

Not ideal for

  • Complex reasoningScores in the bottom quarter overall
  • Autonomous agentsWeak on multi-step computer tasks

Intelligence

18

overall score

#70 of 87typical 30

Coding

–

coding score

typical –

Speed

750

tokens per second

#1 of 87typical 91

Wait

4.1 sec

before it replies

#15 of 77typical 15s

Price

–

per 1M tokens

typical $2.00

Test results

Scores on individual tests that make up the intelligence score. The faint line marks the best score of any model.

  • Humanity's Last Exam

    Very hard expert questions across many subjects

    32%#66 of 84typical 43%
  • GPQA Diamond

    PhD-level biology, physics and chemistry questions

    87%#23 of 35typical 91%
  • SciCode

    Writing code to solve science research problems

    43%#74 of 84typical 54%
  • Long documents

    Finding and reasoning over facts in very long texts

    80%#41 of 85typical 80%
  • Terminal-Bench

    Doing real tasks on a computer by itself, like an agent

    2%#74 of 87typical 31%
  • Customer support

    Helping bank customers as a support agent using tools

    34%#20 of 33typical 40%

Where it ranks on intelligence

This model next to the models closest to it. Click another bar to open that model.

What would it cost?

Through the API, at the listed price. Chat apps usually charge a monthly plan instead.

  • 1,000 chat replies

    a question and a ~350-word answer, 1,000 times

    Free
  • Summarise a 100-page report

    about 50,000 words in, a one-page summary out

    Free
  • Write a 2,000-word article

    a short brief in, a long article out

    Free

Input, per 1M tokens

$0.00

Output, per 1M tokens

$0.00

How long do answers take?

Median times measured through the API.

Before the answer starts4.1 sec
Writing speed≈ 563 words / sec
A full 500-word answer5.0 sec

1 token is about ¾ of a word. Speeds change with server load, so treat these as typical, not guaranteed.

Similar models

Other companies' models with the closest intelligence score.

  • Beam 1.0

    Reflection

    18

    intelligence

    $0.60

    per 1M

    311

    tokens/s

  • Kimi K3

    KimiLow

    17

    intelligence

    $6.00

    per 1M

    0

    tokens/s

  • MiniMax-M3

    MiniMax

    19

    intelligence

    $0.53

    per 1M

    104

    tokens/s

  • Qwen3.8 27B

    AlibabaXhigh

    20

    intelligence

    $1.13

    per 1M

    39

    tokens/s

  • Nemotron 3.5 Super VL

    NVIDIA

    14

    intelligence

    $0.31

    per 1M

    410

    tokens/s

Questions people ask

Is K2 Horizon 375B A23B a good AI model?
On the overall intelligence score it ranks #70 of 87 (score 18; the typical model scores 30). It stands out for fast, live replies.
How much does K2 Horizon 375B A23B cost?
Through the API it costs $0.00 per million input tokens and $0.00 per million output tokens. In everyday terms, 1,000 chat replies cost about Free. Chat apps that use it usually charge a monthly plan instead.
How fast is K2 Horizon 375B A23B?
It writes about 563 words per second, and you wait about 4.1 sec before the answer starts. A full 500-word answer takes roughly 5.0 sec.
What are good alternatives to K2 Horizon 375B A23B?
Models with a similar score include Beam 1.0 by Reflection, Kimi K3 by Kimi, MiniMax-M3 by MiniMax.

Benchmark data from Artificial Analysis, an independent benchmarking company. Rankings refresh every few hours.