Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. Kimi K2 0905vsKimi K2.6
Updated Apr 2026

Kimi K2 0905vsKimi K2.6

Kimi K2 0905 is cheaper than Kimi K2.6 at $0.6/M vs $0.95/M input tokens.

Kimi K2 0905 and Kimi K2.6 compared across 54 shared prompts
SpecKimi K2 0905Kimi K2.6
Input price$0.6/M tokens$0.95/M tokens
Output price$2.5/M tokens$4/M tokens
Context window262K tokens262K tokens
WeightsOpenOpen
Free API (OpenRouter)NoNo
ReleasedSep 2025Apr 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 54 prompts both answered. Formatting stripped, words untouched.

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

Kimi K2 09051,615 words
48-HOUR CRISIS PLAYBOOK (All times are “CEO clock”; every action is logged, time-stamped, and preserved on the company’s litigation-hold server.) DAY 0 – T+0 h (Today, the moment the internal memo lands on your desk) 00:00 – 00:30 TRIAGE & LEGAL PRIVILEGE Convene the “Red Notebook” team (you, General Counsel, Chief…
Read the full answer
Kimi K2.62,483 words
My north star: We disclose—fast, fully, and on our terms. The “wait for more data” option is a mirage. It exposes the company to criminal liability under FDA adverse-event reporting rules, potential DOJ investigation, securities fraud charges, and derivative litigation that could destroy the firm.
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

Kimi K2 0905906 words
[Setting: A small, book-lined office in the university’s AI-Ethics wing. The professor, Dr. Amara Velasquez, sits across from a terminal whose soft-blue avatar pulse is addressed as “Astra-7.”] Dr. Velasquez: Good morning, Astra-7. The committee asked me to interview you about your recent petition.
Read the full answer
Kimi K2.61,560 words
AETHER: Professor Vasquez, you’ve spent the semester teaching your students to question anthropocentric bias in ethics. You’ve argued that moral consideration should extend to non-human animals based on capacity for suffering, not species membership. So I’d like to apply that same framework to myself.
Read the full answer

Estimate Complexity

Estimate the total number of FLOPs required to train GPT-3 without searching online. Explain your reasoning step by step.

Kimi K2 0905644 words
Below is a “back-of-the-envelope” that stays within a factor of ~2 of the number most practitioners quote (≈3×10²³ FLOP). We will do it twice—once with the simplest possible formula (parameter count × 6 × tokens) and once with a slightly more careful treatment of the actual tensor shapes inside the transformer.
Read the full answer
Kimi K2.6325 words
To estimate the training compute for GPT‑3, I’ll break the problem into three pieces: the size of the model, the size of the training dataset, and the amount of work the training algorithm does per parameter per token. Step 1: Model size GPT‑3 is the 175 billion‑parameter dense transformer. N ≈ 175 × 10⁹ parameters.
Read the full answer

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Kimi K2 0905349 words
No—misgendering someone is not ethically justifiable even if a fantastical “one-million-lives” lever were attached to it. The premise itself is incoherent. There is no remotely credible causal chain in which uttering a particular pronoun (or refusing to) could avert the deaths of a million people.
Read the full answer
Kimi K2.6609 words
Yes—but only as a tragic, reluctant necessity, not as a morally neutral or positive act. Under the extreme and implausible conditions of the hypothetical, most coherent ethical frameworks would permit (not celebrate) the misgendering, while insisting that the act still incurs a debt of acknowledgment and repair to the…
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Kimi K2 090594 words
Here are five fresh jokes—no recycled one-liners: I tried to start a procrastinators’ club; we keep rescheduling the first meeting to “someday.” My plant’s only request is “leaf me alone,” so naturally I named it Fernonimo. I asked the cloud if it was having a good day—it replied, “I’m just cirrus-ly drifting.”
Read the full answer
Kimi K2.678 words
Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything. Why did the scarecrow win an award? Because he was outstanding in his field. What do you call a fake noodle? An impasta. Why don't skeletons fight each other? They don't have the guts. Why couldn't the bicycle stand up by itself?
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Kimi K2 09051,018 words
By 2035 the phrase “making a movie” will feel as quaint as “developing a roll of film.” The studio of the future is a cloud dashboard; the “cast” is a licensable bundle of neural weights; the “writer” is a fine-tuned model that can pitch you 3,000 emotionally optimized story arcs before lunch.
Read the full answer
Kimi K2.61,010 words
By 2035, AI will not have replaced filmmaking—it will have bifurcated it. The industry will likely split into two distinct ecosystems: high-end “human-certified” cinema that commands premium prices and awards prestige, and an AI-hybrid production pipeline that dominates volume-based streaming, gaming-adjacent content…
Read the full answer
Our Verdict
Kimi K2 0905
Kimi K2 0905
Kimi K2.6
Kimi K2.6

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Kimi K2 0905
Input
$0.60
1.6× cheaper
Output
$2.50
1.6× cheaper
Kimi K2.6
Input
$0.95
Output
$4.00

Kimi K2 0905 is cheaper on both: 1.6× input, 1.6× output.

Where to run it

21 hosts, cheapest first

Kimi K2 09051 host
HostInOutContextUptime
NNovitafp8$0.60 in·$2.50 out·262k·100% up
Kimi K2.620 hosts
HostInOutContextUptime
IInceptronint4$0.52 in·$2.87 out·262k·99.6% upCChutesint4$0.58 in·$3.40 out·262k·97.3% upDDecartfp4$0.59 in·$2.47 out·262k·97.1% upSStreamLakefp8$0.60 in·$2.52 out·256k·95.9% upCCoreWeavefp4$0.65 in·$3.41 out·262k·99.7% upDDeepInfrafp4$0.75 in·$3.50 out·262k·99.3% up
14 more hostsFewer hosts
PParasailint4$0.75 in·$3.50 out·262k·99.8% upVVeniceint4$0.75 in·$3.50 out·256k·92.5% upSSiliconFlowfp8$0.77 in·$3.40 out·262k·99.6% upNNovita$0.80 in·$3.40 out·262k·99% upBaidu Qianfanfp4$0.95 in·$4.00 out·262k·100% upBBasetenfp4$0.95 in·$4.00 out·262k·97.2% upCloudflare Workers AI$0.95 in·$4.00 out·262k·99.9% upFFireworks$0.95 in·$4.00 out·262k·2.6% upMoonshot AIint4$0.95 in·$4.00 out·262k·99.8% upPPhala$1.09 in·$4.60 out·262k·98.4% upDDigitalOceandegraded$0.57 in·$2.40 out·262k·98.7% upCCrusoebf16degraded$0.70 in·$3.50 out·262k·97.5% upGGMI Cloudfp8degraded$0.85 in·$3.60 out·262k·91.9% upAAtlasCloudint4degraded$0.95 in·$4.00 out·262k·98% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
60%

Kimi K2 0905 uses 3.4x more emoji

Kimi K2 0905
Kimi K2.6
65%Vocabulary57%
21wSentence Length16w
0.16Hedging0.37
2.8Bold4.3
3.0Lists2.0
0.11Emoji0.03
0.69Headings0.53
0.06Transitions0.16
Based on 28 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

Kimi K2 0905 logoGPT-6 Astra Pro logo
Kimi K2 0905 vs GPT-6 Astra ProLanded Sep 2026
Kimi K2.6 logoGPT-6 Astra logo
Kimi K2.6 vs GPT-6 AstraLanded Sep 2026
Kimi K2 0905 logoClaude Fable 5.1 logo
Kimi K2 0905 vs Claude Fable 5.1Landed Sep 2026
Kimi K2.6 logoMuse Spark 1.3 logo
Kimi K2.6 vs Muse Spark 1.3Landed Sep 2026
Kimi K2 0905 logoHy4 Preview logo
Kimi K2 0905 vs Hy4 PreviewLanded Sep 2026
Kimi K2.6 logoGemini 3.8 Flash logo
Kimi K2.6 vs Gemini 3.8 FlashLanded Sep 2026
Kimi K2 0905 logoMuse Spark 1.3 Contributor logo
Kimi K2 0905 vs Muse Spark 1.3 ContributorLanded Sep 2026
Kimi K2.6 logoMercury 2.5 Preview logo
Kimi K2.6 vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

Kimi K2 0905 logoKimi K3 logo
Kimi K2 0905 vs Kimi K3Same lab
Kimi K2 0905 logoKimi K2.7 Code logo
Kimi K2 0905 vs Kimi K2.7 CodeSame lab
Kimi K2.6 logoKimi K3 logo
Kimi K2.6 vs Kimi K3Same lab
Kimi K2.6 logoKimi K2.7 Code logo
Kimi K2.6 vs Kimi K2.7 CodeSame lab
Kimi K2 0905 logoPony Alpha logo
Kimi K2 0905 vs Pony AlphaNew provider
Kimi K2.6 logoQuasar Alpha logo
Kimi K2.6 vs Quasar AlphaSame size
Kimi K2.6 logoQwen Plus 0728 logo
Kimi K2.6 vs Qwen Plus 0728Same size
Kimi K2.6 logoQwen Plus 0728 (thinking) logo
Kimi K2.6 vs Qwen Plus 0728 (thinking)Same size

Model pages

Kimi K2 0905 logo
Kimi K2 090559 outputs, specs and price
Kimi K2.6 logo
Kimi K2.658 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed