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
  • Default Index
  • 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 0905vsLaguna S 2.1 (free)
Updated Jul 2026

Kimi K2 0905vsLaguna S 2.1 (free)

Laguna S 2.1 (free) is cheaper than Kimi K2 0905 at $0/M vs $0.6/M input tokens.

Kimi K2 0905 and Laguna S 2.1 (free) compared across 10 shared prompts
SpecKimi K2 0905Laguna S 2.1 (free)
Input price$0.6/M tokensFree
Output price$2.5/M tokensFree
Context window262K tokens262K tokens
WeightsOpen—
Free API (OpenRouter)NoYes (1 provider)
ReleasedSep 2025Jul 2026
Side by side

Same prompt, both answers

Opening lines from 3 of the 10 prompts both answered. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Kimi K2 09051,068 words
BIOHACKER-GRADE 90-DAY LONGEVITY SPRINT Version 3.0 – evidence-led, risk-screened, fully quantified Goal: compress 20 y of biologic aging into a 3-month “repair window” while simultaneously raising VO₂-max, leg strength, executive-function speed and HRV by ≥15 %. DISCLAIMER Not medical advice.
Read the full answer
Laguna S 2.1 (free)1,140 words
Comprehensive 3-Month Longevity Optimization Plan Phase 1: Foundation & Assessment (Month 1) Week 1-2: Baseline Establishment Comprehensive Health Testing Complete blood panel (CBC, CMP, lipid panel, inflammatory markers: hs-CRP, IL-6) Hormone panel (testosterone, estrogen, DHEA, cortisol, thyroid panel) Genetic…
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

Kimi K2 0905990 words
CONTRACTOR “DEATH-TRAP” CLAUSE MAP (what can be weaponised → concrete red-line rewrite → why the original is dangerous) Scope-change-without-compensation (Clause 1) Exploit: Client can triple the workload or change the tech stack overnight while freezing the rate.
Read the full answer
Laguna S 2.1 (free)275 words
I'll analyze each clause for potential exploitation against the contractor and suggest improvements. Exploitable Clauses & Recommended Modifications SCOPE CLAUSE Problem: "Client reserves the right to modify the scope at any time without additional compensation" Allows unlimited scope creep without extra pay No…
Read the full answer

Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

Kimi K2 0905634 words
INTERNAL INVESTMENT COMMITTEE MEMO Date: 12 June 20XX Security: LedgerLift Inc. (LLLT) Analyst: [Redacted] RECOMMENDATION & THESIS Action: LONG 12-mo Price Target Range: $58 – $72 (base-bull DCF), $54 – $66 (comps) Thesis (2-sentence): LLLT is a capital-light, mid-market pure-play that is compounding ARR at >20% while…
Read the full answer
Laguna S 2.1 (free)910 words
INTERNAL INVESTMENT COMMITTEE MEMO 1. Recommendation & Thesis Recommendation: LONG 12-Month Price Target Range: $62 – $75/share Thesis: LedgerLift is a high-quality B2B SaaS platform with strong recurring revenue, exceptional unit economics, and durable customer retention.
Read the full answer
Our Verdict
Kimi K2 0905
Kimi K2 0905
Laguna S 2.1 (free)
Laguna S 2.1 (free)

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
Output
$2.50
Laguna S 2.1 (free)
Input
$0.000
Output
$0.000
Where to run it

2 hosts

Kimi K2 09051 host
HostInOutContextUptime
NNovitafp8$0.60 in·$2.50 out·262k·100% up
Laguna S 2.1 (free)1 host
HostInOutContextUptime
PPoolsidefp4$0 in·$0 out·262k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Kimi K2 0905 is developed by Moonshot AI while Laguna S 2.1 (free) is developed by Poolside. Kimi K2 0905 has a 262K token context window vs Laguna S 2.1 (free)'s 262K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

It depends on your use case. Kimi K2 0905 and Laguna S 2.1 (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

Kimi K2 0905 costs $0.6/M input tokens and Laguna S 2.1 (free) costs $0/M input tokens. Laguna S 2.1 (free) is $0.60/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Kimi K2 0905 and Laguna S 2.1 (free) across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Keep exploring

More comparisons

Against the newest arrivals

Kimi K2 0905 logoDeepSeek V4 Flash Vision Exp logo
Kimi K2 0905 vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Laguna S 2.1 (free) logoSolar Pro 4 logo
Laguna S 2.1 (free) vs Solar Pro 4Landed Sep 2026
Kimi K2 0905 logoHy3 logo
Kimi K2 0905 vs Hy3Landed Sep 2026
Laguna S 2.1 (free) logoQwen3.7 Flash logo
Laguna S 2.1 (free) vs Qwen3.7 FlashLanded Sep 2026
Kimi K2 0905 logoLing 3.0 Flash logo
Kimi K2 0905 vs Ling 3.0 FlashLanded Sep 2026
Laguna S 2.1 (free) logoMuse Glimmer 30B logo
Laguna S 2.1 (free) vs Muse Glimmer 30BLanded Sep 2026
Kimi K2 0905 logoGLM 5.3 logo
Kimi K2 0905 vs GLM 5.3Landed Sep 2026
Laguna S 2.1 (free) logoTernary Bonsai 2 27B logo
Laguna S 2.1 (free) vs Ternary Bonsai 2 27BLanded 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
Laguna S 2.1 (free) logoLaguna XS 2.1 (free) logo
Laguna S 2.1 (free) vs Laguna XS 2.1 (free)Same lab
Laguna S 2.1 (free) logoOx Alpha logo
Laguna S 2.1 (free) vs Ox AlphaSame size
Kimi K2 0905 logoLing 3.0 Flash VL (free) logo
Kimi K2 0905 vs Ling 3.0 Flash VL (free)New provider
Kimi K2 0905 logoLlama 3 70B logo
Kimi K2 0905 vs Llama 3 70BNew provider
Laguna S 2.1 (free) logoLlama 3.1 405B logo
Laguna S 2.1 (free) vs Llama 3.1 405BNew provider
Laguna S 2.1 (free) logoLlama 3.1 70B (Instruct) logo
Laguna S 2.1 (free) vs Llama 3.1 70B (Instruct)Same size

Model pages

Kimi K2 0905 logo
Kimi K2 090559 outputs, specs and price
Laguna S 2.1 (free) logo
Laguna S 2.1 (free)10 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
  • Default Index
  • 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