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Head-to-head comparison

Kimi K2 Thinking vs Grok 4.20 Multi-Agent

Kimi K2 Thinking (Moonshot AI) and Grok 4.20 Multi-Agent (xAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 18 August 2026

As of 18 August 2026, Grok 4.20 Multi-Agent holds the stronger ModelCap Index position (#14 vs #32); and Grok 4.20 Multi-Agent offers the longer context window (2M vs 262K tokens).

Which should you choose?

Choose Kimi K2 Thinking if…

  • your workload is prompt-heavy — input tokens cost $0.60/1M against $1.25/1M.
  • you want provider choice — 2 listed API providers against 1.

Choose Grok 4.20 Multi-Agent if…

  • you want the stronger overall ModelCap Index position — #14 against #32 (73.0 vs 58.5 points).
  • you need the longer context window — 2M tokens against 262K.
  • Arena coding is your yardstick — 1508 against 1486.
  • you want the more recently listed model — Grok 4.20 Multi-Agent was listed 31 March 2026, Kimi K2 Thinking 6 November 2025.

Kimi K2 Thinking vs Grok 4.20 Multi-Agent: specs, pricing and context

Specification comparison of Kimi K2 Thinking and Grok 4.20 Multi-Agent
FieldKimi K2 ThinkingMoonshot AIGrok 4.20 Multi-AgentxAI
ModelCap Index position#32#14
Index score58.573.0
EvidenceMeasuredMeasured
Input price / 1M tokens$0.60$1.25
Output price / 1M tokens$2.50$2.50
Context window262K tokens2M tokens
Max output tokens100K—
API providers listed21
Weight accessRestricted licenseAPI only
Input modalitiesTextText, Image, File
First listed6 November 202531 March 2026
PublisherMoonshot AIxAI

Evidence: 3 public benchmark observations across 3 boards · 2 public benchmark observations across 2 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Kimi K2 Thinking vs Grok 4.20 Multi-Agent

Public benchmark boards where Kimi K2 Thinking or Grok 4.20 Multi-Agent has a published result
BoardKimi K2 ThinkingGrok 4.20 Multi-AgentLeads
Arena codingArena (LMArena)14861481–1492Turbo15081502–1514Beta · 0309Grok 4.20 Multi-Agent
SWE-benchSWE-bench (Princeton / SWE-agent team)63.4%Thinking—Only one result
Artificial Analysis Intelligence IndexArtificial Analysis33.5intelligence-index—Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Kimi K2 Thinking vs Grok 4.20 Multi-Agent: common questions

Is Kimi K2 Thinking better than Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent ranks higher on the ModelCap Index as of 18 August 2026: #14 against #32. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Kimi K2 Thinking cheaper than Grok 4.20 Multi-Agent?

Both list the same output price, $2.50/1M tokens, with input at $0.60/1M and $1.25/1M respectively.

Which has the bigger context window, Kimi K2 Thinking or Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent has the larger context window: 2M tokens against 262K.

Which is better for coding, Kimi K2 Thinking or Grok 4.20 Multi-Agent?

Arena coding: Kimi K2 Thinking 1486, Grok 4.20 Multi-Agent 1508 — Grok 4.20 Multi-Agent leads.

Are Kimi K2 Thinking and Grok 4.20 Multi-Agent open-weight models?

Kimi K2 Thinking: Restricted license. Grok 4.20 Multi-Agent: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Kimi K2 Thinking and Grok 4.20 Multi-Agent?

ModelCap currently lists 2 API providers for Kimi K2 Thinking and 1 for Grok 4.20 Multi-Agent, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Kimi K2 Thinking vs Grok 4.20 Multi-Agent comparison?

Every figure comes from the sealed ModelCap dataset published 18 August 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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