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Comparison · 2 models · Updated Oct 4, 2026

Grok 4.20 Multi-Agent vs Kimi K2.6

Too close to call on our weighted score (Kimi K2.6 51, Grok 4.20 Multi-Agent 49). The right pick depends on what you value most.

  1. xAI

    Grok 4.20 Multi-Agent

    Released Mar 9, 2026

    49/100
    • ECI—
    • Price$1.25 / $2.50
    • Context1M
    Full specs Remove Grok 4.20 Multi-Agent

  2. Moonshot AI

    Kimi K2.6

    Released Apr 21, 2026

    51/100
    • ECI151.1
    • Price$0.95 / $4.00
    • Context262K
    Full specs Remove Kimi K2.6

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Too close to call

It is close. Our weighted score puts them within 2 points (Kimi K2.6 51/100, Grok 4.20 Multi-Agent 49/100), so choose by what matters most for your work: Grok 4.20 Multi-Agent on price and Grok 4.20 Multi-Agent for long inputs. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

  • CapabilityNot enough dataNo independent benchmark covers every model here yet
  • Lowest priceGrok 4.20 Multi-AgentGrok 4.20 Multi-Agent $1.56 · Kimi K2.6 $1.71 per 1M tokens (3:1 blend)
  • Longest contextGrok 4.20 Multi-AgentGrok 4.20 Multi-Agent 1,000,000 · Kimi K2.6 262,144 tokens
  • Widest inputsSame inputsGrok 4.20 Multi-Agent: Text, Images, PDFs · Kimi K2.6: Text, Images, Video
  • Self-hostingKimi K2.6Publishes downloadable weights
How the score is built
MeasureWeightGrok 4.20 Multi-AgentKimi K2.6
Price50%4139
Inputs & features30%5580
Context window20%6037
Overall100%49/10051/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Grok 4.20 Multi-Agent vs Kimi K2.6 specifications side by side
SpecificationGrok 4.20 Multi-AgentxAIKimi K2.6Moonshot AI
Capability
Capabilities Index (ECI)—151.1
ECI rank—#45 of 148
GPQA DiamondGraduate-level science questions—90.8%
FrontierMath Tiers 1–3Research-level mathematics—57.2%
OTIS Mock AIME 2024–2025Competition mathematics—96.1%
SWE-bench VerifiedFixing real GitHub issues—76.7%
SimpleQA VerifiedShort factual questions—34.9%
Price per million tokens
Input$1.25$0.95 (best)
Output$2.50 (best)$4.00
Cached input$0.20$0.16 (best)
Blended (3:1)$1.56 (best)$1.71
Long-context rateOver 200K: $2.50 / $5.00Same rate
Price sourceOfficial xAI APIOfficial Moonshot AI API
Limits
Context window1,000,000 tokens (best)262,144 tokens
Max output30,000 tokens262,144 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioNoNo
VideoNoYes
ReasoningYeslow · medium · high · xhighYes
Tool callingNoYes
Structured outputYesYes
Availability
WeightsProprietaryOpen
API model IDgrok-4.20-multi-agent-0309kimi-k2.6
API providers146 (best)
ReleasedMar 9, 2026Apr 21, 2026
Knowledge cutoff—Jan 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Grok 4.20 Multi-Agent$17.50
  • Kimi K2.6$17.50
04 — Questions

Which should you choose?

Which is better: Grok 4.20 Multi-Agent or Kimi K2.6?

It is close. Our weighted score puts them within 2 points (Kimi K2.6 51/100, Grok 4.20 Multi-Agent 49/100), so choose by what matters most for your work: Grok 4.20 Multi-Agent on price and Grok 4.20 Multi-Agent for long inputs. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

Which is cheaper, Grok 4.20 Multi-Agent or Kimi K2.6?

Grok 4.20 Multi-Agent is cheaper at $1.25 input / $2.50 output per million tokens (official xAI API price). Kimi K2.6 costs $0.95 input / $4.00 output per million tokens (official Moonshot AI API price). At a typical mix of three input tokens to one output token, that is $1.56 per million tokens for Grok 4.20 Multi-Agent versus $1.71 for Kimi K2.6 (1.1× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Grok 4.20 Multi-Agent has not been scored yet and Kimi K2.6 has an ECI of 151.1.

Which is better for coding?

There are no published SWE-bench Verified results for Grok 4.20 Multi-Agent yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that Grok 4.20 Multi-Agent does not support tool calling, which most coding agents need.

Which has the bigger context window?

Grok 4.20 Multi-Agent has the largest context window at 1,000,000 tokens, against 262,144 for Kimi K2.6. Maximum output per response: Grok 4.20 Multi-Agent up to 30,000, Kimi K2.6 up to 262,144 tokens.

Which can read images, PDFs, audio or video?

Grok 4.20 Multi-Agent accepts text, images and PDFs; Kimi K2.6 accepts text, images and video. They handle the same number of input types.

Are any of these open source?

Kimi K2.6 publishes its weights and can be self-hosted; Grok 4.20 Multi-Agent is proprietary.

Which is newer?

Kimi K2.6 is the newest, released Apr 21, 2026. Grok 4.20 Multi-Agent came out Mar 9, 2026. Knowledge cutoff: Kimi K2.6 Jan 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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