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Comparison · 3 models · Updated Oct 4, 2026

Kimi K2.7 Code vs Gemini 3 Pro Preview vs Grok 4.3

Too close to call on our weighted score (Gemini 3 Pro Preview 67, Grok 4.3 67, Kimi K2.7 Code 64). The right pick depends on what you value most.

  1. Moonshot AI

    Kimi K2.7 Code

    Released Jun 12, 2026

    64/100
    • ECI150.0
    • Price$0.95 / $4.00
    • Context262K
    Full specs Remove Kimi K2.7 Code

  2. Google

    Gemini 3 Pro Preview

    Released Nov 18, 2025

    67/100
    • ECI153.0
    • Price$2.00 / $12.00
    • Context1.05M
    Full specs Remove Gemini 3 Pro Preview

  3. xAI

    Grok 4.3

    Released Apr 17, 2026

    67/100
    • ECI149.2
    • Price$1.25 / $2.50
    • Context1M
    Full specs Remove Grok 4.3
01 — Verdict

Too close to call

It is close. Our weighted score puts them within a point (Gemini 3 Pro Preview 67/100, Grok 4.3 67/100, Kimi K2.7 Code 64/100), so choose by what matters most for your work: Gemini 3 Pro Preview for raw capability and Grok 4.3 on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGemini 3 Pro PreviewCapabilities Index (ECI): Gemini 3 Pro Preview 153.0 · Kimi K2.7 Code 150.0 · Grok 4.3 149.2
  • Lowest priceGrok 4.3Grok 4.3 $1.56 · Kimi K2.7 Code $1.71 · Gemini 3 Pro Preview $4.50 per 1M tokens (3:1 blend)
  • Longest contextGemini 3 Pro PreviewGemini 3 Pro Preview 1,048,576 · Grok 4.3 1,000,000 · Kimi K2.7 Code 262,144 tokens
  • Widest inputsGemini 3 Pro PreviewKimi K2.7 Code: Text, Images, Video · Gemini 3 Pro Preview: Text, Images, PDFs, Audio, Video · Grok 4.3: Text, Images, PDFs
  • Self-hostingKimi K2.7 CodePublishes downloadable weights
How the score is built
MeasureWeightKimi K2.7 CodeGemini 3 Pro PreviewGrok 4.3
CapabilityCapabilities Index (ECI)50%788277
Price25%391941
Inputs & features15%8010080
Context window10%376160
Overall100%64/10067/10067/100
02 — Side by side

Every spec in one table

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

Kimi K2.7 Code vs Gemini 3 Pro Preview vs Grok 4.3 specifications side by side
SpecificationKimi K2.7 CodeMoonshot AIGemini 3 Pro PreviewGoogleGrok 4.3xAI
Capability
Capabilities Index (ECI)150.0153.0 (best)149.2
ECI rank#49 of 148#39 of 148 (best)#55 of 148
GPQA DiamondGraduate-level science questions87.9%92.6% (best)88.8%
FrontierMath Tiers 1–3Research-level mathematics54.0% (best)—42.8%
OTIS Mock AIME 2024–2025Competition mathematics95.6% (best)91.4%93.3%
SWE-bench VerifiedFixing real GitHub issues—72.9%—
SimpleQA VerifiedShort factual questions36.5% (best)—33.2%
Price per million tokens
Input$0.95 (best)$2.00$1.25
Output$4.00$12.00$2.50 (best)
Cached input$0.19 (best)—$0.20
Blended (3:1)$1.71$4.50$1.56 (best)
Long-context rateSame rateSame rateOver 200K: $2.50 / $5.00
Price sourceOfficial Moonshot AI APIMedian of 2 providersOfficial xAI API
Limits
Context window262,144 tokens1,048,576 tokens (best)1,000,000 tokens
Max output262,144 tokens (best)65,536 tokens30,000 tokens
Inputs and features
TextYesYesYes
ImagesYesYesYes
PDFsNoYesYes
AudioNoYesNo
VideoYesYesNo
ReasoningYesYesYeslow · medium · high
Tool callingYesYesYes
Structured outputYesYesYes
Availability
WeightsOpenProprietaryProprietary
API model IDkimi-k2.7-code—grok-4.3
API providers51 (best)327
ReleasedJun 12, 2026Nov 18, 2025Apr 17, 2026
Knowledge cutoffJan 2025Jan 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.

  • Kimi K2.7 Code$17.50
  • Gemini 3 Pro Preview$44.00
  • Grok 4.3$17.50
04 — Questions

Which should you choose?

Which is better: Kimi K2.7 Code, Gemini 3 Pro Preview or Grok 4.3?

It is close. Our weighted score puts them within a point (Gemini 3 Pro Preview 67/100, Grok 4.3 67/100, Kimi K2.7 Code 64/100), so choose by what matters most for your work: Gemini 3 Pro Preview for raw capability and Grok 4.3 on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Kimi K2.7 Code, Gemini 3 Pro Preview or Grok 4.3?

Grok 4.3 is cheaper at $1.25 input / $2.50 output per million tokens (official xAI API price). Kimi K2.7 Code costs $0.95 input / $4.00 output per million tokens (official Moonshot AI API price); Gemini 3 Pro Preview costs $2.00 input / $12.00 output per million tokens (median across 2 API providers). At a typical mix of three input tokens to one output token, that is $1.56 per million tokens for Grok 4.3 versus $1.71 for Kimi K2.7 Code (1.1× as much) and $4.50 for Gemini 3 Pro Preview (2.9× as much).

Which scores higher on benchmarks?

Gemini 3 Pro Preview scores higher on the Capabilities Index (ECI): Gemini 3 Pro Preview 153.0 (#39 of 148), Kimi K2.7 Code 150.0 (#49 of 148) and Grok 4.3 149.2 (#55 of 148). The confidence ranges of the top two overlap (150.6–155.2 vs 148.1–151.8), so treat the gap as small. On individual benchmarks: GPQA Diamond — Gemini 3 Pro Preview 92.6%, Grok 4.3 88.8%, Kimi K2.7 Code 87.9%; OTIS Mock AIME 2024–2025 — Kimi K2.7 Code 95.6%, Grok 4.3 93.3%, Gemini 3 Pro Preview 91.4%.

Which is better for coding?

There are no published SWE-bench Verified results for Kimi K2.7 Code and Grok 4.3 yet, so there is no like-for-like coding score. On overall capability, Gemini 3 Pro Preview leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.

Which has the bigger context window?

Gemini 3 Pro Preview has the largest context window at 1,048,576 tokens, against 1,000,000 for Grok 4.3 and 262,144 for Kimi K2.7 Code. Maximum output per response: Kimi K2.7 Code up to 262,144, Gemini 3 Pro Preview up to 65,536, Grok 4.3 up to 30,000 tokens.

Which can read images, PDFs, audio or video?

Kimi K2.7 Code accepts text, images and video; Gemini 3 Pro Preview accepts text, images, PDFs, audio and video; Grok 4.3 accepts text, images and PDFs. Gemini 3 Pro Preview handles the widest range of inputs.

Are any of these open source?

Kimi K2.7 Code publishes its weights and can be self-hosted; Gemini 3 Pro Preview and Grok 4.3 is proprietary.

Which is newer?

Kimi K2.7 Code is the newest, released Jun 12, 2026. Grok 4.3 came out Apr 17, 2026; Gemini 3 Pro Preview came out Nov 18, 2025. Knowledge cutoff: Kimi K2.7 Code Jan 2025, Gemini 3 Pro Preview 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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