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Head-to-head comparison

Kimi K2.7 Code vs GPT-5.6 Luna

Kimi K2.7 Code (Moonshot AI) and GPT-5.6 Luna (OpenAI) 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 17 August 2026

As of 17 August 2026, GPT-5.6 Luna holds the stronger ModelCap Index position (#17 vs #26); GPT-5.6 Luna is 2.9× cheaper per output token ($1.20/1M vs $3.50/1M); and GPT-5.6 Luna offers the longer context window (1M vs 262K tokens).

Which should you choose?

Choose Kimi K2.7 Code if…

  • you want provider choice — 14 listed API providers against 3.

Choose GPT-5.6 Luna if…

  • you want the stronger overall ModelCap Index position — #17 against #26 (68.0 vs 63.2 points).
  • API cost matters — $1.20/1M output tokens against $3.50/1M, about 2.9× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.20/1M against $0.71/1M.
  • you need the longer context window — 1M tokens against 262K.
  • LMArena Agent is your yardstick — 4.3% against 1.1%.
  • Artificial Analysis Intelligence Index is your yardstick — 52.3 against 43.0.
  • you want the more recently listed model — GPT-5.6 Luna was listed 9 July 2026, Kimi K2.7 Code 12 June 2026.

Kimi K2.7 Code vs GPT-5.6 Luna: specs, pricing and context

Specification comparison of Kimi K2.7 Code and GPT-5.6 Luna
FieldKimi K2.7 CodeMoonshot AIGPT-5.6 LunaOpenAI
ModelCap Index position#26#17
Index score63.268.0
EvidenceMeasuredMeasured
Input price / 1M tokens$0.71$0.20
Output price / 1M tokens$3.50$1.20
Context window262K tokens1M tokens
Max output tokens262K128K
API providers listed143
Weight accessRestricted licenseAPI only
Input modalitiesText, ImageFile, Image, Text
First listed12 June 20269 July 2026
PublisherMoonshot AIOpenAI

Evidence: 2 public benchmark observations across 2 boards · 6 public benchmark observations across 6 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Kimi K2.7 Code vs GPT-5.6 Luna

Public benchmark boards where Kimi K2.7 Code or GPT-5.6 Luna has a published result
BoardKimi K2.7 CodeGPT-5.6 LunaLeads
Arena codingArena (LMArena)—14981489–1508X-HighOnly one result
LMArena AgentLMArena1.1%-1.1%–3.2%4.3%2.4%–6.2%X-HighGPT-5.6 Luna
ARC-AGI-2ARC Prize Foundation—59.5%MaxOnly one result
ARC-AGI-3ARC Prize Foundation—0.2%MaxOnly one result
Artificial Analysis Intelligence IndexArtificial Analysis43.0intelligence-index52.3intelligence-indexGPT-5.6 Luna

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 K2.7 Code vs GPT-5.6 Luna: common questions

Is Kimi K2.7 Code better than GPT-5.6 Luna?

GPT-5.6 Luna ranks higher on the ModelCap Index as of 17 August 2026: #17 against #26. 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 K2.7 Code cheaper than GPT-5.6 Luna?

GPT-5.6 Luna is cheaper on output tokens: $1.20/1M against $3.50/1M. Input tokens are $0.71/1M for Kimi K2.7 Code and $0.20/1M for GPT-5.6 Luna. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Kimi K2.7 Code or GPT-5.6 Luna?

GPT-5.6 Luna has the larger context window: 1M tokens against 262K.

Which is better for coding, Kimi K2.7 Code or GPT-5.6 Luna?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Kimi K2.7 Code and GPT-5.6 Luna open-weight models?

Kimi K2.7 Code: Restricted license. GPT-5.6 Luna: 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 K2.7 Code and GPT-5.6 Luna?

ModelCap currently lists 14 API providers for Kimi K2.7 Code and 3 for GPT-5.6 Luna, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Kimi K2.7 Code vs GPT-5.6 Luna comparison?

Every figure comes from the sealed ModelCap dataset published 17 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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