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Comparison · 2 models · Updated Oct 4, 2026

Kimi K2.7 Code Highspeed vs GPT-5.4

Too close to call on our weighted score (Kimi K2.7 Code Highspeed 44, GPT-5.4 43). The right pick depends on what you value most.

  1. Moonshot AI

    Kimi K2.7 Code Highspeed

    Released Jun 12, 2026

    44/100
    • ECI—
    • Price$1.90 / $8.00
    • Context262K
    Full specs Remove Kimi K2.7 Code Highspeed

  2. OpenAI

    GPT-5.4

    Released Mar 5, 2026

    43/100
    • ECI156.9
    • Price$2.50 / $15.00
    • Context1.05M
    Full specs Remove GPT-5.4

  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 a point (Kimi K2.7 Code Highspeed 44/100, GPT-5.4 43/100), so choose by what matters most for your work: Kimi K2.7 Code Highspeed on price and GPT-5.4 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 priceKimi K2.7 Code HighspeedKimi K2.7 Code Highspeed $3.42 · GPT-5.4 $5.63 per 1M tokens (3:1 blend)
  • Longest contextGPT-5.4GPT-5.4 1,050,000 · Kimi K2.7 Code Highspeed 262,144 tokens
  • Widest inputsSame inputsKimi K2.7 Code Highspeed: Text, Images, Video · GPT-5.4: Text, Images, PDFs
  • Self-hostingKimi K2.7 Code HighspeedPublishes downloadable weights
How the score is built
MeasureWeightKimi K2.7 Code HighspeedGPT-5.4
Price50%2514
Inputs & features30%8080
Context window20%3761
Overall100%44/10043/100

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.

Kimi K2.7 Code Highspeed vs GPT-5.4 specifications side by side
SpecificationKimi K2.7 Code HighspeedMoonshot AIGPT-5.4OpenAI
Capability
Capabilities Index (ECI)—156.9
ECI rank—#16 of 148
GPQA DiamondGraduate-level science questions—93.3%
FrontierMath Tiers 1–3Research-level mathematics—78.6%
OTIS Mock AIME 2024–2025Competition mathematics—97.8%
SWE-bench VerifiedFixing real GitHub issues—76.9%
SimpleQA VerifiedShort factual questions—45.1%
Price per million tokens
Input$1.90 (best)$2.50
Output$8.00 (best)$15.00
Cached input—$0.25
Blended (3:1)$3.42 (best)$5.63
Long-context rateSame rateOver 272K: $5.00 / $22.50
Price sourceMedian of 11 providersOfficial OpenAI API
Limits
Context window262,144 tokens1,050,000 tokens (best)
Max output262,144 tokens (best)128,000 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoYes
AudioNoNo
VideoYesNo
ReasoningYesYeslow · medium · high · xhigh
Tool callingYesYes
Structured outputYesYes
Availability
WeightsOpenProprietary
API model ID—gpt-5.4
API providers1136 (best)
ReleasedJun 12, 2026Mar 5, 2026
Knowledge cutoffJan 2025Aug 31, 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 Highspeed$35.00
  • GPT-5.4$55.00
04 — Questions

Which should you choose?

Which is better: Kimi K2.7 Code Highspeed or GPT-5.4?

It is close. Our weighted score puts them within a point (Kimi K2.7 Code Highspeed 44/100, GPT-5.4 43/100), so choose by what matters most for your work: Kimi K2.7 Code Highspeed on price and GPT-5.4 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, Kimi K2.7 Code Highspeed or GPT-5.4?

Kimi K2.7 Code Highspeed is cheaper at $1.90 input / $8.00 output per million tokens (median across 11 API providers). GPT-5.4 costs $2.50 input / $15.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $3.42 per million tokens for Kimi K2.7 Code Highspeed versus $5.63 for GPT-5.4 (1.6× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Kimi K2.7 Code Highspeed has not been scored yet and GPT-5.4 has an ECI of 156.9.

Which is better for coding?

There are no published SWE-bench Verified results for Kimi K2.7 Code Highspeed yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.

Which has the bigger context window?

GPT-5.4 has the largest context window at 1,050,000 tokens, against 262,144 for Kimi K2.7 Code Highspeed. Maximum output per response: Kimi K2.7 Code Highspeed up to 262,144, GPT-5.4 up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Kimi K2.7 Code Highspeed accepts text, images and video; GPT-5.4 accepts text, images and PDFs. They handle the same number of input types.

Are any of these open source?

Kimi K2.7 Code Highspeed publishes its weights and can be self-hosted; GPT-5.4 is proprietary.

Which is newer?

Kimi K2.7 Code Highspeed is the newest, released Jun 12, 2026. GPT-5.4 came out Mar 5, 2026. Knowledge cutoff: Kimi K2.7 Code Highspeed Jan 2025, GPT-5.4 Aug 31, 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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