ZMIME
Comparison · 2 models · Updated Oct 4, 2026

GPT-5.4 vs Kimi K2.7 Code Highspeed

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. 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

  2. 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

  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 inputsGPT-5.4: Text, Images, PDFs · Kimi K2.7 Code Highspeed: Text, Images, Video
  • Self-hostingKimi K2.7 Code HighspeedPublishes downloadable weights
How the score is built
MeasureWeightGPT-5.4Kimi K2.7 Code Highspeed
Price50%1425
Inputs & features30%8080
Context window20%6137
Overall100%43/10044/100

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.

GPT-5.4 vs Kimi K2.7 Code Highspeed specifications side by side
SpecificationGPT-5.4OpenAIKimi K2.7 Code HighspeedMoonshot AI
Capability
Capabilities Index (ECI)156.9—
ECI rank#16 of 148—
GPQA DiamondGraduate-level science questions93.3%—
FrontierMath Tiers 1–3Research-level mathematics78.6%—
OTIS Mock AIME 2024–2025Competition mathematics97.8%—
SWE-bench VerifiedFixing real GitHub issues76.9%—
SimpleQA VerifiedShort factual questions45.1%—
Price per million tokens
Input$2.50$1.90 (best)
Output$15.00$8.00 (best)
Cached input$0.25—
Blended (3:1)$5.63$3.42 (best)
Long-context rateOver 272K: $5.00 / $22.50Same rate
Price sourceOfficial OpenAI APIMedian of 11 providers
Limits
Context window1,050,000 tokens (best)262,144 tokens
Max output128,000 tokens262,144 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioNoNo
VideoNoYes
ReasoningYeslow · medium · high · xhighYes
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryOpen
API model IDgpt-5.4—
API providers36 (best)11
ReleasedMar 5, 2026Jun 12, 2026
Knowledge cutoffAug 31, 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.

  • GPT-5.4$55.00
  • Kimi K2.7 Code Highspeed$35.00
04 — Questions

Which should you choose?

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

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, GPT-5.4 or Kimi K2.7 Code Highspeed?

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. GPT-5.4 has an ECI of 156.9 and Kimi K2.7 Code Highspeed has not been scored yet.

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: GPT-5.4 up to 128,000, Kimi K2.7 Code Highspeed up to 262,144 tokens.

Which can read images, PDFs, audio or video?

GPT-5.4 accepts text, images and PDFs; Kimi K2.7 Code Highspeed accepts text, images and video. 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: GPT-5.4 Aug 31, 2025, Kimi K2.7 Code Highspeed 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

Related comparisons