ZMIME
Comparison · 2 models · Updated Oct 4, 2026

GPT-5.2 Pro vs GPT-5.4 Pro

GPT-5.4 Pro comes out ahead, 60 to 56 on our weighted score, though GPT-5.2 Pro is 14% cheaper per token.

  1. OpenAI

    GPT-5.2 Pro

    Released Dec 11, 2025

    56/100
    • ECI155.4
    • Price$21.00 / $168.00
    • Context400K
    Full specs Remove GPT-5.2 Pro
  2. Our pick

    OpenAI

    GPT-5.4 Pro

    Released Mar 5, 2026

    60/100
    • ECI159.1
    • Price$30.00 / $180.00
    • Context1.05M
    Full specs Remove GPT-5.4 Pro

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

GPT-5.4 Pro is our pick

GPT-5.4 Pro is the better all-round choice, scoring 60/100 against GPT-5.2 Pro (56). It leads on capability and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGPT-5.4 ProCapabilities Index (ECI): GPT-5.4 Pro 159.1 · GPT-5.2 Pro 155.4
  • Lowest priceGPT-5.2 ProGPT-5.2 Pro $57.75 · GPT-5.4 Pro $67.50 per 1M tokens (3:1 blend)
  • Longest contextGPT-5.4 ProGPT-5.4 Pro 1,050,000 · GPT-5.2 Pro 400,000 tokens
  • Widest inputsSame inputsGPT-5.2 Pro: Text, Images · GPT-5.4 Pro: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGPT-5.2 ProGPT-5.4 Pro
CapabilityCapabilities Index (ECI)50%8590
Price25%00
Inputs & features15%6060
Context window10%4461
Overall100%56/10060/100
02 — Side by side

Every spec in one table

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

GPT-5.2 Pro vs GPT-5.4 Pro specifications side by side
SpecificationGPT-5.2 ProOpenAIGPT-5.4 ProOpenAI
Capability
Capabilities Index (ECI)155.4159.1 (best)
ECI rank#25 of 148#11 of 148 (best)
GPQA DiamondGraduate-level science questions—94.6%
FrontierMath Tiers 1–3Research-level mathematics74.0%82.5% (best)
SimpleQA VerifiedShort factual questions—46.3%
Price per million tokens
Input$21.00 (best)$30.00
Output$168.00 (best)$180.00
Cached input——
Blended (3:1)$57.75 (best)$67.50
Long-context rateSame rateOver 272K: $60.00 / $270.00
Price sourceOfficial OpenAI APIOfficial OpenAI API
Limits
Context window400,000 tokens1,050,000 tokens (best)
Max output128,000 tokens128,000 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoNo
AudioNoNo
VideoNoNo
ReasoningYesmedium · high · xhighYesmedium · high · xhigh
Tool callingYesYes
Structured outputNoNo
Availability
WeightsProprietaryProprietary
API model IDgpt-5.2-progpt-5.4-pro
API providers816 (best)
ReleasedDec 11, 2025Mar 5, 2026
Knowledge cutoffAug 31, 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.

  • GPT-5.2 Pro$546.00
  • GPT-5.4 Pro$660.00
04 — Questions

Which should you choose?

Which is better: GPT-5.2 Pro or GPT-5.4 Pro?

GPT-5.4 Pro is the better all-round choice, scoring 60/100 against GPT-5.2 Pro (56). It leads on capability and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, GPT-5.2 Pro or GPT-5.4 Pro?

GPT-5.2 Pro is cheaper at $21.00 input / $168.00 output per million tokens (official OpenAI API price). GPT-5.4 Pro costs $30.00 input / $180.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $57.75 per million tokens for GPT-5.2 Pro versus $67.50 for GPT-5.4 Pro (1.2× as much).

Which scores higher on benchmarks?

GPT-5.4 Pro scores higher on the Capabilities Index (ECI): GPT-5.4 Pro 159.1 (#11 of 148) and GPT-5.2 Pro 155.4 (#25 of 148). The confidence ranges of the top two overlap (156.5–161.9 vs 153.0–158.2), so treat the gap as small. On individual benchmarks: FrontierMath Tiers 1–3 — GPT-5.4 Pro 82.5%, GPT-5.2 Pro 74.0%.

Which is better for coding?

There are no published SWE-bench Verified results for GPT-5.2 Pro and GPT-5.4 Pro yet, so there is no like-for-like coding score. On overall capability, GPT-5.4 Pro leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

GPT-5.4 Pro has the largest context window at 1,050,000 tokens, against 400,000 for GPT-5.2 Pro. Maximum output per response: GPT-5.2 Pro up to 128,000, GPT-5.4 Pro up to 128,000 tokens.

Which can read images, PDFs, audio or video?

GPT-5.2 Pro accepts text and images; GPT-5.4 Pro accepts text and images. They handle the same number of input types.

Are any of these open source?

No. GPT-5.2 Pro and GPT-5.4 Pro are proprietary and only available through APIs and apps.

Which is newer?

GPT-5.4 Pro is the newest, released Mar 5, 2026. GPT-5.2 Pro came out Dec 11, 2025. Knowledge cutoff: GPT-5.2 Pro Aug 31, 2025, GPT-5.4 Pro 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

Related comparisons