Modeldex

OpenAI · Text line

GPT Pro

4 stages over 7 months, from GPT-5 Pro in Oct 2025 to GPT-5.5 Pro in Apr 2026.

Evolution chamber01 / 04
OpenAI

GPT-5 Pro

CTX400K
81Quality
Reasoning · Vision · Tools
TextImageInput$15/M
TextOutput$120/M

Higher-accuracy GPT-5 tier for tough analysis, coding reviews, and planning

PaidProprietary670/1044
Ready to evolve

Every generation. A new possibility.

GPT-5 Pro · Oct 2025
View model : GPT-5 Pro

4 stages, from GPT-5 Pro (Oct 2025) to GPT-5.5 Pro (Apr 2026). Press Evolve to watch each step.

How it grew

Context window

  1. 400Kv5
  2. 400Kv5.2
  3. 1.05Mv5.4
  4. 1.05Mv5.5

Max output

  1. 272Kv5
  2. 128Kv5.2
  3. 128Kv5.4
  4. 128Kv5.5

Output priceper 1M tokens, lower is better

  1. $120v5
  2. $168v5.2
  3. $180v5.4
  4. $180v5.5

Every stage

  1. v5 Stage 1

    OpenAI

    GPT-5 Pro

    CTX400K
    81Quality
    Reasoning · Vision · Tools
    TextImageInput$15/M
    TextOutput$120/M

    Higher-accuracy GPT-5 tier for tough analysis, coding reviews, and planning

    PaidProprietary670/1044

  2. v5.2 Stage 2

    OpenAI

    GPT-5.2 Pro

    CTX400K
    90Quality
    Reasoning · Vision · Tools
    TextImageInput$21/M
    TextOutput$168/M

    Higher-accuracy GPT-5.2 variant for tougher reasoning and review workflows

    PaidProprietary725/1044

  3. v5.4 Stage 3

    OpenAI

    GPT-5.4 Pro

    CTX1.05M
    96Quality
    Reasoning · Vision · Tools
    TextImageInput$30/M
    TextOutput$180/M

    More exact GPT-5.4 tier for demanding professional reasoning and agent tasks

    PaidProprietary820/1044

  4. v5.5 Stage 4

    OpenAI

    GPT-5.5 Pro

    CTX1.05M
    97Quality
    Reasoning · Vision · Tools
    TextImagePDFInput$30/M
    TextOutput$180/M

    Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding

    PaidProprietary892/1044

More OpenAI lines

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