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Head-to-head comparison

GPT-5.2 Chat vs GPT-5.5

GPT-5.2 Chat (OpenAI) and GPT-5.5 (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 11 August 2026

As of 11 August 2026, GPT-5.2 Chat holds the stronger ModelCap Index position (#9 vs #10); GPT-5.2 Chat is 2.1× cheaper per output token ($14.00/1M vs $30.00/1M); and GPT-5.5 offers the longer context window (1M vs 128K tokens).

Which should you choose?

Choose GPT-5.2 Chat if…

  • you want the stronger overall ModelCap Index position — #9 against #10 (74.1 vs 73.9 points).
  • API cost matters — $14.00/1M output tokens against $30.00/1M, about 2.1× cheaper.
  • your workload is prompt-heavy — input tokens cost $1.75/1M against $5.00/1M.

Choose GPT-5.5 if…

  • you need the longer context window — 1M tokens against 128K.
  • you want provider choice — 3 listed API providers against 1.
  • Arena text is your yardstick — 1477 against 1476.
  • Arena coding is your yardstick — 1520 against 1515.
  • you want the more recently listed model — GPT-5.5 was listed 24 April 2026, GPT-5.2 Chat 10 December 2025.

GPT-5.2 Chat vs GPT-5.5: specs, pricing and context

Specification comparison of GPT-5.2 Chat and GPT-5.5
FieldGPT-5.2 ChatOpenAIGPT-5.5OpenAI
ModelCap Index position#9#10
Index score74.173.9
EvidenceMeasuredMeasured
Input price / 1M tokens$1.75$5.00
Output price / 1M tokens$14.00$30.00
Context window128K tokens1M tokens
Max output tokens32K128K
API providers listed13
Weight accessAPI onlyAPI only
Input modalitiesFile, Image, TextFile, Image, Text
First listed10 December 202524 April 2026
PublisherOpenAIOpenAI

Evidence: 2 public benchmark observations across 2 boards · 5 public benchmark observations across 5 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: GPT-5.2 Chat vs GPT-5.5

Public benchmark boards where GPT-5.2 Chat or GPT-5.5 has a published result
BoardGPT-5.2 ChatGPT-5.5Leads
Arena textArena (LMArena)14761472–148014771473–1481GPT-5.5
Arena codingArena (LMArena)15151508–152215201513–1526HighGPT-5.5
LMArena AgentLMArena—8.5%7.5%–9.4%X-HighOnly one result
ARC-AGI-2ARC Prize Foundation—85.0%X-HighOnly one result
ARC-AGI-3ARC Prize Foundation—0.4%HighOnly one result

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.

GPT-5.2 Chat vs GPT-5.5: common questions

Is GPT-5.2 Chat better than GPT-5.5?

GPT-5.2 Chat ranks higher on the ModelCap Index as of 11 August 2026: #9 against #10. 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 GPT-5.2 Chat cheaper than GPT-5.5?

GPT-5.2 Chat is cheaper on output tokens: $14.00/1M against $30.00/1M. Input tokens are $1.75/1M for GPT-5.2 Chat and $5.00/1M for GPT-5.5. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, GPT-5.2 Chat or GPT-5.5?

GPT-5.5 has the larger context window: 1M tokens against 128K.

Which is better for coding, GPT-5.2 Chat or GPT-5.5?

Arena coding: GPT-5.2 Chat 1515, GPT-5.5 1520 — GPT-5.5 leads.

Are GPT-5.2 Chat and GPT-5.5 open-weight models?

GPT-5.2 Chat: API only. GPT-5.5: 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 GPT-5.2 Chat and GPT-5.5?

ModelCap currently lists 1 API provider for GPT-5.2 Chat and 3 for GPT-5.5, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this GPT-5.2 Chat vs GPT-5.5 comparison?

Every figure comes from the sealed ModelCap dataset published 11 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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