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Head-to-head comparison

Claude Opus 5 vs GPT-5.2 Chat

Claude Opus 5 (Anthropic) and GPT-5.2 Chat (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, Claude Opus 5 holds the stronger ModelCap Index position (#2 vs #9); GPT-5.2 Chat is 1.8× cheaper per output token ($14.00/1M vs $25.00/1M); and Claude Opus 5 offers the longer context window (1M vs 128K tokens).

Which should you choose?

Choose Claude Opus 5 if…

  • you want the stronger overall ModelCap Index position — #2 against #9 (79.6 vs 74.1 points).
  • you need the longer context window — 1M tokens against 128K.
  • you want provider choice — 5 listed API providers against 1.
  • Arena coding is your yardstick — 1530 against 1515.
  • you want the more recently listed model — Claude Opus 5 was listed 24 July 2026, GPT-5.2 Chat 10 December 2025.

Choose GPT-5.2 Chat if…

  • API cost matters — $14.00/1M output tokens against $25.00/1M, about 1.8× cheaper.
  • your workload is prompt-heavy — input tokens cost $1.75/1M against $5.00/1M.

Claude Opus 5 vs GPT-5.2 Chat: specs, pricing and context

Specification comparison of Claude Opus 5 and GPT-5.2 Chat
FieldClaude Opus 5AnthropicGPT-5.2 ChatOpenAI
ModelCap Index position#2#9
Index score79.674.1
EvidenceMeasuredMeasured
Input price / 1M tokens$5.00$1.75
Output price / 1M tokens$25.00$14.00
Context window1M tokens128K tokens
Max output tokens128K32K
API providers listed51
Weight accessAPI onlyAPI only
Input modalitiesText, Image, FileFile, Image, Text
First listed24 July 202610 December 2025
PublisherAnthropicOpenAI

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

Benchmark scores: Claude Opus 5 vs GPT-5.2 Chat

Public benchmark boards where Claude Opus 5 or GPT-5.2 Chat has a published result
BoardClaude Opus 5GPT-5.2 ChatLeads
Arena textArena (LMArena)—14761472–1480Only one result
Arena codingArena (LMArena)15301521–1539High15151508–1522Claude Opus 5
LMArena AgentLMArena12.0%10.6%–13.4%High—Only one result
ARC-AGI-2ARC Prize Foundation90.4%Max—Only one result
ARC-AGI-3ARC Prize Foundation30.2%High—Only 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.

Claude Opus 5 vs GPT-5.2 Chat: common questions

Is Claude Opus 5 better than GPT-5.2 Chat?

Claude Opus 5 ranks higher on the ModelCap Index as of 11 August 2026: #2 against #9. 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 Claude Opus 5 cheaper than GPT-5.2 Chat?

GPT-5.2 Chat is cheaper on output tokens: $14.00/1M against $25.00/1M. Input tokens are $5.00/1M for Claude Opus 5 and $1.75/1M for GPT-5.2 Chat. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Claude Opus 5 or GPT-5.2 Chat?

Claude Opus 5 has the larger context window: 1M tokens against 128K.

Which is better for coding, Claude Opus 5 or GPT-5.2 Chat?

Arena coding: Claude Opus 5 1530, GPT-5.2 Chat 1515 — Claude Opus 5 leads.

Are Claude Opus 5 and GPT-5.2 Chat open-weight models?

Claude Opus 5: API only. GPT-5.2 Chat: 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 Claude Opus 5 and GPT-5.2 Chat?

ModelCap currently lists 5 API providers for Claude Opus 5 and 1 for GPT-5.2 Chat, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Claude Opus 5 vs GPT-5.2 Chat 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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