Claude Opus 4.8 vs GPT-5.2 Pro
Claude Opus 4.8 significantly outperforms across most benchmarks. Claude Opus 4.8 is 5.8x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude Opus 4.8 outperforms in 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam), while GPT-5.2 Pro is better at 0 benchmarks. Claude Opus 4.8 significantly outperforms across most benchmarks.
On price, Claude Opus 4.8 is roughly 5.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Opus 4.8 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Claude Opus 4.8
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- cost matters — it's about 5.8x cheaper per token
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped May 2026
Choose GPT-5.2 Pro
- you want predictable pricing at $21.00/M input and $168.00/M output
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Claude Opus 4.8 outperforms in 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam), while GPT-5.2 Pro is better at 0 benchmarks.
Claude Opus 4.8 significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Opus 4.8 ($5.00/1M tokens) is 4.2x cheaper than GPT-5.2 Pro ($21.00/1M tokens).
For output processing, Claude Opus 4.8 ($25.00/1M tokens) is 6.7x cheaper than GPT-5.2 Pro ($168.00/1M tokens).
In conclusion, GPT-5.2 Pro is more expensive than Claude Opus 4.8.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Opus 4.8 accepts 1,000,000 input tokens compared to GPT-5.2 Pro's 400,000 tokens. Both models can generate responses up to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both Claude Opus 4.8 and GPT-5.2 Pro support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Opus 4.8
GPT-5.2 Pro
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Opus 4.8 was released on 2026-05-28, while GPT-5.2 Pro was released on 2025-12-11.
Claude Opus 4.8 is 6 months newer than GPT-5.2 Pro.
May 28, 2026
3 months ago
5mo newerDec 11, 2025
8 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude Opus 4.8 is available from Anthropic, Vertex AI. GPT-5.2 Pro is available from OpenAI.
Claude Opus 4.8
GPT-5.2 Pro
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Opus 4.8 and GPT-5.2 Pro side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Opus 4.8 vs GPT-5.2 Pro.