Model Comparison

Claude Opus 4.5 vs GPT-5.2 Pro

GPT-5.2 Pro significantly outperforms across most benchmarks. Claude Opus 4.5 is 5.8x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Opus 4.5 outperforms in 0 benchmarks, while GPT-5.2 Pro is better at 2 benchmarks (ARC-AGI v2, GPQA).

GPT-5.2 Pro significantly outperforms across most benchmarks.

Fri Apr 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Opus 4.5 costs less

For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 4.2x cheaper than GPT-5.2 Pro ($21.00/1M tokens).

For output processing, Claude Opus 4.5 ($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 4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Apr 17 2026 • llm-stats.com
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
OpenAI
GPT-5.2 Pro
Input tokens$21.00
Output tokens$168.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.2 Pro accepts 400,000 input tokens compared to Claude Opus 4.5's 200,000 tokens. GPT-5.2 Pro can generate longer responses up to 128,000 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
OpenAI
GPT-5.2 Pro
Input400,000 tokens
Output128,000 tokens
Fri Apr 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.5 and GPT-5.2 Pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 4.5

Text
Images
Audio
Video

GPT-5.2 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4.5

Proprietary

Closed source

GPT-5.2 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while GPT-5.2 Pro was released on 2025-12-11.

GPT-5.2 Pro is 1 month newer than Claude Opus 4.5.

Claude Opus 4.5

Nov 24, 2025

4 months ago

GPT-5.2 Pro

Dec 11, 2025

4 months ago

2w newer

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while GPT-5.2 Pro's cutoff date is not specified.

We can confirm Claude Opus 4.5's training data extends to 2025-03-31, but cannot make a direct comparison without GPT-5.2 Pro's cutoff date.

Claude Opus 4.5

Mar 2025

GPT-5.2 Pro

—

Provider Availability

Claude Opus 4.5 is available from Anthropic. GPT-5.2 Pro is available from OpenAI.

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

GPT-5.2 Pro

openai logo
OpenAI
Input Price:Input: $21.00/1MOutput Price:Output: $168.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Less expensive input tokens
Less expensive output tokens
OpenAI
Larger context window (400,000 tokens)
Higher ARC-AGI v2 score (54.2% vs 37.6%)
Higher GPQA score (93.2% vs 87.0%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
OpenAI
GPT-5.2 Pro

FAQ

Common questions about Claude Opus 4.5 vs GPT-5.2 Pro

GPT-5.2 Pro significantly outperforms across most benchmarks. Claude Opus 4.5 is made by Anthropic and GPT-5.2 Pro is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. GPT-5.2 Pro scores AIME 2025: 100.0%, HMMT 2025: 100.0%, GPQA: 93.2%, ARC-AGI: 90.5%, BrowseComp: 77.9%.
Claude Opus 4.5 is 4.2x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. GPT-5.2 Pro costs $21.00/M input and $168.00/M output via openai.
Claude Opus 4.5 supports 200K tokens and GPT-5.2 Pro supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (200K vs 400K), input pricing ($5.00 vs $21.00/M). See the full comparison above for benchmark-by-benchmark results.
Claude Opus 4.5 is developed by Anthropic and GPT-5.2 Pro is developed by OpenAI.