Claude Opus 4.5 vs GPT-4 Comparison

Comparing Claude Opus 4.5 and GPT-4 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Opus 4.5 outperforms in 1 benchmarks (GPQA), while GPT-4 is better at 0 benchmarks.

Claude Opus 4.5 significantly outperforms across most benchmarks.

Sat Mar 14 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 6.0x cheaper than GPT-4 ($30.00/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 2.4x cheaper than GPT-4 ($60.00/1M tokens).

In conclusion, GPT-4 is more expensive than Claude Opus 4.5.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Claude Opus 4.5

Input tokens$5.00

Output tokens$25.00

Best providerAnthropic

GPT-4

Input tokens$30.00

Output tokens$60.00

Best providerAzure

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Context Window

Maximum input and output token capacity

Claude Opus 4.5 accepts 200,000 input tokens compared to GPT-4's 32,768 tokens. Claude Opus 4.5 can generate longer responses up to 64,000 tokens, while GPT-4 is limited to 32,768 tokens.

Claude Opus 4.5

Input200,000 tokens

Output64,000 tokens

GPT-4

Input32,768 tokens

Output32,768 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.5 and GPT-4 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-4

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-4

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while GPT-4 was released on 2023-06-13.

Claude Opus 4.5 is 30 months newer than GPT-4.

Claude Opus 4.5

Nov 24, 2025

3 months ago

2.5yr newer

GPT-4

Jun 13, 2023

2.8 years ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a knowledge cutoff of 2025-03-31, while GPT-4 has a cutoff of 2022-12-31.

Claude Opus 4.5 has more recent training data (up to 2025-03-31), making it potentially better informed about events through that date compared to GPT-4 (2022-12-31).

Claude Opus 4.5

Mar 2025

2.3 yr newer

GPT-4

Dec 2022

Provider Availability

Claude Opus 4.5 is available from Anthropic. GPT-4 is available from Azure, OpenAI. The availability of providers can affect quality of the model and reliability.