Claude Sonnet 4 vs GPT-5 High Comparison

Comparing Claude Sonnet 4 and GPT-5 High across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Sonnet 4 outperforms in 0 benchmarks, while GPT-5 High is better at 2 benchmarks (AIME 2025, GPQA).

GPT-5 High significantly outperforms across most benchmarks.

Sat Mar 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 High costs less

For input processing, Claude Sonnet 4 ($3.00/1M tokens) is 2.4x more expensive than GPT-5 High ($1.25/1M tokens).

For output processing, Claude Sonnet 4 ($15.00/1M tokens) is 1.5x more expensive than GPT-5 High ($10.00/1M tokens).

In conclusion, Claude Sonnet 4 is more expensive than GPT-5 High.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Claude Sonnet 4

Input tokens$3.00

Output tokens$15.00

Best providerAnthropic

GPT-5 High

Input tokens$1.25

Output tokens$10.00

Best providerOpenAI

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Context Window

Maximum input and output token capacity

GPT-5 High accepts 400,000 input tokens compared to Claude Sonnet 4's 200,000 tokens. GPT-5 High can generate longer responses up to 128,000 tokens, while Claude Sonnet 4 is limited to 64,000 tokens.

Claude Sonnet 4

Input200,000 tokens

Output64,000 tokens

GPT-5 High

Input400,000 tokens

Output128,000 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4 and GPT-5 High support multimodal inputs.

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

Claude Sonnet 4

Text

Images

Audio

Video

GPT-5 High

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 Sonnet 4

Proprietary

Closed source

GPT-5 High

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4 was released on 2025-05-22, while GPT-5 High was released on 2025-08-07.

GPT-5 High is 3 months newer than Claude Sonnet 4.

Claude Sonnet 4

May 22, 2025

9 months ago

GPT-5 High

Aug 7, 2025

7 months ago

2mo newer

Knowledge Cutoff

When training data ends

GPT-5 High has a documented knowledge cutoff of 2024-09-30, while Claude Sonnet 4's cutoff date is not specified.

We can confirm GPT-5 High's training data extends to 2024-09-30, but cannot make a direct comparison without Claude Sonnet 4's cutoff date.

Claude Sonnet 4

—

GPT-5 High

Sep 2024

Provider Availability

Claude Sonnet 4 is available from Anthropic, Bedrock, Google. GPT-5 High is available from OpenAI. The availability of providers can affect quality of the model and reliability.