GPT-5.4 vs Claude Opus 4.5 Comparison

Comparing GPT-5.4 and Claude Opus 4.5 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

GPT-5.4 outperforms in 5 benchmarks (ARC-AGI v2, GPQA, MCP Atlas, Tau2 Telecom, Terminal-Bench 2.0), while Claude Opus 4.5 is better at 0 benchmarks.

GPT-5.4 significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.4 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 2.0x cheaper than Claude Opus 4.5 ($5.00/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 1.7x cheaper than Claude Opus 4.5 ($25.00/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than GPT-5.4.*

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

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

GPT-5.4

Input tokens$2.50

Output tokens$15.00

Best providerOpenAI

Claude Opus 4.5

Input tokens$5.00

Output tokens$25.00

Best providerAnthropic

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Context Window

Maximum input and output token capacity

GPT-5.4 accepts 1,000,000 input tokens compared to Claude Opus 4.5's 200,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

GPT-5.4

Input1,000,000 tokens

Output128,000 tokens

Claude Opus 4.5

Input200,000 tokens

Output64,000 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and Claude Opus 4.5 support multimodal inputs.

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

GPT-5.4

Text

Images

Audio

Video

Claude Opus 4.5

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.

GPT-5.4

Proprietary

Closed source

Claude Opus 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Claude Opus 4.5 was released on 2025-11-24.

GPT-5.4 is 3 months newer than Claude Opus 4.5.

GPT-5.4

Mar 5, 2026

1 weeks ago

3mo newer

Claude Opus 4.5

Nov 24, 2025

3 months ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while GPT-5.4'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-5.4's cutoff date.

GPT-5.4

—

Claude Opus 4.5

Mar 2025

Provider Availability

GPT-5.4 is available from OpenAI. Claude Opus 4.5 is available from Anthropic. The availability of providers can affect quality of the model and reliability.