Model Comparison

GPT-5.4 vs Claude Opus 4.5

Q: Is GPT-5.4 cheaper than Claude Opus 4.5?

GPT-5.4 is 2.0x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic.

Q: What are the context window sizes for GPT-5.4 and Claude Opus 4.5?

GPT-5.4 supports 1.0M tokens and Claude Opus 4.5 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Q: What are the main differences between GPT-5.4 and Claude Opus 4.5?

Key differences include context window (1.0M vs 200K), input pricing ($2.50 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

Q: Who makes GPT-5.4 and Claude Opus 4.5?

GPT-5.4 is developed by OpenAI and Claude Opus 4.5 is developed by Anthropic.

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is 1.8x cheaper per token.

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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.

Sat May 02 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

Sat May 02 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

Notice missing or incorrect data?Start an Issue→

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

Sat May 02 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 months ago

3mo newer

Claude Opus 4.5

Nov 24, 2025

5 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.

GPT-5.4

OpenAI

Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Claude Opus 4.5

Anthropic

Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

GPT-5.4

View details

OpenAI

Larger context window (1,000,000 tokens)

Less expensive input tokens

Less expensive output tokens

Higher ARC-AGI v2 score (73.3% vs 37.6%)

Higher GPQA score (92.8% vs 87.0%)

Higher MCP Atlas score (67.2% vs 62.3%)

Higher Tau2 Telecom score (98.9% vs 98.2%)

Higher Terminal-Bench 2.0 score (75.1% vs 59.3%)

Claude Opus 4.5

View details

Anthropic

No standout differentiators in the data we have for this pair.

Detailed Comparison

AI Model Comparison Table
Feature	GPT-5.4	Claude Opus 4.5

FAQ

Common questions about GPT-5.4 vs Claude Opus 4.5.

Which is better, GPT-5.4 or Claude Opus 4.5?

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and Claude Opus 4.5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.4 compare to Claude Opus 4.5 in benchmarks?

GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%. Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%.

Is GPT-5.4 cheaper than Claude Opus 4.5?

GPT-5.4 is 2.0x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic.

What are the context window sizes for GPT-5.4 and Claude Opus 4.5?

GPT-5.4 supports 1.0M tokens and Claude Opus 4.5 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5.4 and Claude Opus 4.5?

Key differences include context window (1.0M vs 200K), input pricing ($2.50 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.4 and Claude Opus 4.5?

GPT-5.4 is developed by OpenAI and Claude Opus 4.5 is developed by Anthropic.