Model Comparison

GPT-5.4 vs Claude Opus 4.8

Q: Is GPT-5.4 cheaper than Claude Opus 4.8?

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 4.8 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 4.8?

GPT-5.4 supports 1.0M tokens and Claude Opus 4.8 supports 1.0M 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 4.8?

Key differences include 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 4.8?

GPT-5.4 is developed by OpenAI and Claude Opus 4.8 is developed by Anthropic.

Claude Opus 4.8 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

11 benchmarks

GPT-5.4 outperforms in 2 benchmarks (Finance Agent, Terminal-Bench 2.0), while Claude Opus 4.8 is better at 9 benchmarks (BrowseComp, GPQA, Graphwalks BFS >128k, Graphwalks parents >128k, Humanity's Last Exam, MCP Atlas, OSWorld-Verified, SWE-Bench Pro, Toolathlon).

Claude Opus 4.8 significantly outperforms across most benchmarks.

Thu May 28 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 4.8 ($5.00/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 1.7x cheaper than Claude Opus 4.8 ($25.00/1M tokens).

In conclusion, Claude Opus 4.8 is more expensive than GPT-5.4.*

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

Lowest available price from all providers

Thu May 28 2026 • llm-stats.com

GPT-5.4

Input tokens$2.50

Output tokens$15.00

Best providerOpenAI

Claude Opus 4.8

Input tokens$5.00

Output tokens$25.00

Best providerAnthropic

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Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Both models can generate responses up to 128,000 tokens.

GPT-5.4

Input1,000,000 tokens

Output128,000 tokens

Claude Opus 4.8

Input1,000,000 tokens

Output128,000 tokens

Thu May 28 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and Claude Opus 4.8 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 4.8

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 4.8

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Claude Opus 4.8 was released on 2026-05-28.

Claude Opus 4.8 is 3 months newer than GPT-5.4.

GPT-5.4

Mar 5, 2026

2 months ago

Claude Opus 4.8

May 28, 2026

0 days ago

2mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

GPT-5.4 is available from OpenAI. Claude Opus 4.8 is available from Anthropic.

GPT-5.4

OpenAI

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

Claude Opus 4.8

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

Less expensive input tokens

Less expensive output tokens

Higher Finance Agent score (56.0% vs 53.9%)

Higher Terminal-Bench 2.0 score (75.1% vs 74.6%)

Claude Opus 4.8

View details

Anthropic

Higher BrowseComp score (84.3% vs 82.7%)

Higher GPQA score (93.6% vs 92.8%)

Higher Graphwalks BFS >128k score (68.1% vs 21.4%)

Higher Graphwalks parents >128k score (83.3% vs 32.4%)

Higher Humanity's Last Exam score (57.9% vs 39.8%)

Higher MCP Atlas score (82.2% vs 67.2%)

Higher OSWorld-Verified score (83.4% vs 75.0%)

Higher SWE-Bench Pro score (69.2% vs 57.7%)

Higher Toolathlon score (59.9% vs 54.6%)

Detailed Comparison

AI Model Comparison Table
Feature	GPT-5.4	Claude Opus 4.8

FAQ

Common questions about GPT-5.4 vs Claude Opus 4.8.

Which is better, GPT-5.4 or Claude Opus 4.8?

Claude Opus 4.8 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and Claude Opus 4.8 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 4.8 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 4.8 scores GPQA: 93.6%, DeepSearchQA: 93.1%, CharXiv-R: 89.9%, SWE-Bench Verified: 88.6%, ScreenSpot Pro: 87.9%.

Is GPT-5.4 cheaper than Claude Opus 4.8?

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 4.8 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 4.8?

GPT-5.4 supports 1.0M tokens and Claude Opus 4.8 supports 1.0M 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 4.8?

Key differences include 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 4.8?

GPT-5.4 is developed by OpenAI and Claude Opus 4.8 is developed by Anthropic.