Model Comparison

GPT-5.4 vs Claude Opus 4.8Which is better in 2026?

Claude Opus 4.8 significantly outperforms across most benchmarks. GPT-5.4 is 1.8x cheaper per token.

Verdict: GPT-5.4 vs Claude Opus 4.8 — which is better?

GPT-5.4 (by OpenAI) and Claude Opus 4.8 (by Anthropic) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

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.

On price, GPT-5.4 is roughly 1.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose GPT-5.4 if…

  • cost matters — it's about 1.8x cheaper per token

Choose Claude Opus 4.8 if…

  • you want the strongest raw capability — it leads on 9 of 11 shared benchmarks
  • you want the most recent training data — it shipped May 2026
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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.

Tue Jun 09 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
Tue Jun 09 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
Anthropic
Claude Opus 4.8
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

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

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
Anthropic
Claude Opus 4.8
Input1,000,000 tokens
Output128,000 tokens
Tue Jun 09 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

3 months ago

Claude Opus 4.8

May 28, 2026

1 weeks 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, Vertex AI.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Claude Opus 4.8

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M
vertex logo
Unknown Organization
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

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%)
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
OpenAI
GPT-5.4
Anthropic
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.

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