Model Comparison

GPT-5 High vs GPT-4o

GPT-5 High significantly outperforms across most benchmarks. GPT-5 High is 1.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-5 High outperforms in 1 benchmarks (GPQA), while GPT-4o is better at 0 benchmarks.

GPT-5 High significantly outperforms across most benchmarks.

Mon Jun 01 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 High costs less

For input processing, GPT-5 High ($1.25/1M tokens) is 2.0x cheaper than GPT-4o ($2.50/1M tokens).

For output processing, GPT-5 High ($10.00/1M tokens) costs the same as GPT-4o ($10.00/1M tokens).

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

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

Lowest available price from all providers
Mon Jun 01 2026 • llm-stats.com
OpenAI
GPT-5 High
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
OpenAI
GPT-4o
Input tokens$2.50
Output tokens$10.00
Best providerAzure
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Context Window

Maximum input and output token capacity

GPT-5 High accepts 400,000 input tokens compared to GPT-4o's 128,000 tokens. GPT-5 High can generate longer responses up to 128,000 tokens, while GPT-4o is limited to 16,384 tokens.

OpenAI
GPT-5 High
Input400,000 tokens
Output128,000 tokens
OpenAI
GPT-4o
Input128,000 tokens
Output16,384 tokens
Mon Jun 01 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5 High and GPT-4o support multimodal inputs.

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

GPT-5 High

Text
Images
Audio
Video

GPT-4o

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 High

Proprietary

Closed source

GPT-4o

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5 High was released on 2025-08-07, while GPT-4o was released on 2024-08-06.

GPT-5 High is 12 months newer than GPT-4o.

GPT-5 High

Aug 7, 2025

9 months ago

1.0yr newer
GPT-4o

Aug 6, 2024

1.8 years ago

Knowledge Cutoff

When training data ends

GPT-5 High has a documented knowledge cutoff of 2024-09-30, while GPT-4o'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 GPT-4o's cutoff date.

GPT-5 High

Sep 2024

GPT-4o

—

Provider Availability

GPT-5 High is available from OpenAI. GPT-4o is available from Azure, OpenAI.

GPT-5 High

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M

GPT-4o

azure logo
Azure
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Less expensive input tokens
Higher GPQA score (87.3% vs 70.1%)
OpenAI

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

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5 High
OpenAI
GPT-4o

FAQ

Common questions about GPT-5 High vs GPT-4o.

Which is better, GPT-5 High or GPT-4o?

GPT-5 High significantly outperforms across most benchmarks. GPT-5 High is made by OpenAI and GPT-4o is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5 High compare to GPT-4o in benchmarks?

GPT-5 High scores AIME 2025: 94.6%, GPQA: 87.3%. GPT-4o scores AI2D: 94.2%, DocVQA: 92.8%, ChartQA: 85.7%, MMLU: 85.7%, CharXiv-D: 85.3%.

Is GPT-5 High cheaper than GPT-4o?

GPT-5 High is 2.0x cheaper for input tokens. GPT-5 High costs $1.25/M input and $10.00/M output via openai. GPT-4o costs $2.50/M input and $10.00/M output via azure.

What are the context window sizes for GPT-5 High and GPT-4o?

GPT-5 High supports 400K tokens and GPT-4o supports 128K 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 High and GPT-4o?

Key differences include context window (400K vs 128K), input pricing ($1.25 vs $2.50/M). See the full comparison above for benchmark-by-benchmark results.