Model Comparison

GPT-5.1 vs GPT-5.1 HighWhich is better in 2026?

GPT-5.1 High has a slight edge in benchmark performance. GPT-5.1 and GPT-5.1 High cost the same.

Verdict: GPT-5.1 vs GPT-5.1 High — which is better?

GPT-5.1 (by OpenAI) and GPT-5.1 High (by OpenAI) 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-5.1 outperforms in 0 benchmarks, while GPT-5.1 High is better at 1 benchmark (AIME 2025). GPT-5.1 High has a slight edge in benchmark performance.

Choose GPT-5.1 if…

  • you want the most recent training data — it shipped Nov 2025

Choose GPT-5.1 High if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-5.1 outperforms in 0 benchmarks, while GPT-5.1 High is better at 1 benchmark (AIME 2025).

GPT-5.1 High has a slight edge in benchmark performance.

Thu Jul 23 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

For input processing, GPT-5.1 ($1.25/1M tokens) costs the same as GPT-5.1 High ($1.25/1M tokens).

For output processing, GPT-5.1 ($10.00/1M tokens) costs the same as GPT-5.1 High ($10.00/1M tokens).

In conclusion, GPT-5.1 and GPT-5.1 High cost the same.*

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

Lowest available price from all providers
Thu Jul 23 2026 • llm-stats.com
OpenAI
GPT-5.1
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
OpenAI
GPT-5.1 High
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
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 400,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-5.1
Input400,000 tokens
Output128,000 tokens
OpenAI
GPT-5.1 High
Input400,000 tokens
Output128,000 tokens
Thu Jul 23 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.1 and GPT-5.1 High support multimodal inputs.

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

GPT-5.1

Text
Images
Audio
Video

GPT-5.1 High

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-5.1

Proprietary

Closed source

GPT-5.1 High

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.1 was released on 2025-11-13, while GPT-5.1 High was released on 2025-11-12.

GPT-5.1 is 0 month newer than GPT-5.1 High.

GPT-5.1

Nov 13, 2025

8 months ago

1d newer
GPT-5.1 High

Nov 12, 2025

8 months ago

Knowledge Cutoff

When training data ends

GPT-5.1 has a documented knowledge cutoff of 2024-09-30, while GPT-5.1 High's cutoff date is not specified.

We can confirm GPT-5.1's training data extends to 2024-09-30, but cannot make a direct comparison without GPT-5.1 High's cutoff date.

GPT-5.1

Sep 2024

GPT-5.1 High

—

Provider Availability

GPT-5.1 is available from OpenAI. GPT-5.1 High is available from OpenAI.

GPT-5.1

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

GPT-5.1 High

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI

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

OpenAI
Higher AIME 2025 score (99.6% vs 94.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.1 and GPT-5.1 High side-by-side, then vote on the output you prefer.

GPT-5.1
✓ Preferred
GPT-5.1 High
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.1
OpenAI
GPT-5.1 High

FAQ

Common questions about GPT-5.1 vs GPT-5.1 High.

Which is better, GPT-5.1 or GPT-5.1 High?

GPT-5.1 High has a slight edge in benchmark performance. GPT-5.1 is made by OpenAI and GPT-5.1 High is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.1 compare to GPT-5.1 High in benchmarks?

GPT-5.1 scores Tau2 Telecom: 95.6%, AIME 2025: 94.0%, BrowseComp Long Context 128k: 90.0%, GPQA: 88.1%, MMMU: 85.4%. GPT-5.1 High scores AIME 2025: 99.6%, GPQA: 88.1%, LiveBench: 72.0%.

Is GPT-5.1 cheaper than GPT-5.1 High?

Both models cost $1.25 per million input tokens.

What are the context window sizes for GPT-5.1 and GPT-5.1 High?

GPT-5.1 supports 400K tokens and GPT-5.1 High supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

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