Model Comparison

GPT-5 High vs GLM-4.6Which is better in 2026?

GPT-5 High significantly outperforms across most benchmarks. GLM-4.6 is 3.8x cheaper per token.

Verdict: GPT-5 High vs GLM-4.6 — which is better?

GPT-5 High (by OpenAI) and GLM-4.6 (by Zhipu AI) 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 High outperforms in 2 benchmarks (AIME 2025, GPQA), while GLM-4.6 is better at 0 benchmarks. GPT-5 High significantly outperforms across most benchmarks.

On price, GLM-4.6 is roughly 3.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5 High also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5 High if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 400,000 token context window

Choose GLM-4.6 if…

  • cost matters — it's about 3.8x cheaper per token
  • you want the most recent training data — it shipped Sep 2025
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-5 High outperforms in 2 benchmarks (AIME 2025, GPQA), while GLM-4.6 is better at 0 benchmarks.

GPT-5 High significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GLM-4.6 costs less

For input processing, GPT-5 High ($1.25/1M tokens) is 2.3x more expensive than GLM-4.6 ($0.55/1M tokens).

For output processing, GPT-5 High ($10.00/1M tokens) is 5.0x more expensive than GLM-4.6 ($2.00/1M tokens).

In conclusion, GPT-5 High is more expensive than GLM-4.6.*

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
OpenAI
GPT-5 High
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
Zhipu AI
GLM-4.6
Input tokens$0.55
Output tokens$2.00
Best providerFireworks
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5 High accepts 400,000 input tokens compared to GLM-4.6's 131,072 tokens. GLM-4.6 can generate longer responses up to 131,072 tokens, while GPT-5 High is limited to 128,000 tokens.

OpenAI
GPT-5 High
Input400,000 tokens
Output128,000 tokens
Zhipu AI
GLM-4.6
Input131,072 tokens
Output131,072 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5 High and GLM-4.6 support multimodal inputs.

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

GPT-5 High

Text
Images
Audio
Video

GLM-4.6

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5 High is licensed under a proprietary license, while GLM-4.6 uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

GPT-5 High

Proprietary

Closed source

GLM-4.6

MIT

Open weights

Release Timeline

When each model was launched

GPT-5 High was released on 2025-08-07, while GLM-4.6 was released on 2025-09-30.

GLM-4.6 is 2 months newer than GPT-5 High.

GPT-5 High

Aug 7, 2025

11 months ago

GLM-4.6

Sep 30, 2025

9 months ago

1mo newer

Knowledge Cutoff

When training data ends

GPT-5 High has a documented knowledge cutoff of 2024-09-30, while GLM-4.6'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 GLM-4.6's cutoff date.

GPT-5 High

Sep 2024

GLM-4.6

—

Provider Availability

GPT-5 High is available from OpenAI. GLM-4.6 is available from Fireworks, DeepInfra.

GPT-5 High

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

GLM-4.6

fireworks logo
Fireworks
Input Price:Input: $0.55/1MOutput Price:Output: $2.19/1M
deepinfra logo
Deepinfra
Input Price:Input: $0.60/1MOutput Price:Output: $2.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Higher AIME 2025 score (94.6% vs 93.9%)
Higher GPQA score (87.3% vs 81.0%)
Zhipu AI
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5 High and GLM-4.6 side-by-side, then vote on the output you prefer.

GPT-5 High
✓ Preferred
GLM-4.6
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5 High
Zhipu AI
GLM-4.6

FAQ

Common questions about GPT-5 High vs GLM-4.6.

Which is better, GPT-5 High or GLM-4.6?

GPT-5 High significantly outperforms across most benchmarks. GPT-5 High is made by OpenAI and GLM-4.6 is made by Zhipu AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5 High compare to GLM-4.6 in benchmarks?

GPT-5 High scores AIME 2025: 94.6%, GPQA: 87.3%. GLM-4.6 scores AIME 2025: 93.9%, LiveCodeBench v6: 82.8%, GPQA: 81.0%, SWE-Bench Verified: 68.0%, BrowseComp: 45.1%.

Is GPT-5 High cheaper than GLM-4.6?

GLM-4.6 is 2.3x cheaper for input tokens. GPT-5 High costs $1.25/M input and $10.00/M output via openai. GLM-4.6 costs $0.55/M input and $2.00/M output via fireworks.

What are the context window sizes for GPT-5 High and GLM-4.6?

GPT-5 High supports 400K tokens and GLM-4.6 supports 131K 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 GLM-4.6?

Key differences include context window (400K vs 131K), input pricing ($1.25 vs $0.55/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5 High and GLM-4.6?

GPT-5 High is developed by OpenAI and GLM-4.6 is developed by Zhipu AI.

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