Model Comparison
GPT-5.4 vs GLM-4.6Which is better in 2026?
GPT-5.4 significantly outperforms across most benchmarks. GLM-4.6 is 6.2x cheaper per token.
Verdict: GPT-5.4 vs GLM-4.6 — which is better?
GPT-5.4 (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-5.4 outperforms in 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam), while GLM-4.6 is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.
On price, GLM-4.6 is roughly 6.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.4 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose GPT-5.4 if…
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Mar 2026
Choose GLM-4.6 if…
- cost matters — it's about 6.2x cheaper per token
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.4 outperforms in 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam), while GLM-4.6 is better at 0 benchmarks.
GPT-5.4 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.4 ($2.50/1M tokens) is 4.5x more expensive than GLM-4.6 ($0.55/1M tokens).
For output processing, GPT-5.4 ($15.00/1M tokens) is 7.5x more expensive than GLM-4.6 ($2.00/1M tokens).
In conclusion, GPT-5.4 is more expensive than GLM-4.6.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.4 accepts 1,000,000 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-5.4 is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.4 and GLM-4.6 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.4
GLM-4.6
License
Usage and distribution terms
GPT-5.4 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.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
GPT-5.4 was released on 2026-03-05, while GLM-4.6 was released on 2025-09-30.
GPT-5.4 is 5 months newer than GLM-4.6.
Mar 5, 2026
3 months ago
5mo newerSep 30, 2025
8 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.4 is available from OpenAI. GLM-4.6 is available from Fireworks, DeepInfra.
GPT-5.4
GLM-4.6
Outputs Comparison
Key Takeaways
GPT-5.4
View detailsOpenAI
GLM-4.6
View detailsZhipu AI
Detailed Comparison
FAQ
Common questions about GPT-5.4 vs GLM-4.6.