Model Comparison
GPT-5.4 vs GLM-5.2Which is better in 2026?
GLM-5.2 has a slight edge in benchmark performance. GLM-5.2 is 2.6x cheaper per token.
Verdict: GPT-5.4 vs GLM-5.2 — which is better?
GPT-5.4 (by OpenAI) and GLM-5.2 (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 2 benchmarks (GPQA, Toolathlon), while GLM-5.2 is better at 3 benchmarks (Humanity's Last Exam, MCP Atlas, SWE-Bench Pro). GLM-5.2 has a slight edge in benchmark performance.
On price, GLM-5.2 is roughly 2.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Choose GPT-5.4 if…
- you want predictable pricing at $2.50/M input and $15.00/M output
Choose GLM-5.2 if…
- you want the strongest raw capability — it leads on 3 of 5 shared benchmarks
- cost matters — it's about 2.6x cheaper per token
- you want the most recent training data — it shipped Jun 2026
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.4 outperforms in 2 benchmarks (GPQA, Toolathlon), while GLM-5.2 is better at 3 benchmarks (Humanity's Last Exam, MCP Atlas, SWE-Bench Pro).
GLM-5.2 has a slight edge in benchmark performance.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.4 ($2.50/1M tokens) is 1.8x more expensive than GLM-5.2 ($1.40/1M tokens).
For output processing, GPT-5.4 ($15.00/1M tokens) is 3.4x more expensive than GLM-5.2 ($4.40/1M tokens).
In conclusion, GPT-5.4 is more expensive than GLM-5.2.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,000,000 tokens. GLM-5.2 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
GPT-5.4 supports multimodal inputs, whereas GLM-5.2 does not.
GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.4
GLM-5.2
License
Usage and distribution terms
GPT-5.4 is licensed under a proprietary license, while GLM-5.2 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-5.2 was released on 2026-06-16.
GLM-5.2 is 3 months newer than GPT-5.4.
Mar 5, 2026
3 months ago
Jun 16, 2026
0 days ago
3mo newerKnowledge 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-5.2 is available from FriendliAI, Novita, ZAI.
GPT-5.4
GLM-5.2
Outputs Comparison
Key Takeaways
GPT-5.4
View detailsOpenAI
GLM-5.2
View detailsZhipu AI
Detailed Comparison
FAQ
Common questions about GPT-5.4 vs GLM-5.2.