GLM-4.5 vs GPT-6.1 Sol
GPT-6.1 Sol leads the LLM Stats Score 52.0 to 27.7. GLM-4.5 is 5.7x cheaper per token.
Zhipu AI · OpenAI · Updated for 2026
Which is better?
GPT-6.1 Sol leads the overall LLM Stats Score 52.0 to 27.7, ranking #11 overall.
On price, GLM-4.5 is roughly 5.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-6.1 Sol also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GLM-4.5
- cost matters — it's about 5.7x cheaper per token
- you need open weights you can self-host or fine-tune
Choose GPT-6.1 Sol
- overall performance matters — it scores 52.0 and ranks #11 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Sep 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
14 reported for GLM-4.5 · 10 for GPT-6.1 Sol
GLM-4.5 and GPT-6.1 Soldon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GLM-4.5 ($0.40/1M tokens) is 5.0x cheaper than GPT-6.1 Sol ($2.00/1M tokens).
For output processing, GLM-4.5 ($1.60/1M tokens) is 6.3x cheaper than GPT-6.1 Sol ($10.00/1M tokens).
In conclusion, GPT-6.1 Sol is more expensive than GLM-4.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-6.1 Sol accepts 1,050,000 input tokens compared to GLM-4.5's 131,072 tokens. GLM-4.5 can generate longer responses up to 131,072 tokens, while GPT-6.1 Sol is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
GPT-6.1 Sol supports multimodal inputs, whereas GLM-4.5 does not.
GPT-6.1 Sol can handle both text and other forms of data like images, making it suitable for multimodal applications.
GLM-4.5
GPT-6.1 Sol
License
Usage and distribution terms
GLM-4.5 is licensed under MIT, while GPT-6.1 Sol uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
GLM-4.5 was released on 2025-07-28, while GPT-6.1 Sol was released on 2026-09-29.
GPT-6.1 Sol is 14 months newer than GLM-4.5.
Jul 28, 2025
1.2 years ago
Sep 29, 2026
1 days ago
1.2yr newerKnowledge Cutoff
When training data ends
GPT-6.1 Sol has a documented knowledge cutoff of 2026-04-30, while GLM-4.5's cutoff date is not specified.
We can confirm GPT-6.1 Sol's training data extends to 2026-04-30, but cannot make a direct comparison without GLM-4.5's cutoff date.
—
Apr 2026
Provider Availability
GLM-4.5 is available from DeepInfra, Fireworks, Novita. GPT-6.1 Sol is available from OpenAI.
GLM-4.5
GPT-6.1 Sol
Outputs Comparison
Judge for yourself.
Run your own prompts against GLM-4.5 and GPT-6.1 Sol side-by-side, then vote on the output you prefer.
FAQ
Common questions about GLM-4.5 vs GPT-6.1 Sol.