GLM-4.5V vs GPT-5 Chat
GLM-4.5V comes out ahead, 48 to 31 on our weighted score, and it is the cheaper option too.
- Our pick
Z.ai (Zhipu)GLM-4.5V
48/100- ECI—
- Price$0.60 / $1.80
- Context64K
OpenAIGPT-5 Chat
31/100- ECI—
- Price$1.25 / $10.00
- Context400K
Add a model
Make it a three-way comparison.
GLM-4.5V is our pick
GLM-4.5V is the better all-round choice, scoring 48/100 against GPT-5 Chat (31). It leads on price and inputs & features. GPT-5 Chat wins on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceGLM-4.5VGLM-4.5V $0.90 · GPT-5 Chat $3.44 per 1M tokens (3:1 blend)
- Longest contextGPT-5 ChatGPT-5 Chat 400,000 · GLM-4.5V 64,000 tokens
- Widest inputsGLM-4.5VGLM-4.5V: Text, Images, Video · GPT-5 Chat: Text, Images
- Self-hostingGLM-4.5VPublishes downloadable weights
| Measure | Weight | GLM-4.5V | GPT-5 Chat |
|---|---|---|---|
| Price | 50% | 50 | 23 |
| Inputs & features | 30% | 70 | 35 |
| Context window | 20% | 12 | 44 |
| Overall | 100% | 48/100 | 31/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GLM-4.5VZ.ai (Zhipu) | GPT-5 ChatOpenAI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.60 (best) | $1.25 |
| Output | $1.80 (best) | $10.00 |
| Cached input | $0.11 | — |
| Blended (3:1) | $0.90 (best) | $3.44 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Z.AI API | Median of 5 providers |
| Limits | ||
| Context window | 64,000 tokens | 400,000 tokens (best) |
| Max output | 16,384 tokens | 128,000 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | Yes | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | No |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Proprietary |
| API model ID | glm-4.5v | — |
| API providers | 17 (best) | 5 |
| Released | Aug 11, 2025 | Aug 7, 2025 |
| Knowledge cutoff | Apr 2025 | Sep 30, 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GLM-4.5V$9.60
- GPT-5 Chat$32.50
Which should you choose?
Which is better: GLM-4.5V or GPT-5 Chat?
GLM-4.5V is the better all-round choice, scoring 48/100 against GPT-5 Chat (31). It leads on price and inputs & features. GPT-5 Chat wins on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, GLM-4.5V or GPT-5 Chat?
GLM-4.5V is cheaper at $0.60 input / $1.80 output per million tokens (official Z.AI API price). GPT-5 Chat costs $1.25 input / $10.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $0.90 per million tokens for GLM-4.5V versus $3.44 for GPT-5 Chat (3.8× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. GLM-4.5V has not been scored yet and GPT-5 Chat has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for GLM-4.5V and GPT-5 Chat yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that GPT-5 Chat does not support tool calling, which most coding agents need.
Which has the bigger context window?
GPT-5 Chat has the largest context window at 400,000 tokens, against 64,000 for GLM-4.5V. Maximum output per response: GLM-4.5V up to 16,384, GPT-5 Chat up to 128,000 tokens.
Which can read images, PDFs, audio or video?
GLM-4.5V accepts text, images and video; GPT-5 Chat accepts text and images. GLM-4.5V handles the widest range of inputs.
Are any of these open source?
GLM-4.5V publishes its weights and can be self-hosted; GPT-5 Chat is proprietary.
Which is newer?
GLM-4.5V is the newest, released Aug 11, 2025. GPT-5 Chat came out Aug 7, 2025. Knowledge cutoff: GLM-4.5V Apr 2025, GPT-5 Chat Sep 30, 2024.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
