AI model comparison
GLM 4.5V vs GPT-3.5 Turbo
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Z.ai
GLM 4.5V
GLM-4.5V is a vision-language foundation model for multimodal agent applications.
- Input / 1M
- $0.60
- Output / 1M
- $1.80
- Context
- 66K
OpenAI
GPT-3.5 Turbo
GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks.
- Input / 1M
- $0.50
- Output / 1M
- $1.50
- Context
- 16K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
GPT-3.5 Turbo
1.2x cheaper for a typical chat
Higher intelligence score
GLM 4.5V
7.6 vs 5.5 on Artificial Analysis
Larger context window
GLM 4.5V
66K vs 16K tokens
Newer release
GLM 4.5V
Released August 11, 2025
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-3.5 Turbo5.5Coding index
GPT-3.5 Turbo10.7Agentic index
GPT-3.5 TurboNot availablePricing
GLM 4.5V vs GPT-3.5 Turbo API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-3.5 Turbo | |
|---|---|---|
| Input tokensPer 1M tokens | $0.60 | $0.50 |
| Output tokensPer 1M tokens | $1.80 | $1.50 |
| Cached input (read)Per 1M tokens | $0.11 | Not available |
| Cache writePer 1M tokens | Not available | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
GPT-3.5 Turbo$1.75Coding task
30K in, 4K out
GPT-3.5 Turbo$21Long document summary
150K in, 2K out
GPT-3.5 Turbo$78Specs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | GPT-3.5 Turbo | |
|---|---|---|
| Context window | 66K tokens | 16K tokens |
| Max output | 16K tokens | 4K tokens |
| Input types | Image, Text | Text |
| Output types | Text | Text |
| Reasoning effort levels | Not available | Not available |
| Default reasoning effort | Not available | Not available |
| Release date | August 11, 2025 | May 28, 2023 |
Features
Supported features
API features available for each model.
| Metric | GPT-3.5 Turbo | |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Not supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Not supported |
| Temperature | Supported | Supported |
| Stop sequences | Supported | Supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
Our take
GPT-3.5 Turbo is 1.2x cheaper for a typical chat. GLM 4.5V scores higher on the Artificial Analysis Intelligence Index (7.6 vs 5.5). GLM 4.5V has the larger context window (66K vs 16K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is GLM 4.5V or GPT-3.5 Turbo cheaper?
GPT-3.5 Turbo is cheaper for a typical chat (2K input tokens and 500 output tokens). GPT-3.5 Turbo costs $0.50 per 1M input tokens and $1.50 per 1M output tokens, while GLM 4.5V costs $0.60 per 1M input tokens and $1.80 per 1M output tokens.
Which has a bigger context window, GLM 4.5V or GPT-3.5 Turbo?
GLM 4.5V supports up to 66K tokens of context, compared with 16K for GPT-3.5 Turbo.
Is GLM 4.5V smarter than GPT-3.5 Turbo?
On the Artificial Analysis Intelligence Index, GLM 4.5V scores 7.6 and GPT-3.5 Turbo scores 5.5, putting GLM 4.5V ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use GLM 4.5V and GPT-3.5 Turbo at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GLM 4.5V and GPT-3.5 Turbo answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GLM 4.5V and GPT-3.5 Turbo at the same time. Compare the answers side by side and keep the best one.