# GPT vs GLM: API prices compared, dated and sourced

Canonical page: https://bertrande.com/en/vs/gpt-vs-glm/
License: CC-BY-4.0, reuse with attribution and a link.

No value below was produced, estimated or completed by a language model. Every figure was read from a source we name, on the date we give.

The cheapest GPT model we track, gpt-5-nano, costs $0.400 per million output tokens and $0.050 per million input tokens. The cheapest GLM model, GLM-OCR, costs $0.030 per million output tokens and $0.030 per million input tokens. At the entry level, GLM is 13.3 times cheaper than GPT on output tokens. Prices read on 11 September 2026 and 18 September 2026.

## GPT models

| Model | Input $/1M | Output $/1M | Read on |
|---|---|---|---|
| gpt-5-nano | $0.050 | $0.400 | 2026-09-18 |
| gpt-4.1-nano | $0.100 | $0.400 | 2026-09-18 |
| gpt-4o-mini | $0.150 | $0.600 | 2026-09-18 |
| gpt-5.6-luna | $0.200 | $1.20 | 2026-09-18 |
| gpt-5.4-nano | $0.200 | $1.25 | 2026-09-18 |
| gpt-3.5-turbo | $0.500 | $1.50 | 2026-09-18 |
| gpt-3.5-turbo-0125 | $0.500 | $1.50 | 2026-09-18 |
| gpt-4.1-mini | $0.400 | $1.60 | 2026-09-18 |
| gpt-5-mini | $0.250 | $2.00 | 2026-09-18 |
| gpt-3.5-turbo-1106 | $1.00 | $2.00 | 2026-09-18 |
| gpt-3.5-turbo-instruct | $1.50 | $2.00 | 2026-09-18 |
| o3-mini | $1.10 | $4.40 | 2026-09-18 |
| o4-mini | $1.10 | $4.40 | 2026-09-18 |
| gpt-5.4-mini | $0.750 | $4.50 | 2026-09-18 |
| gpt-4.1 | $2.00 | $8.00 | 2026-09-18 |
| o3 | $2.00 | $8.00 | 2026-09-18 |
| gpt-5 | $1.25 | $10.00 | 2026-09-18 |
| gpt-5.1 | $1.25 | $10.00 | 2026-09-18 |
| gpt-4o | $2.50 | $10.00 | 2026-09-18 |
| gpt-5.6-terra | $2.00 | $12.00 | 2026-09-18 |
| gpt-5.2 | $1.75 | $14.00 | 2026-09-18 |
| gpt-5.4 (<272K context length) | $2.50 | $15.00 | 2026-09-18 |
| gpt-4o-2024-05-13 | $5.00 | $15.00 | 2026-09-18 |
| gpt-5.6-sol | $4.00 | $20.00 | 2026-09-18 |
| gpt-5.5 (<272K context length) | $5.00 | $30.00 | 2026-09-18 |
| gpt-4-turbo-2024-04-09 | $10.00 | $30.00 | 2026-09-18 |
| gpt-6-astra | $10.00 | $50.00 | 2026-09-18 |
| o1 | $15.00 | $60.00 | 2026-09-18 |
| gpt-4-0613 | $30.00 | $60.00 | 2026-09-18 |
| o3-pro | $20.00 | $80.00 | 2026-09-18 |
| gpt-5-pro | $15.00 | $120 | 2026-09-18 |
| gpt-5.2-pro | $21.00 | $168 | 2026-09-18 |
| gpt-5.4-pro (<272K context length) | $30.00 | $180 | 2026-09-18 |
| gpt-5.5-pro (<272K context length) | $30.00 | $180 | 2026-09-18 |
| o1-pro | $150 | $600 | 2026-09-18 |

## GLM models

| Model | Input $/1M | Output $/1M | Read on |
|---|---|---|---|
| GLM-OCR | $0.030 | $0.030 | 2026-09-11 |
| GLM-4-32B-0414-128K | $0.100 | $0.100 | 2026-09-11 |
| GLM-4.6V-FlashX | $0.040 | $0.400 | 2026-09-11 |
| GLM-4.7-FlashX | $0.070 | $0.400 | 2026-09-11 |
| GLM-5.3-Flash | $0.150 | $0.500 | 2026-09-18 |
| GLM-4.6V | $0.300 | $0.900 | 2026-09-18 |
| GLM-4.5-Air | $0.200 | $1.10 | 2026-09-18 |
| GLM-4.5V | $0.600 | $1.80 | 2026-09-18 |
| GLM-4.5 | $0.600 | $2.20 | 2026-09-16 |
| GLM-4.6 | $0.600 | $2.20 | 2026-09-18 |
| GLM-4.7 | $0.600 | $2.20 | 2026-09-11 |
| GLM-5 | $1.00 | $3.20 | 2026-09-18 |
| GLM-5.1 | $1.40 | $4.40 | 2026-09-15 |
| GLM-5.2 | $1.40 | $4.40 | 2026-09-18 |
| GLM-5.3 | $1.40 | $4.40 | 2026-09-18 |
| GLM-4.5-AirX | $1.10 | $4.50 | 2026-09-11 |
| GLM-4.5-X | $2.20 | $8.90 | 2026-09-11 |


Method: https://bertrande.com/en/methodology/
Report an error: https://bertrande.com/en/corrections/