AI price per Thai text

API prices are quoted per token, but every vendor splits Thai into a different number of tokens. This table converts them into a price per Thai character so they compare directly.

Prices from OpenRouter as of 2026-10-21 · 1 USD = 33.575 THB (2026-10-21)

Characters sent / request Characters answered / request Requests / month THB per USD

Model	Send 1M chars	Answer 1M chars	Per month	Thai vs English
Qwen3.7 Flash	THB 0.2831	THB 1.23	THB 1.79	1.20×
DeepSeek V4.1 Flash≈	THB 0.3974	THB 1.59	THB 2.38	1.57×
DeepSeek V4 Flash≈	THB 1.06	THB 2.12	THB 4.23	1.57×
Llama 4 Scout≈	THB 1.03	THB 3.10	THB 5.17	1.43×
GPT-5 nano	THB 0.6164	THB 4.93	THB 6.16	1.67×
Gemini 2.5 Flash-Lite≈	THB 1.13	THB 4.54	THB 6.81	1.40×
Llama 3.3 70B≈	THB 1.34	THB 4.29	THB 6.98	1.83×
Qwen3.8 Flash	THB 1.42	THB 4.44	THB 7.27	1.20×
Qwen3 30B-A3B	THB 1.42	THB 4.73	THB 7.57	1.99×
GPT-6 Luna	THB 1.23	THB 6.16	THB 8.63	1.67×
Llama 4 Maverick≈	THB 1.94	THB 6.74	THB 10.62	1.43×
Qwen3.6 35B-A3B	THB 0.9438	THB 8.97	THB 10.85	1.20×
GPT-4o mini	THB 1.85	THB 7.40	THB 11.10	1.67×
Qwen3 235B-A22B	THB 1.42	THB 8.68	THB 11.51	1.99×
Qwen3.8 27B	THB 0.3775	THB 12.74	THB 13.50	1.20×
DeepSeek V4 Pro≈	THB 4.46	THB 8.91	THB 17.83	1.57×
Qwen3.7 Plus	THB 3.02	THB 12.08	THB 18.12	1.20×
GLM-5.3 Flash≈	THB 3.41	THB 11.37	THB 18.19	3.03×
GPT-5.6 Luna	THB 2.47	THB 14.79	THB 19.73	1.67×
GPT-4.1 mini	THB 4.93	THB 19.73	THB 29.59	1.67×
Amazon Nova 2 Lite≈	THB 3.27	THB 27.26	THB 33.80	1.53×
Gemini 3.5 Flash-Lite≈	THB 3.40	THB 28.36	THB 35.16	1.40×
MiniMax M2.7≈	THB 7.51	THB 30.06	THB 45.08	3.47×
MiniMax M3≈	THB 7.51	THB 30.06	THB 45.08	3.47×
Gemini 3.7 Flash≈	THB 8.51	THB 42.53	THB 59.55	1.40×
Gemini 3.8 Flash≈	THB 9.36	THB 46.79	THB 65.50	1.40×
Qwen3.7 Max	THB 13.92	THB 41.76	THB 69.60	1.20×
Kimi K2.5≈	THB 9.95	THB 49.74	THB 69.63	2.73×
GPT-5.4 mini	THB 9.25	THB 55.48	THB 73.97	1.67×
GLM-5.3≈	THB 15.92	THB 50.02	THB 81.85	3.03×
Kimi K2.6≈	THB 12.93	THB 67.84	THB 93.70	2.73×
Qwen3.8 Max	THB 18.88	THB 56.63	THB 94.38	1.20×
Grok 4.6≈	THB 22.05	THB 66.15	THB 110.24	1.44×
Grok 4.7≈	THB 22.05	THB 66.15	THB 110.24	1.44×
Claude Haiku 4.5≈	THB 23.10	THB 115.52	THB 161.73	2.73×
Mistral Medium 3.5≈	THB 23.17	THB 115.84	THB 162.18	1.96×
GPT-6 Sol	THB 24.66	THB 123.29	THB 172.60	1.67×
Gemini 3.1 Pro≈	THB 22.68	THB 136.11	THB 181.48	1.40×
GPT-5.6 Terra	THB 24.66	THB 147.94	THB 197.26	1.67×
Kimi K3≈	THB 4.71	THB 235.39	THB 244.82	2.76×
Claude Sonnet 5≈	THB 49.15	THB 245.75	THB 344.05	2.03×
GPT-5.6 Sol	THB 49.31	THB 246.57	THB 345.20	1.67×
GPT-5.5	THB 61.64	THB 369.86	THB 493.15	1.67×
Claude Opus 5.5≈	THB 98.30	THB 491.50	THB 688.10	2.03×
Claude Opus 5≈	THB 122.87	THB 614.37	THB 860.12	2.03×
GPT-6 Astra	THB 123.29	THB 616.44	THB 863.01	1.67×
Claude Fable 5≈	THB 245.75	THB 1,228.74	THB 1,720.24	2.03×
Claude Fable 5.1≈	THB 245.75	THB 1,228.74	THB 1,720.24	2.03×

≈ = estimated from ratios measured through OpenRouter (see the token counter)

Cheapest per token ≠ cheapest per Thai text

Today the cheapest model per token (Qwen3.7 Flash) is also the cheapest per Thai text, but the rest of the order changes once you count characters.

Why Thai costs more

The same article costs 1.67× the tokens in Thai as in English on GPT; across vendors the range is 1.20–3.47×. The last column shows each model’s figure.

How it is calculated

Price per million characters = that model’s Thai tokens per character × its price per million tokens (a million characters is about 120 news articles). Input and output use the same rate — it is the same tokenizer.
Thai tokens per character were measured on 109 real Thai articles on this site (tech news with English terms mixed in). GPT, Qwen and Typhoon use their real tokenizers; the others were measured through OpenRouter.
Prices come from OpenRouter and the exchange rate from Frankfurter on every site rebuild (daily). Cache and batch discounts and other providers’ prices are not included.