o4-mini Token Counter & Cost Calculator
Count tokens for o4-mini and estimate the exact API cost — $1.10
per 1M input tokens, $4.40 per 1M output tokens — using a real
o200k_base BPE tokenizer. Everything runs in your browser; nothing is uploaded.
o4-mini
Counts are exact for OpenAI models (o200k_base is GPT-4o/4.1/5's tokenizer). For Claude, Gemini and other vendors — whose tokenizers are not public — treat the count as a close estimate (typically within ±15%).
Cost of this text across popular models
| Model | Input $/1M | Output $/1M | This text (input) | +500 output tokens |
|---|---|---|---|---|
| GPT-6.1 Terra | 1.00 | 5.00 | $0 | $0 |
| Kimi K3.1 Pro | 2.00 | 10.00 | $0 | $0 |
| MiniMax-M3.1-Flash | 0.15 | 0.60 | $0 | $0 |
| DeepSeek V4.1 Flash 1017 | 0.15 | 0.60 | $0 | $0 |
| Mercury 3 | 0.10 | 0.35 | $0 | $0 |
| Gemini 4 Argon | 2.00 | 10.00 | $0 | $0 |
| Muse Wonder | 4.00 | 20.00 | $0 | $0 |
| Claude Haiku 5.5 | 0.10 | 0.50 | $0 | $0 |
Exact: o200k_base is OpenAI's own tokenizer, the same encoding its API bills o4-mini against.
Cost lookup — o4-mini
| Tokens | Cost on o4-mini |
|---|---|
| 1K input tokens | 0.11¢ |
| 10K input tokens | $0.0110 |
| 100K input tokens | $0.1100 |
| 1M input tokens | $1.10 |
| 1K output tokens | 0.44¢ |
| 10K output tokens | $0.0440 |
FAQ
How accurate is the o4-mini token count?
Exact: o200k_base is OpenAI's own tokenizer, the same encoding its API bills o4-mini against. Paste your own text above to see the exact number for your prompt.
How is o4-mini API cost calculated?
Cost = (input tokens ÷ 1,000,000) × $1.10 + (output tokens ÷ 1,000,000) × $4.40 — o4-mini's per-1M-token prices (OpenAI's official list price as recorded by models.dev).
See full o4-mini pricing & benchmarks, or the main token counter for every model.