OpenAI API pricing
GPT-6 and GPT-5.x families. 13 models priced per 1,000,000 tokens, verified October 2026. Cheapest: GPT-6 Luna at $0.10 input. Most expensive: GPT-6 Astra at $50 output.
OpenAI price table
| Model | Input | Cached | Cache write | Output | Context | Batch |
|---|---|---|---|---|---|---|
| GPT-6 Luna | $0.10 | $0.01 | $0.125 | $0.50 | 1,050,000 | Yes |
| GPT-5.6 Luna | $0.20 | $0.02 | $0.25 | $1.20 | 1,050,000 | Yes |
| GPT-5.4 nano | $0.20 | $0.02 | — | $1.25 | 400,000 | Yes |
| GPT-5.4 mini | $0.75 | $0.075 | — | $4.50 | 400,000 | Yes |
| GPT-4.1 | $2 | $0.50 | — | $8 | 1,047,576 | Yes |
| GPT-6.1 Sol | $2 | $0.10 | $2.50 | $10 | 1,050,000 | Yes |
| GPT-6 Sol | $2 | $0.20 | $2.50 | $10 | 1,050,000 | Yes |
| GPT-5.6 Terra | $2 | $0.20 | $2.50 | $12 | 1,050,000 | Yes |
| GPT-5.2 | $1.75 | $0.175 | — | $14 | 400,000 | Yes |
| GPT-5.4 | $2.50 | $0.25 | — | $15 | 1,050,000 | Yes |
| GPT-5.6 Sol promo | $4 | $0.40 | $5 | $20 | 1,050,000 | Yes |
| GPT-5.5 | $5 | $0.50 | — | $30 | 1,050,000 | Yes |
| GPT-6 Astra | $10 | $1 | $12.50 | $50 | 1,050,000 | Yes |
How OpenAI compares with other providers
| Provider | Models | Cheapest input | Cheapest output | Flagship output |
|---|---|---|---|---|
| OpenAI | 13 | $0.10 | $0.50 | $50 |
| Anthropic | 5 | $1 | $5 | $50 |
| Google Gemini | 6 | $0.30 | $2.50 | $12 |
| xAI Grok | 2 | $1.25 | $2.50 | $6 |
| DeepSeek | 2 | $0.30 | $1.20 | $3.96 |
Workload cost on OpenAI
| Model | Support chat 1K reqs · 4K/600 | RAG + cache 1K reqs · 50K/1K | Nightly batch 10K reqs · 10K/2K |
|---|---|---|---|
| GPT-6 Luna | $0.70 | $1.46 | $10 |
| GPT-5.6 Luna | $1.52 | $3.11 | $22 |
| GPT-5.4 nano | $1.55 | $3.16 | $22.50 |
| GPT-5.4 mini | $5.70 | $11.66 | $82.50 |
| GPT-4.1 | $12.80 | $40.57 | $180 |
| GPT-6.1 Sol | $14 | $24.61 | $200 |
| GPT-6 Sol | $14 | $29.10 | $200 |
| GPT-5.6 Terra | $15.20 | $31.10 | $220 |
| GPT-5.2 | $15.40 | $30.70 | $228 |
| GPT-5.4 | $19 | $38.85 | $275 |
| GPT-5.6 Sol | $28 | $58.21 | $400 |
| GPT-5.5 | $38 | $77.70 | $550 |
| GPT-6 Astra | $70 | $146 | $1000 |
FAQ
What is the cheapest OpenAI model?
GPT-6 Luna at $0.10 per 1M input and $0.50 per 1M output tokens.
What is the most expensive OpenAI model?
GPT-6 Astra at $10 per 1M input and $50 per 1M output tokens.
Does OpenAI charge for prompt caching?
Yes. Cached reads are published per model; on this provider they range from $0.01 to $1 per 1M tokens.