GPT-6 API pricing · Updated
GPT-6.1 Sol costs $2.00 per million input tokens and $10.00 per million output tokens on the OpenAI API. GPT-6 Astra costs $10.00 and $50.00, GPT-6.1 Terra $1.00 and $5.00, and GPT-6 Luna $0.10 and $0.50. Batch and Flex halve every price, Fast mode doubles it, and prompts over 272,000 tokens cost more.
| Model | Input | Cache read | 30-min cache write | Output | Batch in / out | Status |
|---|---|---|---|---|---|---|
GPT-6 Astragpt-6-astraPrompts over 272,000 tokens: $20.00 in / $75.00 out | $10.00 | $1.00 | $12.50 | $50.00 | $5.00 / $25.00 | Available |
GPT-6.1 Solgpt-6.1-solPrompts over 272,000 tokens: $4.00 in / $15.00 out | $2.00 | $0.10 | $2.50 | $10.00 | $1.00 / $5.00 | Current |
GPT-6.1 Terragpt-6.1-terraPrompts over 272,000 tokens: $2.00 in / $7.50 out | $1.00 | $0.05 | $1.25 | $5.00 | $0.50 / $2.50 | Available |
GPT-6 Solgpt-6-solPrompts over 272,000 tokens: $4.00 in / $15.00 out | $2.00 | $0.20 | $2.50 | $10.00 | $1.00 / $5.00 | Available |
GPT-6 Lunagpt-6-lunaPrompts over 272,000 tokens: $0.20 in / $0.75 out | $0.10 | $0.01 | $0.125 | $0.50 | $0.05 / $0.25 | Available |
Prices from OpenAI’s pricing page and deprecation schedule, for OpenAI’s own API. Ganivra uses these same rates to price GPT-6 calls. Upcoming changes across providers are on the price change and shutdown tracker.
Worked out from the prices above, at standard rates with no Batch discount.
| Request | GPT-6.1 Sol | GPT-6 Astra | Per 1,000 on GPT-6.1 Sol |
|---|---|---|---|
| Chat reply3,000 input tokens, 500 output | $0.011 | $0.055 | $11.00 |
| Document summary30,000 input tokens, 1,500 output | $0.075 | $0.375 | $75.00 |
| Agent task80,000 input tokens (60,000 cached), 6,000 output | $0.106 | $0.560 | $106 |
The same agent task (80,000 input tokens (60,000 cached), 6,000 output) on other models, per 1,000 requests. Quality differs between models, so test on your own prompts before switching.
| Model | Input / output per 1M | Agent task per 1,000 | vs GPT-6.1 Sol |
|---|---|---|---|
| DeepSeek V4.1 Flash on Together AI | $0.30 / $1.20 | $13.56 | −87% |
| GPT-6.1 Sol | $2.00 / $10.00 | $106 | — |
| Claude Sonnet 5.5 | $2.00 / $10.00 | $106 | Same price |
| Gemini 4 Argon | $2.00 / $10.00 | $106 | Same price |
| Claude Opus 5.5 | $4.00 / $20.00 | $212 | +100% |
| GPT-5.6 Sol | $4.00 / $20.00 | $224 | +111% |
To see what your own calls would cost on each of these, Ganivra reprices your recorded usage in model comparison.
Head-to-head price comparisons: Claude Sonnet 5.5 vs GPT-6.1 Sol · Claude Opus 5.5 vs GPT-6 Astra · Claude Opus 5.5 vs GPT-6.1 Sol · Claude Fable 5.1 vs GPT-6 Astra · Claude Haiku 5.5 vs GPT-6 Luna · GPT-6.1 Sol vs Gemini 4 Argon · GPT-6 Astra vs Gemini 4 Argon · Claude Sonnet 5.5 vs GPT-6.1 Terra · Gemini 3.8 Flash vs GPT-6.1 Terra · Gemini 3.8 Flash vs GPT-6 Luna · Gemini 3.5 Flash-Lite vs GPT-6 Luna · GPT-6.1 Sol vs DeepSeek V4.1 Flash · GPT-6.1 Sol vs GPT-6 Astra · GPT-6.1 Sol vs GPT-6.1 Terra · GPT-6.1 Terra vs GPT-6 Luna · GPT-6.1 Sol vs GPT-5.6 Sol · all comparisons.
Ganivra prices every GPT-6 call at these rates and adds it up by customer, feature and workflow, next to what each customer pays. You see who is profitable on GPT-6 and who isn’t.
Per million tokens, GPT-6.1 Sol costs $2.00 input and $10.00 output, GPT-6 Astra $10.00 input and $50.00 output, GPT-6.1 Terra $1.00 input and $5.00 output and GPT-6 Luna $0.10 input and $0.50 output. A chat reply of 3,000 input and 500 output tokens costs $0.011 on GPT-6.1 Sol and $0.0006 on GPT-6 Luna.
They are price tiers of the same generation. Astra is the most expensive at $10.00 input and $50.00 output per million tokens. Sol costs 5 times less, Terra half of Sol, and Luna 20 times less than Sol.
Input and output cost the same: $2.00 input and $10.00 output per million tokens on both. Cache reads are half the price on GPT-6.1 Sol, $0.10 per million instead of $0.20, so cache-heavy workloads such as agents are cheaper on 6.1.
Once a prompt passes 272,000 input tokens, the whole request is billed at long-context rates: $4.00 input and $15.00 output per million on GPT-6.1 Sol and $20.00 input and $75.00 output on GPT-6 Astra.
On GPT-6.1 Sol, Batch and Flex cost $1.00 input and $5.00 output per million tokens, Fast mode $4.00 input and $20.00 output and Ultrafast $12.00 input and $60.00 output. Ultrafast is offered only on GPT-6.1 Sol and GPT-6 Astra.
Yes. GPT-5.6 Sol costs $4.00 input and $20.00 output per million tokens, 2 times the price of GPT-6.1 Sol. OpenAI lists the GPT-5.6 Sol price as promotional through at least November 21, 2026.
They cost the same per token: $2.00 input and $10.00 output per million on GPT-6.1 Sol and $2.00 input and $10.00 output on Claude Sonnet 5.5, with cache reads at $0.10 and $0.10. What you pay differs with how many tokens each model uses for your prompts, so compare real requests.
Tag each GPT-6 call with the customer it served, then price it at these rates and add it up by customer. Ganivra does this automatically with two lines of the Python SDK, including Batch, Flex and Fast mode calls, and shows each customer's OpenAI cost next to what they pay you.
Looking for another model? See all 165 supported models and prices.