OpenAI API pricing
OpenAI charges per million tokens, with a lower rate for the tokens you send than for the tokens the model writes. The 7 OpenAI models we track run from $0.10 / $0.50 (GPT-6 Luna) to $10.00 / $50.00 (GPT-6 Astra).
Prices from OpenAI’s official pricing page, verified October 3, 2026.
Every OpenAI model, cheapest first
USD per 1M tokens, standard tier.
| Model | Input | Cached input | Output | Long context | Batch | Context |
|---|---|---|---|---|---|---|
| GPT-6 Luna gpt-6-luna | $0.10 | $0.01 | $0.50 | $0.20 in / $0.75 out on long-context requests | 50% off | 1.05M tokens |
| GPT-5.6 Luna gpt-5.6-luna | $0.20 | $0.02 | $1.20 | $0.40 in / $1.80 out on long-context requests | 50% off | 1.05M tokens |
| GPT-6 Sol gpt-6-sol | $2.00 | $0.20 | $10.00 | $4.00 in / $15.00 out on long-context requests | 50% off | 1.05M tokens |
| GPT-6.1 Sol gpt-6.1-sol | $2.00 | $0.10 | $10.00 | $4.00 in / $15.00 out above 272K prompt tokens | 50% off | 1.05M tokens |
| GPT-5.6 Terra gpt-5.6-terra | $2.00 | $0.20 | $12.00 | $4.00 in / $18.00 out on long-context requests | 50% off | 1.05M tokens |
| GPT-5.6 Sol gpt-5.6-sol | $4.00 | $0.40 | $20.00 | $8.00 in / $30.00 out on long-context requests | 50% off | 1.05M tokens |
| GPT-6 Astra gpt-6-astra | $10.00 | $1.00 | $50.00 | $20.00 in / $75.00 out on long-context requests | 50% off | 1.05M tokens |
OpenAI API cost calculator
- $55.00/mo$0.0011 / request
- GPT-5.6 LunaOpenAI$116.00/mo$0.0023 / request
- GPT-6 SolOpenAI$1,100/mo$0.02 / request
- GPT-6.1 SolOpenAI$1,100/mo$0.02 / request
- GPT-5.6 TerraOpenAI$1,160/mo$0.02 / request
- GPT-5.6 SolOpenAI$2,200/mo$0.04 / request
- GPT-6 AstraOpenAI$5,500/mo$0.11 / request
Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.
Pricing details by model
- GPT-6 Luna
- Cache writes are billed at $0.125 per 1M tokens.
- Fast mode costs 2x the standard rate; Flex costs half.
- Regional (data residency) endpoints add a 10% uplift, and EU data residency is available only with standard processing.
- GPT-5.6 Luna
- Cache writes are billed at $0.25 per 1M tokens.
- Fast mode costs 2x the standard rate; Flex costs half.
- GPT-6 Sol
- Cache writes are billed at $2.50 per 1M tokens.
- Fast mode costs 2x the standard rate; Flex costs half.
- Regional (data residency) endpoints add a 10% uplift, and EU data residency is available only with standard processing.
- GPT-6.1 Sol
- Cached input costs $0.10 per 1M tokens, half of GPT-6 Sol’s $0.20.
- Cache writes are billed at $2.50 per 1M tokens.
- Prompts over 272K input tokens use the long-context rates.
- Fast mode costs 2x the standard rate; Flex costs half.
- GPT-5.6 Terra
- Cache writes are billed at $2.50 per 1M tokens.
- Fast mode costs 2x the standard rate; Flex costs half.
- GPT-5.6 Sol
- Promotional pricing, available at least through November 21, 2026.
- Cache writes are billed at $5 per 1M tokens.
- Regional (data residency) endpoints add a 10% uplift.
- GPT-6 Astra
- Cache writes are billed at $12.50 per 1M tokens.
- Fast mode costs 2x the standard rate; Flex costs half.
- Regional (data residency) endpoints add a 10% uplift.
Recent OpenAI pricing changes
GPT-5.6 Sol promotional pricing guaranteed through this date
OpenAI says GPT-5.6 Sol’s promotional pricing ($4 input / $20 output per 1M tokens) is available at least through November 21, 2026.
GPT-6.1 Sol added
OpenAI’s GPT-6.1 Sol keeps GPT-6 Sol’s $2 input / $10 output per 1M tokens but halves cached input to $0.10. OpenAI describes it as near-Astra performance at a lower cost.
ChatGPT Pro adds a $500 plan
Pro is now offered at $100, $200 or $500 a month. The $500 plan includes access to GPT-6 Astra Ultrafast mode.
OpenAI removes Sora 2 and Sora 2 Pro from the API
The sora-2 and sora-2-pro video models and the Videos API were shut down on September 24, 2026, as announced in March. They had cost $0.10 and $0.30 per second of 720p video.
OpenAI renames Priority processing to Fast mode
Priority processing is now called Fast mode, selectable with service_tier “priority” or “fast”. Fast mode costs 2x the standard rate.
OpenAI against other providers
Subscription instead of the API?
These plans run OpenAI models for a flat monthly price. See whether one costs less than paying per token with the subscription vs API calculator.
Frequently asked questions
- How much does the OpenAI API cost?
- OpenAI API prices range from $0.10 input / $0.50 output per 1M tokens for GPT-6 Luna to $10.00 / $50.00 for GPT-6 Astra. A support chatbot handling 100,000 replies a month costs about $35.00 on GPT-6 Luna.
- What is the cheapest OpenAI model?
- GPT-6 Luna, at a blended $0.20 per 1M tokens (3 input : 1 output) — 99% less per token than GPT-6 Astra.
- Does the OpenAI API have a batch discount?
- Yes. Batch requests, which return results within a window of up to 24 hours instead of immediately, cost 50% less on the OpenAI models that support it.
- Which OpenAI model is the most capable?
- GPT-6 Astra has the highest Epoch Capabilities Index of the OpenAI models we track (166.3), at $10.00 input / $50.00 output per 1M tokens.