OpenAI API pricing
GPT-6 Astra, the OpenAI flagship, costs $10 per million input tokens and $50 per million output tokens. OpenAI’s other current models, per million input / output tokens: GPT-6.1 Sol $2 / $10, GPT-6.1 Terra $1 / $5 and GPT-6 Luna $0.10 / $0.50.
GPT-6 Astra, GPT-6.1 Sol and GPT-6.1 Terra also run on cheaper AI API credit, up to 75% below list. $25 a month brings $110 of API credit and cancels any time; $25 once buys $100. ChatGPT has a free plan, and its paid plans are Go ($8/mo), Plus ($20/mo), Pro (from $100/mo), Business ($25/mo) and Business Premium ($125/mo). ChatGPT monthly plans
| GPT-6 Astra | GPT-6.1 Sol | GPT-6.1 Terra | GPT-6 Luna | |
|---|---|---|---|---|
| Input | $10.00 | $2.00 | $1.00 | $0.10 |
| Output | $50.00 | $10.00 | $5.00 | $0.50 |
| Cache read | $1.00 | $0.10 | $0.05 | $0.01 |
| Cache write | $12.50 | $2.50 | $1.25 | $0.125 |
| Batch input | $5.00 | $1.00 | $0.50 | $0.05 |
| Batch output | $25.00 | $5.00 | $2.50 | $0.25 |
| Through AIGROW credit | ||||
| Input | $2.50 | $0.50 | $0.25 | Not sold through credit |
| Output | $12.50 | $2.50 | $1.25 | Not sold through credit |
US dollars per million tokens. List prices read 12 November 2026 from OpenAI. Batch is the Batch API rate, for requests that need no answer at once.
What the film says
- Paying list price for Claude?
- Claude Opus 5.5, Claude Fable 5.2, GPT-6 Astra, Gemini 4 Argon and Grok 4.7, +4 more models
- $1.60 instead of $4.00. Per million input tokens on Claude Opus 5.5.
- 9 of 9 models on sale pass the check against the same model at its maker. The results and the script are public: aigrow.gg/ai-api/genuine-models
- API credit$100 of API credit for $25. Start today.
Per token and per pass
The list price per million tokens, then how many of the benchmark’s 20 office tasks each model passed and what 1,000 passing answers cost, failed runs included.
| Model | Input | Output | Cached input | Context | Tasks passed | 1,000 passes |
|---|---|---|---|---|---|---|
| GPT-6 AstraFlagships | $10.00 | $50.00 | $1.00 | 1.05M | 17 of 20 | $27.91 |
| GPT-6.1 SolWorkhorses | $2.00 | $10.00 | $0.10 | 1.05M | · | · |
| GPT-6.1 TerraWorkhorses | $1.00 | $5.00 | $0.05 | 1.05M | · | · |
| GPT-6 LunaSmall and fast | $0.10 | $0.50 | $0.01 | 1.05M | · | · |
| Earlier generations | ||||||
| GPT-6 SolReplaced by GPT-6.1 Sol | $2.00 | $10.00 | $0.20 | 1.05M | · | · |
| GPT-5.6 SolReplaced by GPT-6.1 Sol | $4.00 | $20.00 | $0.40 | 1.05M | 17 of 20 | $11.33 |
| GPT-5.6 TerraReplaced by GPT-6.1 Terra | $2.00 | $12.00 | $0.20 | 1.05M | 16 of 20 | $6.68 |
| GPT-5.6 LunaReplaced by GPT-6 Luna | $0.20 | $1.20 | $0.02 | 1.05M | 16 of 20 | $0.677 |
| GPT-5.5Replaced by GPT-6 Astra | $5.00 | $30.00 | $0.50 | 1.05M | 17 of 20 | $17.02 |
| GPT-5.4 miniReplaced by GPT-6.1 Terra | $0.75 | $4.50 | $0.075 | 400K | 8 of 20 | $3.35 |
| GPT-5.4 nanoReplaced by GPT-6 Luna | $0.20 | $1.25 | $0.02 | 400K | 6 of 20 | $1.51 |
AIGROW API credit per million input / output tokens: GPT-6 Astra $2.50 / $12.50, GPT-6.1 Sol $0.50 / $2.50 and GPT-6.1 Terra $0.25 / $1.25. That is up to 75% below list price. See API credit
Where a model ran on a subscription, its cost per pass is worked from the list price above rather than billed usage. gpt-oss-120b has open weights and no list price: OpenAI sells no API for it.
To see what your own workload costs on every model, use the LLM API cost calculator.
ChatGPT monthly plans
Consumer and team subscription plans published by OpenAI for ChatGPT.
| Plan | Monthly price | Models included |
|---|---|---|
| Free | $0/mo | GPT-6 LunaEarlier generations: GPT-5.6 Terra |
| Go | $8/mo | GPT-6 LunaEarlier generations: GPT-5.6 Terra |
| Plus | $20/mo | GPT-6.1 Sol, GPT-6 Astra, GPT-6 LunaEarlier generations: GPT-6 Sol, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna |
| Pro | from $100/mo | GPT-6.1 Sol, GPT-6 Astra, GPT-6 LunaEarlier generations: GPT-6 Sol, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna |
| Business | $25/mo ($20/mo billed yearly) | GPT-6.1 Sol, GPT-6 Astra, GPT-6 LunaEarlier generations: GPT-6 Sol, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna |
| Business Premium | $125/mo ($100/mo billed yearly) | GPT-6.1 Sol, GPT-6 Astra, GPT-6 LunaEarlier generations: GPT-6 Sol, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna |
chatgpt.com/pricing/ · help.openai.com/en/articles/6950777-what-is-chatgpt-plus · help.openai.com/en/articles/9793128-about-chatgpt-pro-tiers · help.openai.com/en/articles/8792828-chatgpt-business-overview · Plus, Pro, Business and Business Premium read 22 October 2026. Free and Go read 14 October 2026. Prices can differ by country and include or exclude tax depending on the country.
What a token is and what one message costs
A token is a piece of a word. The API counts every token it reads as input and every token it writes as output, and bills each kind per million. Here is one ordinary message at OpenAI’s list price.
A month of OpenAI tokens through AIGROW credit
Pick how you use it to see a month at OpenAI’s list price and through credit, from the same rates the meter bills with.
GPT-6 Astra, Coding agent: $693.00 a month at the list price, $173.25 through AIGROW credit, $519.75 less (75%).
Covered by the $250 monthly planThis use takes 55% of its credit each month.
How we count
A developer in Claude Code, Cline or OpenCode, 250 requests on each of 21 working days. Each request reads 60,000 tokens of conversation and files from the prompt cache, writes 2,400 new ones to it, sends 1,200 uncached and gets 600 back.
GPT-6 Astra is 75% below list on every kind of token.
OpenAI prices the 4 current models on our list from GPT-6 Luna at $0.10 in and $0.50 out per million tokens to GPT-6 Astra at $10 in and $50 out. On the AIGROW small-business benchmark GPT-6 Astra had the best record, 17 of 20 tasks passed, at $27.91 per thousand passes.
What three everyday jobs cost
1,000 runs of each job at list price. The token counts are ours; the prices are OpenAI’s.
| Model | 1,000 × support reply | 1,000 × document summary | 1,000 × agent task |
|---|---|---|---|
| GPT-6 Astra | $50.00 | $300 | $320 |
| GPT-6.1 Sol | $10.00 | $60.00 | $57.00 |
| GPT-6.1 Terra | $5.00 | $30.00 | $28.50 |
| GPT-6 Luna | $0.50 | $3.00 | $3.20 |
- Support reply
- A 3,000-token prompt (the ticket, the thread so far and a policy excerpt) and a 400-token answer.
- Document summary
- A 40-page document of about 25,000 tokens in, a 1,000-token summary out.
- Agent task
- Ten steps that read 80,000 tokens between them, 70,000 of them context repeated from step to step and served from cache, and write 3,000.
Questions about OpenAI API pricing
- How much does one OpenAI token cost?
- On GPT-6 Astra, 1,000 input tokens cost $0.01 and 1,000 output tokens cost $0.05. On GPT-6 Luna, the lowest-priced, they cost $0.0001 and $0.0005.
- How many tokens is a word?
- OpenAI’s rule of thumb for English is 1 token to about 4 characters or 0.75 words, so 100 words come to about 133 tokens.
- Is there a free tier on the OpenAI API?
- OpenAI’s pricing page lists no free allowance. Its rate limit guide has a Free usage tier for users in an allowed geography, and the paid tiers begin once you have bought $5 of credit.
- How are cached prompts and batch requests charged?
- Prompt caching is on by default, and repeated input bills at the cached rate in the table. On GPT-5.6 and later a cache write costs 1.25 times the uncached input price. The Batch API costs 50% less and returns results within 24 hours.
- How can I pay less for the OpenAI API?
- Use a lower-priced model where it does the job, let prompt caching bill repeated input at the cached rate, and send work that can wait through Batch or Flex, both 50% off. AIGROW API credit per million input / output tokens: GPT-6 Astra $2.50 / $12.50, GPT-6.1 Sol $0.50 / $2.50 and GPT-6.1 Terra $0.25 / $1.25. That is up to 75% below list price.
Sources: developers.openai.com/api/docs/pricing · developers.openai.com/api/docs/concepts · developers.openai.com/api/docs/guides/rate-limits · developers.openai.com/api/docs/guides/batch · developers.openai.com/api/docs/guides/prompt-caching. Read 20 October 2026.
The small print
What OpenAI’s pricing pages add to the headline rates.
- GPT-6 Astra
- Requests above 272K input tokens bill 2x input and 1.5x output ($20 / $75, cached $2). Cache write $12.50. Batch and Flex 50% off, Fast mode 2x, Ultrafast mode $60 / $300 since 29 September 2026. Data residency adds 10%. Context 1,050,000 with max input 922K.
- GPT-6.1 Sol
- OpenAI recommends it to balance intelligence and cost. Requests above 272K input tokens bill 2x input and 1.5x output ($4 / $15, cached $0.20). Cache write $2.50. Batch and Flex 50% off, Fast mode 2x, Ultrafast mode $12 / $60. Data residency adds 10%. Context 1,050,000 with max input 922K.
- GPT-6.1 Terra
- OpenAI pitches it as a fast, efficient model for visual reasoning, computer use and writing. Requests above 272K input tokens bill 2x input and 1.5x output ($2 / $7.50, cached $0.10). Cache write $1.25 (30 min) or $2.50 (12 h). Batch and Flex 50% off, Fast mode 2x. Data residency adds 10%. Context 1,050,000 with max input 922K.
- GPT-6 Sol
- OpenAI points to GPT-6.1 Sol as the newer Sol model. Requests above 272K input tokens bill 2x input and 1.5x output ($4 / $15, cached $0.40). Cache write $2.50. Batch and Flex 50% off, Fast mode 2x. Data residency adds 10%.
- GPT-6 Luna
- Requests above 272K input tokens bill 2x input and 1.5x output ($0.20 / $0.75, cached $0.02). Cache write $0.125. Batch and Flex 50% off, Fast mode 2x. Data residency adds 10%.
- GPT-5.6 Sol
- Promotional price since 2026-08-21, 'available until November 30, 2026'; the previous price was $5 / $30. Requests above 272K input tokens bill 2x input and 1.5x output ($8 / $30). Cache write $5. Batch and Flex 50% off. Data residency adds 10%.
- GPT-5.6 Terra
- OpenAI calls it the mini tier of the 5.6 family; tiered mid here on price. Price cut 20% on 2026-07-30. Requests above 272K input tokens bill 2x input and 1.5x output ($4 / $18). Cache write $2.50. Batch and Flex 50% off. Data residency adds 10%.
- GPT-5.6 Luna
- Nano tier of the 5.6 family. Price cut 80% on 2026-07-30. Requests above 272K input tokens bill 2x input and 1.5x output ($0.40 / $1.80). Cache write $0.25. Batch and Flex 50% off. Data residency adds 10%.
- GPT-5.5
- Previous flagship. Requests above 272K input tokens bill 2x input and 1.5x output ($10 / $45). Cached price applies only with extended prompt caching. Batch and Flex 50% off. Data residency adds 10%.
- GPT-5.4 mini
- Batch 50% off. Context 400,000 with max input 272K.
- GPT-5.4 nano
- Deprecated on 1 October 2026: OpenAI shuts it down on 1 April 2027 and recommends GPT-6 Luna instead. Batch 50% off.
A price page for each OpenAI model
Earlier generations
- GPT-6 Sol pricingReplaced by GPT-6.1 Sol
- GPT-5.6 Sol pricingReplaced by GPT-6.1 Sol
- GPT-5.6 Terra pricingReplaced by GPT-6.1 Terra
- GPT-5.6 Luna pricingReplaced by GPT-6 Luna
- GPT-5.5 pricingReplaced by GPT-6 Astra
- GPT-5.4 mini pricingReplaced by GPT-6.1 Terra
- GPT-5.4 nano pricingReplaced by GPT-6 Luna
Head to head
The comparisons with a OpenAI model on one side, each with both prices and the three jobs costed on each.
- Gemini 4 Argon vs GPT-6 Astra
- Gemini 4 Argon vs GPT-6.1 Sol
- Claude Opus 5.5 vs GPT-6 Astra
- Claude Sonnet 5.5 vs GPT-6.1 Sol
- Claude Haiku 5.5 vs GPT-6 Luna
- Claude Opus 5.5 vs GPT-6.1 Sol
- GPT-6 Astra vs GPT-6.1 Sol
- GPT-6.1 Sol vs Gemini 3.8 Flash
- GPT-6 Luna vs Gemini 3.5 Flash-Lite
- Grok 4.7 vs GPT-6.1 Sol
- GPT-6.1 Sol vs GPT-6.1 Terra
- GPT-6.1 Terra vs GPT-6 Luna
- Claude Sonnet 5.5 vs GPT-6.1 Terra
- GPT-6.1 Terra vs Gemini 3.8 Flash
- Kimi K3.1 Pro vs GPT-6.1 Sol
- Claude Fable 5.2 vs GPT-6 Astra
Comparisons with an earlier generation
- GPT-6.1 Sol vs GPT-6 Sol
- GPT-6.1 Sol vs GPT-5.6 Sol
- GPT-6.1 Sol vs Gemini 3.1 Pro (preview)
- GPT-6 Luna vs GPT-5.6 Luna
- GPT-6 Astra vs Claude Fable 5.1
- GPT-6 Astra vs Gemini 3.1 Pro (preview)
- GPT-6 Astra vs GPT-5.6 Sol
- GPT-5.5 vs GPT-5.6 Sol
- Claude Opus 5 vs GPT-5.6 Sol
- GPT-5.6 Sol vs Gemini 3.1 Pro (preview)
- Grok 4.7 vs GPT-5.6 Sol
- DeepSeek V4 Pro vs GPT-5.6 Sol
- Muse Spark 1.3 vs GPT-5.6 Sol
- Claude Sonnet 5 vs GPT-5.6 Terra
- GPT-5.6 Terra vs Gemini 3.8 Flash
- GPT-5.6 Sol vs GPT-5.6 Terra
Where the prices come from
Read on 12 November 2026. Each price is the standard rate for the shortest context band, with no batch or priority discount; long-context surcharges, batch rates and promotions are in each model’s small print. No price was taken from a reseller.
Pay up to 75% below list price
AIGROW API credit covers GPT-6 Astra, GPT-6.1 Sol and GPT-6.1 Terra at published rates below the list prices above. The credit page lists each rate.
Prices checked 12 November 2026 · See them by release date · See the LLM leaderboard