--- title: "OpenAI o series family — distinct SKUs · Undominated.ai" canonical: https://undominated.ai/families/openai-o/ description: "The o-series contains separate reasoning models and dated revisions. Visible output, billed reasoning and the available endpoint controls must remain distinct." --- # OpenAI o series family — distinct SKUs · Undominated.ai > The o-series contains separate reasoning models and dated revisions. Visible output, billed reasoning and the available endpoint controls must remain distinct. OpenAI / lineage # OpenAI o series family The o-series contains separate reasoning models and dated revisions. Visible output, billed reasoning and the available endpoint controls must remain distinct. Family research reviewed 2026-09-22 · Official source notes below Standard models 8 Independently rated 5 / 8 Known token rates 8 / 8 Global balanced frontier 0 [Compare the members ↓](#members)[Read source notes](#source-notes)[All families](https://undominated.ai/families/) [Compare models](https://undominated.ai/compare/) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. This collection organises accepted catalogue identities. It does not certify equal weights, a shared licence, benchmark equivalence or current availability on every serving platform. ## Compare exact catalogue rows USD per 1M tokens. In / out are listed base rates; expand billing conditions before planning a request. LMArena scores measure the general preference board, not success on your engineering task. Unknown stays unknown. ### Catalogue members | Model | LMArena | Input / output $/M | Context / max output | Capabilities & conditions | | --- | --- | --- | --- | --- | | [o3 Pro](https://undominated.ai/models/openai__o3-pro/) [Check](https://undominated.ai/check/openai__o3-pro/) [Compare](https://undominated.ai/compare/?models=openai%2Fo3-pro) [Full evidence ↗](https://undominated.ai/models/openai__o3-pro/) openai/o3-pro | Unrated | $20.00 / $80.00 Listed base rates Billing details Cached input Unknown Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | text · file · image Tools yes · reasoning yes Weights unknown Released 2025-06-10 | | [o4 Mini High](https://undominated.ai/models/openai__o4-mini-high/) [Check](https://undominated.ai/check/openai__o4-mini-high/) [Compare](https://undominated.ai/compare/?models=openai%2Fo4-mini-high) [Full evidence ↗](https://undominated.ai/models/openai__o4-mini-high/) openai/o4-mini-high | Unrated | $1.10 / $4.40 Listed base rates Billing details Cached input $0.275 Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | image · text · file Tools yes · reasoning yes Weights unknown Released 2025-04-16 | | [o3](https://undominated.ai/models/openai__o3/) [Check](https://undominated.ai/check/openai__o3/) [Compare](https://undominated.ai/compare/?models=openai%2Fo3) [Full evidence ↗](https://undominated.ai/models/openai__o3/) openai/o3 | 1409.9 ±3.6 interval half-width Effort: default | $2.00 / $8.00 Listed base rates Billing details Cached input $0.500 Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | image · text · file Tools yes · reasoning yes Weights unknown Released 2025-04-16 | | [o4 Mini](https://undominated.ai/models/openai__o4-mini/) [Check](https://undominated.ai/check/openai__o4-mini/) [Compare](https://undominated.ai/compare/?models=openai%2Fo4-mini) [Full evidence ↗](https://undominated.ai/models/openai__o4-mini/) openai/o4-mini | 1353.2 ±4.0 interval half-width Effort: default | $1.10 / $4.40 Listed base rates Billing details Cached input $0.275 Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | image · text · file Tools yes · reasoning yes Weights unknown Released 2025-04-16 | | [o1-pro](https://undominated.ai/models/openai__o1-pro/) [Check](https://undominated.ai/check/openai__o1-pro/) [Compare](https://undominated.ai/compare/?models=openai%2Fo1-pro) [Full evidence ↗](https://undominated.ai/models/openai__o1-pro/) openai/o1-pro | Unrated | $150 / $600 Listed base rates Billing details Cached input Unknown Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | text · image · file Tools no · reasoning yes Weights unknown Released 2025-03-19 | | [o3 Mini High](https://undominated.ai/models/openai__o3-mini-high/) [Check](https://undominated.ai/check/openai__o3-mini-high/) [Compare](https://undominated.ai/compare/?models=openai%2Fo3-mini-high) [Full evidence ↗](https://undominated.ai/models/openai__o3-mini-high/) openai/o3-mini-high | 1336.5 ±5.3 interval half-width Effort: default | $1.10 / $4.40 Listed base rates Billing details Cached input $0.550 Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | text · file Tools yes · reasoning yes Weights unknown Released 2025-02-12 | | [o3 Mini](https://undominated.ai/models/openai__o3-mini/) [Check](https://undominated.ai/check/openai__o3-mini/) [Compare](https://undominated.ai/compare/?models=openai%2Fo3-mini) [Full evidence ↗](https://undominated.ai/models/openai__o3-mini/) openai/o3-mini | 1319.1 ±3.5 interval half-width Effort: default | $1.10 / $4.40 Listed base rates Billing details Cached input $0.550 Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | text · file Tools yes · reasoning yes Weights unknown Released 2025-01-31 | | [o1](https://undominated.ai/models/openai__o1/) [Check](https://undominated.ai/check/openai__o1/) [Compare](https://undominated.ai/compare/?models=openai%2Fo1) [Full evidence ↗](https://undominated.ai/models/openai__o1/) openai/o1 | 1365.7 ±4.5 interval half-width Effort: default | $15.00 / $60.00 Listed base rates Billing details Cached input $7.50 Separate reasoning Not separately listed Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 200,000 Output 100,000 | text · image · file Tools yes · reasoning yes Weights unknown Released 2024-12-17 | ## Free and batch variants These rows have different access or processing conditions. They are excluded from the standard-row counts above. A variant without a standard base remains a separately named variant. - [o3 (batch)](https://undominated.ai/models/openai__o3__batch/) batch · $1.00 in / $4.00 out per 1M - [o4 Mini (batch)](https://undominated.ai/models/openai__o4-mini__batch/) batch · $0.550 in / $2.20 out per 1M - [o3 Mini (batch)](https://undominated.ai/models/openai__o3-mini__batch/) batch · $0.550 in / $2.20 out per 1M ## Sources and scope - [OpenAI model catalogue ↗](https://developers.openai.com/api/docs/models/all) Exact named models on the vendor platform; not a promise about every reseller Checked 2026-09-22 · official document opened and inspected Source review does not refresh a price or transplant a benchmark score. [Read the method](https://undominated.ai/methodology/) and [correction policy](https://undominated.ai/corrections/). ## Questions this page answers Are the OpenAI o series family models interchangeable? No. These are exact catalogue rows with separate capability, pricing and rating evidence. Compare the checkpoint, serving endpoint, reasoning settings and required input types. A family name does not establish equivalent behaviour. How many OpenAI rows are compared here? 8 standard rows, of which 5 have an accepted LMArena general score and 8 have known input and output token rates. 3 related free or batch variants are listed separately. What do the prices and frontier counts mean? Prices below are listed US dollars per million input or output tokens, before request-specific context tiers and other billing dimensions. The frontier count comes from the global balanced view. Neither a family price range nor a benchmark difference proves your task will be cheaper or more successful. How current are the official notes? The linked family research was reviewed 2026-09-22. That date is separate from each accepted catalogue observation and each vendor’s effective date. An official note applies to its named platform, not automatically to every reseller. ## Continue your investigation - [Compare exact models](/compare/) - [Inspect model evidence](/models/) - [Check lifecycle notices](/deprecations/) - [Estimate local capacity](/self-host/)