--- title: "GPT-6 family — distinct SKUs · Undominated.ai" canonical: https://undominated.ai/families/gpt-6/ description: "Astra, Sol and Luna retain separate catalogue identities, as do their Pro-labelled rows. OpenAI’s direct API reasoning mode and marketplace model slugs are different integration surfaces." --- # GPT-6 family — distinct SKUs · Undominated.ai > Astra, Sol and Luna retain separate catalogue identities, as do their Pro-labelled rows. OpenAI’s direct API reasoning mode and marketplace model slugs are different integration surfaces. OpenAI / generation # GPT-6 family Astra, Sol and Luna retain separate catalogue identities, as do their Pro-labelled rows. OpenAI’s direct API reasoning mode and marketplace model slugs are different integration surfaces. Family research reviewed 2026-09-22 · Official source notes below Standard models 6 Independently rated 1 / 6 Known token rates 6 / 6 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. ## Before you choose ### Direct API identity OpenAI distinguishes the named model, reasoning mode and effort. A Pro-labelled marketplace row is retained separately and is not asserted to be a direct API model ID. [OpenAI reasoning guide ↗](https://developers.openai.com/api/docs/guides/reasoning) ## 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. ### Pro-labelled catalogue rows | Model | LMArena | Input / output $/M | Context / max output | Capabilities & conditions | | --- | --- | --- | --- | --- | | [GPT-6 Luna Pro](https://undominated.ai/models/openai__gpt-6-luna-pro/) [Check](https://undominated.ai/check/openai__gpt-6-luna-pro/) [Compare](https://undominated.ai/compare/?models=openai%2Fgpt-6-luna-pro) [Full evidence ↗](https://undominated.ai/models/openai__gpt-6-luna-pro/) openai/gpt-6-luna-pro | Unrated | $0.100 / $0.500 Context tiers apply Billing details Cached input $0.010 Separate reasoning Not separately listed Above 272,000 input tokens: $0.200 in / $0.750 out; cached $0.020. Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 1,050,000 Output 128,000 | file · image · text Tools yes · reasoning yes Weights unknown Released 2026-09-22 | | [GPT-6 Sol Pro](https://undominated.ai/models/openai__gpt-6-sol-pro/) [Check](https://undominated.ai/check/openai__gpt-6-sol-pro/) [Compare](https://undominated.ai/compare/?models=openai%2Fgpt-6-sol-pro) [Full evidence ↗](https://undominated.ai/models/openai__gpt-6-sol-pro/) openai/gpt-6-sol-pro | Unrated | $2.00 / $10.00 Context tiers apply Billing details Cached input $0.200 Separate reasoning Not separately listed Above 272,000 input tokens: $4.00 in / $15.00 out; cached $0.400. Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 1,050,000 Output 128,000 | file · image · text Tools yes · reasoning yes Weights unknown Released 2026-09-22 | | [GPT-6 Astra Pro](https://undominated.ai/models/openai__gpt-6-astra-pro/) [Check](https://undominated.ai/check/openai__gpt-6-astra-pro/) [Compare](https://undominated.ai/compare/?models=openai%2Fgpt-6-astra-pro) [Full evidence ↗](https://undominated.ai/models/openai__gpt-6-astra-pro/) openai/gpt-6-astra-pro | Unrated | $10.00 / $50.00 Context tiers apply Billing details Cached input $1.00 Separate reasoning Not separately listed Above 272,000 input tokens: $20.00 in / $75.00 out; cached $2.00. Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 1,050,000 Output 128,000 | file · image · text Tools yes · reasoning yes Weights unknown Released 2026-09-04 | ### Other generation members | Model | LMArena | Input / output $/M | Context / max output | Capabilities & conditions | | --- | --- | --- | --- | --- | | [GPT-6 Luna](https://undominated.ai/models/openai__gpt-6-luna/) [Check](https://undominated.ai/check/openai__gpt-6-luna/) [Compare](https://undominated.ai/compare/?models=openai%2Fgpt-6-luna) [Full evidence ↗](https://undominated.ai/models/openai__gpt-6-luna/) openai/gpt-6-luna | Unrated | $0.100 / $0.500 Context tiers apply Billing details Cached input $0.010 Separate reasoning Not separately listed Above 272,000 input tokens: $0.200 in / $0.750 out; cached $0.020. Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 1,050,000 Output 128,000 | file · image · text Tools yes · reasoning yes Weights unknown Released 2026-09-22 | | [GPT-6 Sol](https://undominated.ai/models/openai__gpt-6-sol/) [Check](https://undominated.ai/check/openai__gpt-6-sol/) [Compare](https://undominated.ai/compare/?models=openai%2Fgpt-6-sol) [Full evidence ↗](https://undominated.ai/models/openai__gpt-6-sol/) openai/gpt-6-sol | Unrated | $2.00 / $10.00 Context tiers apply Billing details Cached input $0.200 Separate reasoning Not separately listed Above 272,000 input tokens: $4.00 in / $15.00 out; cached $0.400. Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 1,050,000 Output 128,000 | file · image · text Tools yes · reasoning yes Weights unknown Released 2026-09-22 | | [GPT-6 Astra](https://undominated.ai/models/openai__gpt-6-astra/) [Check](https://undominated.ai/check/openai__gpt-6-astra/) [Compare](https://undominated.ai/compare/?models=openai%2Fgpt-6-astra) [Full evidence ↗](https://undominated.ai/models/openai__gpt-6-astra/) openai/gpt-6-astra | 1443.7 ±11.6 interval half-width Effort: max | $10.00 / $50.00 Context tiers apply Billing details Cached input $1.00 Separate reasoning Not separately listed Above 272,000 input tokens: $20.00 in / $75.00 out; cached $2.00. Tool, media, cache-write and service-tier charges may add dimensions. Read the full model evidence. | 1,050,000 Output 128,000 | file · image · text Tools yes · reasoning yes Weights unknown Released 2026-09-04 | ## 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. - [GPT-6 Luna Pro (batch)](https://undominated.ai/models/openai__gpt-6-luna-pro__batch/) batch · $0.050 in / $0.250 out per 1M - [GPT-6 Luna (batch)](https://undominated.ai/models/openai__gpt-6-luna__batch/) batch · $0.050 in / $0.250 out per 1M - [GPT-6 Sol Pro (batch)](https://undominated.ai/models/openai__gpt-6-sol-pro__batch/) batch · $1.00 in / $5.00 out per 1M - [GPT-6 Sol (batch)](https://undominated.ai/models/openai__gpt-6-sol__batch/) batch · $1.00 in / $5.00 out per 1M - [GPT-6 Astra (batch)](https://undominated.ai/models/openai__gpt-6-astra__batch/) batch · $5.00 in / $25.00 out per 1M - [GPT-6 Astra Pro (batch)](https://undominated.ai/models/openai__gpt-6-astra-pro__batch/) batch · $5.00 in / $25.00 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 - [OpenAI reasoning guide ↗](https://developers.openai.com/api/docs/guides/reasoning) Exact named models on the vendor platform; not a promise about every reseller Checked 2026-09-22 · web opened; full official Markdown fetched with HTTP 200 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 GPT-6 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? 6 standard rows, of which 1 have an accepted LMArena general score and 6 have known input and output token rates. 6 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/)