GPT-6 Luna

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openai/gpt-6-luna · by OpenAI · decoder-only-transformer

Pricing — 1 offering(s)

Input tokens

$0.10 / 1M tokens (input) Current 2026-09-22 → present

SCO-639: Standard processing, short-context rate. Also on OpenAI's pricing page but NOT tracked as tiers…

SCO-639: Standard processing, short-context rate. Also on OpenAI's pricing page but NOT tracked as tiers here: cached input $0.01/1M and cache writes $0.125/1M (the schema has no cached-input unit, and a separate per_1m_tokens_input tier would be read as the headline input price by routing and the site; see the cached-input support card), long- context (>272K input tokens) $0.20/1M input and $0.75/1M output, and Batch/Flex at 50% of Standard. No promotional-pricing caveat shown.

Output tokens

$0.50 / 1M tokens (output) Current 2026-09-22 → present

SCO-639: Standard processing, short-context rate. See the input tier's note for the cached-input…

SCO-639: Standard processing, short-context rate. See the input tier's note for the cached-input, long-context and Batch/Flex rates that aren't tracked here.

Showing the active price and any recorded history. Full pricing history is available via the paid API — see API docs.

See how GPT-6 Luna fits into a cost-aware routing setup

How GPT-6 Luna rates across core capability dimensions, with the task-level evidence behind each rating.

context window Strong

1,050,000-token context window, 128,000 max output tokens (developers.openai.com/api/docs/models/gpt-6-luna).

tool use Strong

OpenAI API docs: supports Functions, Web search, File search, Computer use.

cost efficiency Strong

Lowest-priced tier in the GPT-6 family ($0.10/$0.50 per 1M tokens, Standard, short context).

Ratings are estimated — limited independent data is available for this model.

Cost-optimized tier of GPT-6, launched 2026-09-22. Route high-volume, focused tasks here; step up to GPT-6 Sol when the task needs more capability.

SCO-639: reasoning, coding, instruction-following, multilingual and speed ratings are left out. No benchmark or per-tier claim was sourced for this entry, and none is inferred.
Capability ratings are qualitative, not a single cited benchmark run

OpenAI API pricing
OpenAI models: GPT-6 Luna
Introducing GPT-6 Sol and Luna — Announcement, 2026-09-22 (title and date via OpenAI RSS; the page itself returns 403 to automated fetches)