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OpenAI GPT Luna Latest

openai·openai/gpt-luna-latest·GA·Closed·gpt-luna series·NEW
This model always redirects to the latest model in the OpenAI GPT Luna family.

OpenAI GPT Luna Latest is offered by 3 providers on this page. Its reference price is $0.20 per 1M input tokens and $1.20 per 1M output tokens.

The context window is 1,050,000 tokens, with an output limit of 128,000 tokens. It supports reasoning, tool use, and structured output. Accepted input modalities are PDF, Image, and Text. Its training knowledge cuts off at 2026-02-16.

Specs & pricing

Input / output per 1M tokens
Reference price·NanoGPT
$0.20 / $1.20
Blended $0.45 · Cache read $0.02
Lowest paid·Kilo GatewayGateway
$0.20 / $1.20
Blended $0.45 · 1× spread
Context
1,050,000
Output limit
128,000
Knowledge cutoff
2026-02-16
Released / updated
2026-09-11 / 2026-09-11
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
PDFImageText

Available at 3 providers3 with public prices

ProviderTierInputOutputCache readCache writeContextOutput limitStatus
Kilo GatewayGateway$0.20$1.20$0.02$0.251,050,000128,000
OpenRouterGateway$0.20
tiered >272K: $0.40
$1.20$0.02$0.251,050,000128,000
NanoGPTGateway$0.20$1.20$0.02$0.251,050,000128,000

Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.

Your usage cost

1Kilo Gateway$78.40
2OpenRouter$78.40
3NanoGPT$78.40
The cheapest paid channel is the only channel.

Reasoning control

effort = noneeffort = loweffort = mediumeffort = higheffort = xhigheffort = max

Related models

GPT-5.6 Lunasame series$0.20 / $1.20GPT-5.6 Luna Prosame series$0.25 / $1.50Agentic Chat (GPT-5.6 Luna)same series$0 / $0DeepSeek V4 Flashcheaper alternative$0.15 / $0.60GLM-5.3-Flashcheaper alternative$0.075 / $0.25MiMo-V2.5cheaper alternative$0.14 / $0.28DeepSeek V4.1 Flashcheaper alternative$0.15 / $0.60

Price historyone sample accumulated per data sync

Input list $0.20Output list $1.20Min blended $0.45

Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-12). Each future sync adds a point, and once accumulated a line is drawn here.

Data partly from models.dev (MIT) · NanoGPT official docs ↗