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GPT-6 Luna (Fast)

openai·openai/gpt-6-luna-fast·GA·Closed·gpt-luna series·NEW
OpenAI's most efficient model for focused, high-volume tasks

Specs & pricing

Input / output per 1M tokens
Reference price·Vercel AI Gateway
$0.20 / $1.00
Blended $0.40 · Cache read $0.02
Lowest paid·Vercel AI GatewayCloud
$0.20 / $1.00
Blended $0.40
Context
1,050,000
Output limit
128,000
Knowledge cutoff
2026-05-18
Released / updated
2026-09-22 / 2026-09-22
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
TextImagePDF

Available at 1 providers1 with public prices

ProviderTierInputOutputCache readCache writeContextOutput limitStatus
Vercel AI GatewayCloud$0.20
tiered >272K: $0.40
$1.00$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.

Reasoning control

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

Your usage cost

1Vercel AI Gateway$68.40
The cheapest paid channel is the only channel.

Price historyone sample accumulated per data sync

Input list $0.20Output list $1.00Min blended $0.40

Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-23). Each future sync adds a point, and once accumulated a line is drawn here.

Related models

GPT-6 Lunasame series$0.10 / $0.50GPT Luna Latestsame series$0.20 / $1.20GPT-5.6 Lunasame series$0.20 / $1.20GLM-5.3-Flashcheaper alternative$0.15 / $0.50MiMo-V2.5cheaper alternative$0.14 / $0.28Qwen3.8 Flashcheaper alternative$0.12 / $0.40Gemini 2.5 Flash-Litecheaper alternative$0.10 / $0.40
Data partly from models.dev (MIT) · Vercel AI Gateway official docs ↗