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API price OpenAI · 1.1M token context · 1 seller, checked 24 Oct, 18:17 UTC
Other versions: earlier: GPT 5.6 Luna Fast from $0.40 / $2.40. Compare versions
Input, per 1M tokens
$0.20
Output, per 1M tokens
$1.00
Sold by Cheaper Inference .
The only price here comes from Cheaper Inference , a seller we have not verified (our read ). Test it on your own prompts before you rely on it.
Versions Version What it is Sellers From, in / out per 1M GPT 6 Luna Fast this page gpt-6-luna-fast Main listing 1 $0.20 / $1.00 GPT 5.6 Luna Fast gpt-5.6-luna-fast Earlier generation 1 $0.40 / $2.40
Why there are several: the undated name can move to a newer build when the developer updates it, while a dated snapshot is meant to stay fixed, which can suit pipelines that need repeatable behaviour; an experimental build tests new features. Sellers price each version separately and not every seller offers every version, so check a seller's own docs for the build it serves.
Cost calculator: where to buy, and what it costs you
Pick a use case, a volume and a provider. Monthly figures assume 30 days.
Monthly cost with Cheaper Inference
$18.57
$0.0006 per request · 30,000 requests a month
$6.30 $0.27 $12.00
Same workload on other OpenAI models, at their cheapest provider
Spotted a wrong or outdated price? Report it and we fix it at the next update.
Test a seller of this model with your own key, on your own machine.
Context window 1.1M1,050,000 tokens
Cached input from $0.020per 1M tokens
Last checked 24 Oct, 18:17 UTC Price history Cheapest standard price per 1M tokens, recorded every 6 hours since 16 Oct 2026.
$0.00 $0.56 $1.12 16 Oct 24 Oct Every price change this month →
More from OpenAI: GPT-5.6 Terra $2.00 · GPT-5.6 Luna $0.20 · GPT-5.6 Luna Pro $0.20