SylphxModels

OpenAI

GPT Luna family · v6

GPT 6 Luna

New
openai/gpt-6-luna

openai/gpt-6-luna on Sylphx Models · 400K of context. One Responses contract, with list prices published per million tokens.

Released
Sep 22, 2026 · 1 day old
Provider
OpenAI
Context
400,000 tokens
Open in the playgroundSee a request sampleRead the docs
Input $0.252 / MOutput $1.26 / MCached input $0.0252 / MFull rate sheet
Context window400,000tokens per request
Max outputNot publishedtokens per response
Input$0.252 / Mper million tokens
Output$1.26 / Mper million tokens
Requests · 7d2metered on Responses
Avg TPM · 7d<155 tokens

Pricing

USD per million tokens
Input
$0.252
Output
$1.26
Cached input
$0.0252

$0.50 for 750,000 input and 250,000 output tokens.

Assumption: one batch of 750,000 input plus 250,000 output tokens at the published list prices — recompute for your own mix. Blended $0.504 per million at a 3:1 mix.

Chat replies · 3:1 input:output
$0.504 / M
Long documents · 9:1 input:output
$0.3528 / M
Heavy output · 1:1 input:output
$0.756 / M
Cache write
Not published
Currency and unit
USD / million tokens

Cached input reads cost 90% less than fresh input tokens.

Full rate sheet and billing rules.

Specification

Context window
400,000 tokens
Max output
Not published
Input modalities
Not published
Output modalities
Not published
Family
GPT Luna
Version
v6
Provider
OpenAI
Released
Sep 22, 2026 · 1 day old
Model id
openai/gpt-6-luna

Data posture

Consent-trained

The provider may train on data sent to this model, and Zero Data Retention is not available. Keep regulated or confidential material on a standard-posture model.

Training on what you send
Yes
Zero Data Retention
Not available

Traffic

Daily traffic the platform metered on Responses for this exact model id. Totals are the window they name; a day with no traffic is zero, not missing.

Requests · last 7 days
2
Tokens · last 7 days
55
Average TPM · last 7 days
<1
Series total · 14d
2 req · 55 tok

14-day total 2 · peak 2 on Sep 22

Sep 9Sep 22
Daily numbers for the last 14 days
Daily requests and tokens metered for openai/gpt-6-luna
DayRequestsTokens
2026-09-0900
2026-09-1000
2026-09-1100
2026-09-1200
2026-09-1300
2026-09-1400
2026-09-1500
2026-09-1600
2026-09-1700
2026-09-1800
2026-09-1900
2026-09-2000
2026-09-2100
2026-09-22255
curl https://api.sylphx.ai/v1/responses \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-6-luna",
    "input": "Summarise this incident report in three bullets.",
    "stream": false
  }'

How to call it

Send the official Responses document to the base URL above with your organization key and this exact model id. Streaming arrives as ordered events with one terminal event.

  • Retries: send an Idempotency-Key and a retry replays the original response instead of billing twice.
  • Errors: typed envelopes tell you whether to retry, wait, or fix the request.
  • Keys: mint and revoke organization keys from the console.
QuickstartResponses APIErrors and retries

Related models

Derived from this catalog: same provider first, then the same family, then the nearest neighbours by input price and context window.

More from OpenAI

Same provider

Similar price and context

Nearest by input price and context window

Independent evaluation

We do not publish benchmark scores for this model — we have not verified any. These external leaderboards run their own tests, so check them against your own workload.

Not our numbers
2 requests metered on openai/gpt-6-luna over the last seven daysEvery OpenAI model →