Primary use stated or inferred cautiously from official documentation.
O
OPENAI / GPT-6 Luna (October 29)
GPT-6 Luna · ChatGPT
The October 29 update to GPT-6 Luna in ChatGPT aims for more concise, less flattering responses. It affects Free, Go and signed-out users; on Plus and Pro it applies to the fallback model after the message limit is reached, not the main model.
01 / SUMMARY
The essential
Maximum input capacity when published by the source.
Documented maximum generation limit.
Verified availability channels.
Primary functional family and verified specialties.
Declared terms for API access, model weights, or self-hosting.
02 / TECHNICAL SHEET
Limits and integration
| API ID | GPT-6 Luna (October 29) |
|---|---|
| Model type | Text and reasoning |
| Access model | Proprietary · hosted product |
| License | Proprietary |
| Deployment | ChatGPT |
| Release | 29 OCT 2026 |
| Knowledge cutoff | Not published |
| Entrance | Text |
| Exit | Text |
| Context window | Not published |
| maximum output | Not published |
| Reasoning | Not published |
| Published tools | |
| Structured Outings | Not published |
| Batch processing | Not published |
| Prompt cache | Not published |
| Fine-tuning | Not published |
| Verified platforms | ChatGPT |
Everyday conversation and writing within the access provided by each ChatGPT plan.
This profile covers the ChatGPT update, not an API snapshot. The identifier gpt-6-luna, its pricing and API limits are not attributed to this update. Product availability and quotas may vary by plan.
03 / CAPABILITIES
What it can do
Orientation
Everyday conversation and writing within the access provided by each ChatGPT plan.
Context
Not published · Not published
Tools and integration
Not published
Access
ChatGPT Free and Go; fallback on Plus and Pro
Input modalities
Text
04 / PRICES
Documented cost
| Concept | Worth | Unit/condition |
|---|---|---|
| Standard input | Depends on the ChatGPT plan | Standard API rate |
| Cached input | Not published | Reading reused prefixes |
| Cache write or storage | Not published | The condition varies by provider |
| Standard output | Depends on the ChatGPT plan | May include reasoning tokens |
| Batch input | Not published | Asynchronous processing |
| Batch output | Not published | Asynchronous processing |
No per-token pricing has been verified for this ChatGPT update. Numerical costs remain empty; subscriptions and API billing are different concepts.
i Prices change and may depend on level, region or context length. Check the source before making a decision.
05 / EVALUATIONS
How to read the results
“
The HealthBench scores refer to ChatGPT on October 29 and are length-adjusted on a 0–100 scale. They are not the unadjusted values in parentheses, are not extrapolated to the API and do not replace clinical evaluation.
| Benchmark | Result | Metric | Source |
|---|---|---|---|
| HealthBench · ChatGPT October 29 length-adjusted | 48,2 / 100 | Published score | View source ↗ |
| HealthBench Professional · ChatGPT October 29 length-adjusted | 47,4 / 100 | Published score | View source ↗ |
Inferama only highlights a “best result” when the metric, test set, configuration, and date allow for an equivalent comparison. The supplier's figures are presented as claims from its own source.
06 / VERSIONS
Chronology
GPT-6 Luna · ChatGPT
Version added to Inferama's verified catalog.
07 / SOURCES