# C13 — OpenAI API changelog: GPT-6.1 Sol release

- Publisher: OpenAI
- Source: [OpenAI API changelog: GPT-6.1 Sol release](https://developers.openai.com/api/docs/changelog)
- Published: 2026-09-29
- Updated: Not stated / not established
- Accessed: 2026-10-22
- Type: Official dated release entry
- Evidence: opened primary page; relevant content read.

## Paraphrased finding

September 29 entry states GPT-6.1 Sol Standard prices apply through 272,000 input tokens; September 22 entry states the same short-context boundary for Luna.

## Limits

Dated release entry establishes boundary; current pricing page remains the rate authority.