# GPT-6.1 Sol

GPT-6.1 Sol is an OpenAI language model released Sep 29, 2026; OpenAI's newest language model in our dataset is GPT-6.1 Terra. Proprietary, API access only. OpenAI's near-flagship GPT-6.1 model: OpenAI says it performs close to GPT-6 Astra at a fifth of Astra's price. Verified against vendor sources on Oct 26, 2026.

Last verified: 2026-10-26 · Evidence: Reported · Canonical: https://theagenticweekly.com/models/gpt-6-1-sol · JSON: https://theagenticweekly.com/api/models/gpt-6-1-sol

## Key facts

| Fact | Value | Source |
|---|---|---|
| Vendor | OpenAI |  |
| Released | Sep 29, 2026 | https://developers.openai.com/api/docs/changelog |
| API id | `gpt-6.1-sol` | https://developers.openai.com/api/docs/models/gpt-6.1-sol |
| Context window | 1,050,000 tokens (1.05M) | https://developers.openai.com/api/docs/models/gpt-6.1-sol |
| Max output | 128,000 tokens | https://developers.openai.com/api/docs/models/gpt-6.1-sol |
| Input | text, image | https://developers.openai.com/api/docs/models/gpt-6.1-sol |
| Output | text | https://developers.openai.com/api/docs/models/gpt-6.1-sol |
| Licence | Proprietary (API) | https://developers.openai.com/api/docs/models/gpt-6.1-sol |
| Pricing | $2 in / $10 out per 1M tokens | https://developers.openai.com/api/docs/models/gpt-6.1-sol |

## Vendor claims and neutral signals

- Vendor claim (OpenAI): near-Astra performance at one fifth of Astra's price. We have not independently measured this.

## Notes

- At launch it was available in ChatGPT Work and Codex, not yet in ChatGPT Chat. Knowledge cutoff listed: Apr 30, 2026.

## What we tested

Nothing yet. We have not run GPT-6.1 Sol ourselves, so every fact here is Reported from the sources below.

## Sources

- [OpenAI model page](https://developers.openai.com/api/docs/models/gpt-6.1-sol)
- [OpenAI announcement](https://openai.com/index/introducing-gpt-6-1-sol/)
- [OpenAI API changelog](https://developers.openai.com/api/docs/changelog)

Data licence: CC BY 4.0. Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0.