# GPT-6 Sol

OpenAI, released 2026-09-22

**Verdict: conditional.** GPT-6 Sol is the lower-priced companion to GPT-6 Astra and succeeds GPT-5.6 Sol at half its per-token rate, with a 1.05M-token context and 128K output. Conditional because every published score is OpenAI's own and prompts over 272K input tokens bill at higher rates. GPT-5.6 Sol stays on the price list with no deprecation notice, so nothing forces a migration. Right for teams routing hard coding and agent work to OpenAI. Last verified 2026-10-02.

## Pricing

- Input: $2 / 1M tokens
- Output: $10 / 1M tokens
- Context: 1.05M ctx; over 272K $4/$15; cache $0.20

## Strengths

- Cutting frontier spend: $2 input and $10 output per 1M tokens, half GPT-5.6 Sol's $4/$20, with cached input at $0.20
- Long inputs: a 1,050,000-token context window and up to 128,000 output tokens
- Agentic coding and computer use, where OpenAI reports 68.8% on DeepSWE v1.1 and 60.5% on OSWorld 2.0 offline
- Asynchronous jobs: batch runs at $1/$5 per 1M tokens short context
- Starting new Sol work: OpenAI's model page now points to GPT-6.1 Sol as the newer Sol model, at the same $2/$10 with cached input at $0.10 against $0.20
- Budgeting off the headline rate on long prompts: over 272K input tokens it bills $4 input and $15 output per 1M
- Decisions that need independent benchmarks: every published score is OpenAI's own
- Audio or image output: it takes text and images and returns text only

## Benchmarks

- DeepSWE v1.1, max effort (OpenAI-reported): 68.8% (https://openai.com/index/introducing-gpt-6-sol-and-luna)
- Agents' Last Exam, max effort (OpenAI-reported): 56.4% (https://openai.com/index/introducing-gpt-6-sol-and-luna)
- OSWorld 2.0 offline, xhigh (OpenAI-reported): 60.5% (https://openai.com/index/introducing-gpt-6-sol-and-luna)
- AutomationBench, xhigh (OpenAI-reported): 33.2% (https://openai.com/index/introducing-gpt-6-sol-and-luna)

## Sources

- [OpenAI Docs: API changelog (Decisions API beta, October 6, 2026)](https://developers.openai.com/api/docs/changelog)
- [OpenAI API docs: gpt-6.1-sol model](https://developers.openai.com/api/docs/models/gpt-6.1-sol)
- [OpenAI: Introducing GPT-6 Sol and Luna](https://openai.com/index/introducing-gpt-6-sol-and-luna)
- [OpenAI API pricing](https://developers.openai.com/api/docs/pricing)
- [OpenAI API docs: Deprecations](https://developers.openai.com/api/docs/deprecations)
- [OpenAI API docs: gpt-6-sol model (points to GPT-6.1 Sol as newer Sol)](https://developers.openai.com/api/docs/models/gpt-6-sol)

Canonical: https://neomanex.com/models/gpt-6-sol