GPT-6.1 Sol
Professional coding and agentic work where Astra-class quality must meet mid-tier pricing.
GPT-6.1 Sol supersedes GPT-6 Sol, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.4 Pro, GPT-5.4, GPT-5, GPT-4.1, GPT-4o, GPT-4 Turbo.
What are GPT-6.1 Sol's specs and price?
GPT-6.1 Sol, built by OpenAI, ships a 1.1M-token context window and a 128K-token max output, released 2026-09. It supports text and vision input with a dedicated reasoning mode and costs $4.00 per million blended tokens, the 41st-cheapest of 49 models we track.
What are GPT-6.1 Sol's specs?
| Context window | 1.1M tokens |
| Max output | 128K tokens |
| Modalities | text, vision |
| Extended thinking | Yes |
| Released | 2026-09 |
| Knowledge cutoff | 2026-06 |
| Provider | OpenAI |
Verified 2026-10-01 — source.
Where does GPT-6.1 Sol rank?
What are GPT-6.1 Sol's strengths?
- Near-Astra coding and agentic performance
- One-fifth of Astra’s token price
- Fewer misalignment flags than GPT-6 Sol
What else should you know about GPT-6.1 Sol?
What are common questions about GPT-6.1 Sol?
What is GPT-6.1 Sol's context window?
GPT-6.1 Sol has a 1.1M-token context window and a 128K-token max output — the 7th-largest context of the 49 current models we track. Source: https://platform.openai.com/docs/models, verified 2026-10-01.
Does GPT-6.1 Sol support vision or audio input?
Yes — GPT-6.1 Sol accepts vision input in addition to text.
Does GPT-6.1 Sol have a reasoning or extended-thinking mode?
Yes — GPT-6.1 Sol exposes a dedicated reasoning mode for multi-step problems.
When was GPT-6.1 Sol released, and what is its knowledge cutoff?
GPT-6.1 Sol was released 2026-09 with a knowledge cutoff of 2026-06.
How much does GPT-6.1 Sol cost, and who provides it?
GPT-6.1 Sol is served by OpenAI at $4.00/M blended tokens (3:1 input:output) — the 41st-cheapest of 49 current models. Full pricing breakdown: /llm-api-pricing/gpt-6-1-sol.