GPT-6.1-sol
gpt-6.1-sol
OpenAI · chat · api
Intelligence
Context
1.1M
Max output
128K
Input $/1M
$2.00
Output $/1M
$10.00
Modalities
text
Released
27 Sept 2026
Intelligence Index via Artificial Analysis · 0–100, higher is better
AI summary
● machine-written
OpenAI releases GPT-6.1 Sol, a lower-cost alternative to GPT-6 Astra
GPT-6.1 Sol is OpenAI's chat model designed for complex coding, computer use, and professional work with a 1.05M token context window and up to 128K output tokens. It offers near-Astra performance at approximately one-fifth the token cost, with support for tool calling, vision input, reasoning effort adjustment, and prompt caching.
What's new
- Context window of 1,050,000 tokens with 128,000 maximum output
- Pricing at $2 per million input tokens and $10 per million output tokens for standard requests
- Cached input tokens cost $0.10 per million, reducing effective input cost by up to 90% on repeated context
- Supports adjustable reasoning effort (low, medium, high, xhigh, max)
- Available via API, ChatGPT Work, and Codex for eligible plans
Best for
Complex coding and multi-step software agent workflowsDocument-heavy professional analysis with long context requirementsComputer-use applications with supervised agent interactionsCost-conscious teams comparing near-Astra capability at lower token prices