What changed
OpenAI released GPT-6.1 Sol in ChatGPT Work, Codex and the API as `gpt-6.1-sol`. Standard pricing is $2 per million input tokens, $0.10 per million cached input tokens and $10 per million output tokens; OpenAI positions it near GPT-6 Astra for coding, computer use and professional work.
Why it matters
The same nominal model tier now offers a materially different quality-cost point, which can change routing, budget and fallback decisions.
What to do
Pin `gpt-6.1-sol` in a canary and replay accepted, denied, tool-using and failure cases against the current route. Record exact model, reasoning effort, output, latency, token use and total task cost before promotion.
Caveat
The performance and safety evaluations are provider-run and may differ from production ChatGPT because prompts, tools and effort settings vary. It is not available in ordinary Chat, and long-context and processing-tier pricing differs.