GPT-6.1 Sol
GPT-6.1 Sol
Near-Astra answers at a fifth of the price. The OpenAI model most teams should deploy now.
Updated
The read
GPT-6.1 Sol launched at DevDay a week after GPT-6 Sol and replaces it at the same price. OpenAI describes it as near-Astra performance at a lower cost, and the leaderboards bear that out: it scores just below Astra on the Artificial Analysis index and well above it with human voters. At two dollars in and ten out, it is priced head to head with Claude Sonnet 5.5, and it is the default choice inside the OpenAI ecosystem.
Where it shines
- Close to Astra on benchmarks for a fifth of the price
- Preferred over Astra by human voters
- Every framework and agent toolkit supports it from day one
Worth knowing first
- Trails Claude Sonnet 5.5 on the Artificial Analysis index at the same price
- Closed weights, so nothing here runs on your own hardware
Index score
90.3
Provisional. This score is read from the product's public capability, not from the one-prompt rebuild the fully reviewed entries went through, so treat it as a placing rather than a verdict.
- Rank
- 04 of 73
- Builds
- LLMs
- Category
- Frontier
- Output
- Text, code and tool calls over an API
- Pricing
- Paid only
- Best for
- Coding and agent work inside the OpenAI ecosystem
Scores are our own editorial judgement, weighted craft 55, speed 10, control 15 and value 20.
Also worth a look
Full index- 01Claude Opus 5.5Claude Opus 5.5ProvisionalFable-level answers for less than the Opus it replaces. The new default.Frontier modelPaid only92.8
- 03Gemini 4 ArgonGemini 4 ArgonProvisionalTop of the human-preference leaderboard, and almost nobody can use it yet.Frontier modelPaid only90.6
- 08Claude Fable 5.1Claude Fable 5.1ProvisionalAnthropic's top tier for the longest, hardest runs, with a cheaper Opus now snapping at its heels.Frontier modelPaid only87.9
