GPT-6.1 Sol
GPT-6.1 SolRankingat max effort?
Full ranking →Alternatives?
OpenKimi K3max-61%+176%$2.00Context: 1.05M → 1M+4
OpenGLM 5.2max-71%+103%$1.47Context: 1.05M → 1M+1OpenGLM 5.3max-71%+177%$2.01Context: 1.05M → 1M+5
OpenDeepSeek V4 Pro 0813max-73%-7%$0.67Context: 1.05M → 1M+6OpenKimi K2.6unstated-74%-57%$0.95 / $4Context: 1.05M → 256KKimi K3maxOpen-61%+176%$2.00Context: 1.05M → 1M+4GLM 5.2maxOpen-71%+103%$1.47Context: 1.05M → 1M+1GLM 5.3maxOpen-71%+177%$2.01Context: 1.05M → 1M+5DeepSeek V4 Pro 0813maxOpen-73%-7%$0.67Context: 1.05M → 1M+6Kimi K2.6unstatedOpen-74%-57%$0.95 / $4Context: 1.05M → 256KGPT-6 Astramax-2%+350%$3.26Monitoring can return HTTP 403+2GPT-6 Solmax-10%+44%$1.04GPT-5.6 Solmax-17%+175%$1.99GPT-5.5 Proxhigh-22%—$30 / $180GPT-5.5xhigh-28%+264%$2.63Prompts with >272K input tokensGPT-5.6 Terramax-29%+93%$1.40Prompts with >272K input tokensGPT-5.6 Lunamax-39%-75%$0.18GPT-5.4 Pro (2026-03-05)-41%—$30 / $180No strict JSONAll OpenAI models →History
3 versionsBenchmarks
in Chat & KnowledgeWatch out 6
Remove unsupported parameters›
With reasoning enabled, remove temperature, top_p and top_logprobs, plus Chat Completions logprobs or Responses message.output_text.logprobs includes. Source ↗
Responses API for tool calling · Chat Completions›
Use Responses for tools; Chat Completions supports this model without tool calling. Source ↗
No none or minimal reasoning›
The none and minimal reasoning efforts are unsupported; choose low, medium, high, xhigh or max. Source ↗
More than 272K input tokens›
Prompts above 272K input tokens charge 2× input and cache rates and 1.5× output rates for the entire request. Source ↗
Cache writes billed at 1.25x›
Cache writes cost 1.25× the uncached input token rate. Source ↗
Ultrafast prices 6x Standard›
Ultrafast mode costs 6× Standard token prices. Source ↗
FAQ
How much does GPT-6.1 Sol cost?›
$2 per 1M input tokens and $10 per 1M output tokens; cached input $0.10 per 1M. A typical benchmark task costs about $0.72 at max effort.
Is GPT-6.1 Sol free to use?›
There is no free API; the cheapest paid price is $2 per 1M input tokens.
How good is GPT-6.1 Sol, and what is it best at?›
#9 of 334 in Chat & Knowledge, #6 of 132 in Coding, #11 of 133 in Agents & Tool Use, #19 of 195 in Writing & Language, #3 of 124 in Vision & Documents. Strongest at: Coding, Agents & work tasks, Reasoning, Long context, Knowledge, Vision.
Is GPT-6.1 Sol better than GPT-6 Sol?›
On FrontierMath Tier 4 (v2), GPT-6.1 Sol scores 100 vs 90 — higher. It is 31% cheaper per task.
How can I use GPT-6.1 Sol?›
Through the API of Amazon Bedrock, Azure, OpenAI.
What is the context window of GPT-6.1 Sol?›
1.05M tokens, with up to 128K output tokens.
When was GPT-6.1 Sol released? Is there a newer version?›
Released 2026-09-29. It is the current version in its line.
Is GPT-6.1 Sol open source?›
No, GPT-6.1 Sol is a closed model available through an API. The closest open-weights option here is Kimi K3.
Can GPT-6.1 Sol read images?›
It accepts text and images, PDF files as input.
What is GPT-6.1 Sol?›
GPT-6.1 Sol is a closed language model from OpenAI, released Sep 2026, the successor to GPT-6 Sol.
What are the best alternatives to GPT-6.1 Sol?›
Kimi K3 (open weights).