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GPT-6.1 Sol Launches, Outperforming GPT-6 Sol in Cost and Intelligence

GPT-6.1 Sol Launches, Outperforming GPT-6 Sol in Cost and Intelligence

First seen 2 Oct 2026, 07:05 UTC • •
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ThreatCluster AI
ThreatCluster •October 2, 2026 at 07:06 UTC
  • •GPT-6.1 Sol launched on September 30, 2026, just a week after GPT-6 Sol.
  • •It scores 1 point below GPT-6 Astra while costing less than a quarter of Astra's price per task.
  • •GPT-6.1 Sol improves intelligence and reduces hallucination rates compared to its predecessor.

On September 30, 2026, OpenAI released GPT-6.1 Sol, just a week after GPT-6 Sol. GPT-6.1 Sol scores 1 point below GPT-6 Astra in the Intelligence Index while costing less than a quarter of Astra's price per task. The new model improves on GPT-6 Sol with a 4-point increase in the Intelligence Index and a reduction in hallucination rates from 60% to 54%. Pricing for GPT-6.1 Sol matches GPT-6 Sol at $2 per million input tokens and $10 per million output tokens, with a higher cache read discount. It also uses 10-30% more output tokens than GPT-6 Sol but achieves better performance across various benchmarks. The model is positioned as the most cost-effective option for agentic workloads, outperforming previous models in both intelligence and efficiency. The release of GPT-6.1 Sol reflects OpenAI's ongoing efforts to enhance AI capabilities while reducing costs.

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Timeline

2017-09-25
CVE-2015-7316 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-22
GPT-6 Sol released
OpenAI released GPT-6 Sol, which scored 72.1% FuncPass and 25.1% SecPass, marking a notable advancement over GPT-5.6 Sol.
Endorlabs
2026-09-30
GPT-6.1 Sol released
OpenAI launched GPT-6.1 Sol, achieving significant improvements in intelligence and cost efficiency over GPT-6 Sol.
News.Ycombinator

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Common questions

What improvements does GPT-6.1 Sol offer?
GPT-6.1 Sol provides a 4-point increase in the Intelligence Index and reduces hallucination rates from 60% to 54%.
How does the pricing of GPT-6.1 Sol compare to previous models?
GPT-6.1 Sol matches GPT-6 Sol's pricing at $2 per million input tokens and $10 per million output tokens, with a higher cache read discount.
Is GPT-6.1 Sol more efficient than GPT-6 Sol?
Yes, GPT-6.1 Sol achieves better performance while being more cost-effective, despite using slightly more output tokens.