OpenAI releases GPT-6.1 Sol and Anthropic releases Sonnet 5.5
What happened
Between 1 and 2 October 2026, OpenAI released GPT-6.1 Sol and Anthropic released Sonnet 5.5, two models that Latent Space's AINews roundup treats as reshaping the cost-performance frontier. According to a 3 October Latent Space report, GPT-6.1 Sol is priced at $2 and $10 per million input/output tokens, a sharp drop from Astra's $10 and $50. So far the reporting covers only release timing and pricing, with no further performance or evaluation details.
Written by AI from the reports · updated 13 d ago
Timeline
Follow the reports to see the event from each side.
- Latent Space[AINews] not much happened today
GPT-6.1 Sol launch: OpenAI priced Sol at $2/$10 per million input/output tokens, compared with $10/$50 for Astra (pricing summary). Claimed results: It reportedly beats GPT-6 Sol by 6.4 points on DeepSWE v1.1 and Opus 5.5 by 2.2 points on AutomationBench (summary).