OpenAI, Google, and Anthropic launch new AI models in late September
OpenAI rolled out the mid‑range GPT‑6.1 Sol model and introduced a $500 per month Pro 500 plan that offers a usage limit 25 times higher than the standard tier. The higher‑end GPT‑6.1 Astra was postponed for safety reviews. Google unveiled Gemini 4 Argon, which scored 77.9% on the DeepSWE v1.1 coding benchmark (ahead of Claude Opus 5.5’s 74.2%) and 68% on the CWE‑bench v1 security test, while…
Key points
- OpenAI released GPT-6.1 Sol and introduced a $500/month Pro 500 plan with 25× higher usage limit.
- Google launched Gemini 4 Argon, scoring 77.9% on DeepSWE v1.1 and expanding token limit to 1 million.
- Anthropic unveiled Claude Sonnet 5.5, 30% faster than Sonnet 5 and achieving 70.6% on Terminal‑Bench 4.0.
Model pages: GPT-6.1 Sol → · GPT-6.1 Astra → · Gemini 4 Argon →
The story so far
4 episodes →- OpenAI, Google, and Anthropic launch new AI models in late Septemberthis story
[AI News] 2026.10.04_Summary of Last Week's Latest Model Releases
note.com · 4 October 2026
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