Claude Haiku 5.5 launches
Anthropic launched Claude Haiku 5.5 on October 7, 2026, describing it as its fastest, cheapest and most capable small model yet, designed for high-volume and cost-sensitive work.
Update Topics: AI
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Anthropic releases Claude Opus 5.5
Claude Opus 5.5 is available
Anthropic released Claude Opus 5.5 on September 22, 2026. Anthropic says the model performs at roughly Claude Fable 5.1 level on most work while costing less to run than Opus 5.
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Anthropic launches Claude Sonnet 5.5
Claude Sonnet 5.5 launches
Anthropic launched Claude Sonnet 5.5 on September 28, 2026. Anthropic says it is a clear upgrade over Sonnet 5, runs about 30% faster and can cost up to 30% less for many workloads.
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OpenAI introduces GPT-6.1 Sol
GPT-6.1 Sol arrives
OpenAI introduced GPT-6.1 Sol on September 29, 2026, positioning it for coding, computer use and professional work with lower API pricing than Astra.
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OpenAI rolls out GPT-6 with Intelligent UI
GPT-6 rolls out globally in ChatGPT
OpenAI announced the global rollout of GPT-6 in ChatGPT on October 7, 2026. The release introduces Intelligent UI, designed to make responses more interactive and visually useful while improving everyday performance.
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Google Gemini 4 Argon now available
Gemini 4 Argon reaches users and developers
Google has officially released Gemini 4 Argon, positioning it as a frontier model for complex work across coding, finance, legal, cybersecurity, science and other multi-step tasks.
The Gemini app adds improved reasoning and coding, plus a task mode that can work across connected applications. Google says Argon is available through the Gemini app for eligible Google AI Pro and Ultra users and through its developer and enterprise channels.
Announcement date: October 13, 2026.
Official source: Google