NeuralStackEvertune’s AI Model Release Tracker lists 140 AI model releases and updates from six providers as of Oct. 7, 2026. Its newest recorded entry is Anthropic’s Claude Haiku 5.5, released on Oct. 7, followed on the same day by OpenAI’s GPT-6 and Intelligent UI update for ChatGPT.
Claude Haiku 5.5 is described as a small, fast model aimed at high-volume tasks such as summaries, classification and live customer support. It is the final member of Anthropic’s 5.5 family, costs far less than Haiku 4.5, and is the first Haiku model with an adjustable effort setting. Anthropic also positions it as a lower-cost helper agent alongside Opus 5.5 and Sonnet 5.5.
OpenAI’s latest tracked release makes GPT-6 the default model in ChatGPT chat for all users. Paid plans use GPT-6 Sol, while Free and Go users use GPT-6 Luna. The accompanying Intelligent UI allows responses to combine text with charts, maps, buttons, forms and small tools such as calculators, while web-search answers begin faster.
Google’s latest entry is Gemini Nano Banana 2.1, released Oct. 6. The image-generation and editing model is described as offering better image quality, closer prompt following and cleaner text inside images at the same speed and cost. It is generally available through the Gemini API and replaces Nano Banana 2.
The tracker’s other latest provider entries are Meta’s Muse Spark 1.3 and DeepSeek V4-Pro. Muse Spark 1.3, released Sept. 2, targets coding and long-running agent work through Muse Code and Meta’s API, with updated behavior around ambiguous prompts, stalled tasks and consequential actions. DeepSeek V4-Pro graduated from preview to full production on Aug. 12 after nearly four months, with no changes to API pricing or integration for existing users.
Why this matters
The release pattern captured by Evertune points to competition moving beyond headline model capability. Anthropic is emphasizing efficient, adjustable work for high-volume use, OpenAI is changing how answers are presented inside ChatGPT, Google is refining image creation and editing, and Meta is focusing on how an agent behaves when operating over longer tasks.
That range also raises the importance of tracking releases by practical function rather than by model name alone. Evertune says its tracker records major releases and AI-search feature updates from OpenAI, Anthropic, Google, Meta and DeepSeek, using official announcements, engineering blogs and press coverage that are reviewed before publication.
The tracker is updated daily, and Evertune says it samples prompts 100 times per model across more than 11 AI models to measure visibility data. Its broader platform connects model visibility research with prompt discovery, recommendations, website optimization, content creation and paid activation through ChatGPT Ads and programmatic advertising partners.
As providers continue to update models and AI-search experiences, Evertune’s tracker is positioned as a running record of changes that can affect both how systems answer questions and how organizations reach users through them. The current lineup shows that the next phase of AI releases will be defined not only by new models, but also by faster interfaces, more specialized agents and increasingly direct links between model behavior and the customer journey.