Topic
Frontier and open-weight model releases, versions and capability changes.
Research snapshot verified 29 July 2026. News is independently written from cited primary and scholarly sources; provider claims remain attributed.
OpenAI launched GPT-5.6 Sol, Terra and Luna for general availability on 9 July. The family separates flagship, balanced and lower-cost tiers and adds new caching terms, illustrating how frontier releases now arrive as deployment portfolios rather than single models.
Meta introduced Muse Spark 1.1 as a multimodal reasoning model for agentic tasks, reporting gains in tool use, computer use, coding and multimodal understanding. A public preview of the Meta Model API accompanies availability in Meta AI.
Anthropic launched Claude Sonnet 5 on 30 June, positioning it for coding, agents and professional work at scale. The release arrived alongside Claude Science and the restoration of Fable 5 and Mythos 5 access on 1 July.
Google made Gemini 3.5 Flash generally available through its developer platforms at I/O 2026, presenting it as a model that combines frontier intelligence with action. The broader release set included agentic Gemini experiences and multimodal tools.