Anthropic Claude Fable 5
**Anthropic** released two major models: **Claude Fable 5** for general availability and **Claude Mythos 5** for restricted access, with fallback to **Claude Opus 4.8** for sensitive…
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**FrontierCode** benchmark by **Cognition** highlights the challenge of coding tasks with the best model, **Opus 4.8**, scoring only about **13%** on the hardest subset, indicating coding…
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**Anthropic's Mythos/Opus cycle** sparked mixed reactions with praise for **Claude Mythos**'s one-shot workflows and concerns over **Opus 4.8** benchmark regressions. **Opus 4.7** showed strong chemistry task…
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**NVIDIA** released **Nemotron 3 Ultra**, a fully open **550B MoE** model with **55B active parameters** and **1M context**, optimized for long-running agent tasks with up to…
Microsoft Build: MAI-Thinking-1 and MAI Family models, Surface RTX Spark Dev Box, and OpenClaw in Windows
**Microsoft** introduced **MAI-Thinking-1**, a **35B parameter MoE model** with **256K context**, achieving **97% on AIME 2025** and outperforming **Sonnet 4.6** in human preference tests. The broader…
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**Microsoft** released the detailed technical report for **MAI-Thinking-1**, a generalist reasoning model trained without third-party distillation, achieving **97% on AIME 2025** and outperforming Sonnet 4.6 in…
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**NVIDIA** led open-source AI model releases with **Cosmos 3**, a comprehensive omnimodal world model unifying language, image, video, audio, and action using a Mixture-of-Transformers design, and…
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**Anthropic** rolled out **Claude Opus 4.8**, which shows incremental improvements but mixed benchmark results, including better cooperation and coding behavior but some regressions in document parsing.…
Anthropic raises $65B in Series H at a $965B post-money valuation, releases Opus 4.8 and Dynamic Workflows
**Anthropic** announced a massive **$65B Series H financing** at a **$965B valuation**, led by **Altimeter, Dragoneer, Greenoaks, and Sequoia**, with run-rate revenue surpassing **$47B**. They launched…
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**Harness engineering** is emerging as the key differentiator for coding agents, emphasizing the stack of **model + harness + eval loop** over just stronger base models.…